biochar

COP28 - Soil Carbon sequestration, Food productivity and Climate Economics

I want to start by quoting a Joni Mitchell song called ‘Woodstock’ which goes:

We are stardust

We are golden

We are billion year old carbon

And we got to get ourselves

back to the garden

Carbon is in almost all of the food we eat.
Carbon is in all plants

1 in every 8 atoms in our bodies is carbon

Getting ourselves ‘back to the garden’ means making sure that carbon is our ally, not our enemy

It was, as carbon dioxide, once 95% of our atmosphere

Now it is less than 1/10 of one percent

We are converting carbon from 12-15% in healthy organic soils to as little as ½%. 

Atmosphere 95% Carbon dioxide. Now:  .04%

Cyanobacteria were the earliest lifeform that could convert carbon dioxide into carbohydrate, paving the way for microbial life and ultimately, all plants and animals.  Today the total biomass of microbes is over 90 billion tonnes, about the same amount as in plants all animals are 2 billion tonnes C and humans are less than 1/10 of a billion  tonnes of carbon.  It was, as carbon dioxide, once 95% of our atmosphere.

“In my book a pioneer is a man who turned the grass upside down, strung barbed wire over the dust that was left, poisoned the water and cut down the trees, killed the Indian who owned the land and called it progress”
— Charles M. Russell – ‘the cowboy artist’

We humans, once we started farming, emitted a lot of carbon from the soil, where it does good, to the atmosphere, where it stops our planet reflecting sunlight, trapping it and thus causing global warming

‘We didn’t know what we were doing because we didn’t know what we were undoing’
— Wendell Berry

Farmers in the US sent billions of tonnes of soil carbon into the atmosphere as carbon dioxide.  Nobody knew this was happening, but soil fertility eventually ran out.

I was born in Nebraska…near that red X on the map above.  There were over 250 tonnes of soil carbon per hectare when my great grandfather ploughed virgin prairie back in 1885.  By the time I was born, about 60 years later, that 250 tonnes was down to 20 tonnes of carbon per hectare.  The other 90% had disappeared into the atmosphere as carbon dioxide.  The  fertility of the soil suffered, but chemical fertilisers came along just in time to keep things going.  The nitrous oxide from those fertilisers made things worse, though, as nitrous oxide is a greenhouse gas that has a refractive index 300 times stronger than carbon dioxide.  So nitrogen fertiliser increases the trapping of heat on the planet, too.

A lot of that soil carbon was lost because farming destroyed the soil structure and when it rained heavily in 1927 huge amounts of soil washed down the Missouri and Mississippi rivers, wiping out many black farmers who had small farms after slavery ended. 

Mississippi Floods 1927

Most emigrated to Chicago or Detroit.  Many blues songs described this wipeout, including ‘Muddy Waters’ – not the singer, but a song about losing a farm to that tide of mud.

Dust Bowl 1935

A few years later the fractured soils of the Midwest gave way again and started to blow away.

An Englishman, Richard St Barbe Baker, one of the founders of the Soil Association, was asked to set up a tree planting programme that created a line of 220 million trees from the Canadian border to Mexico that stopped further soil loss.

Of course fossil fuels are part of the problem, but agriculture, up till 1980, was responsible for half of all the carbon dioxide increase since 1850.  Fossil fuels passed farming around 1950 and then increased by 5 times. Farming emissions more than doubled, largely thanks to chemicals. Now it’s a total of 37 billion tonnes a year.   

50% of total CO2 increase 1850-1980 is from farming. 100% of total CO2 reduction can come from farming

From 1850-1980:                                        Today

Total CO2 from Farming:        160 Billion Tonnes             10 billion

Total CO2 from Fossil Fuels:  165 Billion Tonnes              27 billion

If we change the way we farm and even keep burning fossil fuels, we could reduce greenhouse gas levels by at least 20 billion tonnes a year and be back to a stable climate in a decade or so.

Mycorrhizae

Mycorrhizae take the carbon that plants make in their leaves as carbohydrate (sugar) and use it to grow the underground population of microbial biomass, the soil microbiome

Mycorrhizae Networking

They form a network that is the soil equivalent of the internet – if a plant needs something the mycorrhizae feed more sugar to the microbes that can help.

Actinomycetes and streptomyces - Nature’s antibiotics

Actinomycetes                                          

Streptomyces

They feed poisonous bacteria that make chemicals that kill plant diseases (and are the source of our medical antibiotics)

Mycorrhizae feed Trichoderma fungi, whose threadlike hyphae strangle root-eating nematodes. It’s hard to imagine fungi killing worms in the soil, but they can.

All these materials are made of carbon and ultimately decompose and become the carbon in the soil from whence they came. Chemical fertilisers reduce mycorrhizae and therefore soil carbon

ANNUAL GLOBAL NITROGEN FIXATION

                              Mtonnes N2 per year

INDUSTRIAL

Industrial (Haber-Bosch)         ~50

Combustion                               ~20

                           TOTAL           ~80

NATURAL

Agricultural land                       ~90

Forest & non-agricultural land   ~50

Lightning                               ~10

                           TOTAL       ~150

Total Industrial and Natural:       230 M tonnes

WE ARE LOSING…

39 FOOTBALL FIELDS A MINUTE (Volkert Engelsman - IFOAM)

12 MILLION HECTARES OF LAND DEGRADED EVERY YEAR

12 million hectares of land degraded every year -      1.8% of available land lost to farming

WE ONLY HAVE 1.5 BILLION HECTARES THAT EQUATES TO ONLY HAVING 125 YEARS OF FARMLAND LEFT.  

This madness has to stop. EVEN IF IT JUST TO GUARANTEE FOOD FOR OUR GRANDCHILDREN, NOT TO MENTION REDUCING ATMOSPHERIC CARBON DIOXIDE

Stop subsidies

Put human health first

Green Revolution had unintended consequences

Genetic Engineering a problem, not a solution

Little time left

Protect our agricultural capital (soil)

Support small farmers and diverse ecosystems

Study and learn from traditional farming

Reward farmers who prevent climate change

The path to sanity was marked out 15 years ago by the 400 scientists on the  International Assessment of Agricultural Science and Technology for Development, the IAASTD.   Its conclusion was that we need to reward farmers who prevent climate change

Eight years ago at COP21 in Paris every nation in the world signed up to an agreement that included Article 6 which said we should reward farmers who prevent climate change

Agriculture must be included in reducing Greenhouse Gas levels.  Sultan Al Jaber, who organised this conference, has said that agriculture will be high on the agenda in COP28 in Abu Dhabi this November and this is why we’re here.

CARBON FARMING EFFICIENCY

Industrial Farm – 12 calories of fossil fuel energy to produce

               1 calorie of food

Organic Farm – 6 calories of fossil fuel energy to produce         

             1 calorie of food

Farmer with a hoe – 1 calorie of human energy to produce

             20 calories of food

Farmer with a hoe:    120 times more energy-efficient than an organic farmer

                                    240 times more energy-efficient than an industrial farmer

An industrial farm uses 12 calories of fossil fuel energy to produce 1 calorie of food.

Organic is better, it uses 6 calories of fossil fuels and it increases soil carbon.

In terms of energy efficiency the organic farmer  uses at least half as much energy as an industrial farmer and increases soil carbon into the bargain.

There’s money in it too, trading carbon credits.

When the boys in the City of London and on Wall Street get it, there is hope.  There is money to be made in carbon and they don’t want to miss out

Rodale Institute 30 year trial results

  1. Organic uses 45% less energy

2. Average yields match conventional (soybeans/corn)

3. C sequestration 1 MT/ha (3.7 T CO2/ha) per annum

Organic farming sequesters at least 4  tonnes of CO2 per hectare per year.  La Vialla a biodynamic farm in Italy, sequesters 10 tonnes per hectare per year, validated annually by the University of Siena for the last 15 years.

“We could sequester the equivalent of the anthropogenic carbon
gas produced by humanity today. Storing carbon in the soil is
organic matter in the soil, organic matter is fertilizing the soil.”
— French Agriculture Minister Stephane Le Foll

  BY LAW: CO2 price to be € 56/tonne  in 2020 and €100/tonne in 2030. Today’s price  €106 /tonne  now

In response to Le Foll after COP21 in Paris the French Government agreed a target carbon price of €56 per tonne by 2020 and €100 per tonne by 2030.  They were too conservative.  The carbon price today is €80 per tonne

The Carbon Border Adjustment Mechanism will impose a carbon fee on imports into the EU that reflects this € 80 per tonne price.  That will encourage anyone who exports to the EU to reduce carbon and increase sequestration

1997 - ‘Organic’ ‘Wholegrain’ ‘No GMOs’ One year after they were introduced

‘Carbon Neutral’ Future Forests became The Carbon Neutral Company

The world’s first ever carbon neutral food product was Whole Earth Organic Wholegrain Corn Flakes 1996.  We planted trees to offset our carbon footprint, but it turned out we didn’t have to plant many because the organic farmers who grew the organic corn were increasing soil carbon as organic matter every year.  That’s when the penny dropped for me about organic farming and carbon sequestration

What about Wheat and Barley?

Home Grown Cereals Authority

Most emissions come from fertiliser and fertiliser induced field emissions, i.e soil breakdown.  Growing organically can increase soil carbon and reduce emissions. 

Farming carbon means that an organic farmer can sell at the same price as the non-organic farmer and make more money. If farmers have the same income, then organic wheat would be cheaper and an organic loaf of bread would be cheaper than one with glyphosate herbicide residues, now known to cause a multiplicity of human diseases.  Who’s going to insist on paying more for a loaf of bread that is less healthy?

(Ignores antibiotics cost to human health)

With beef the methane emissions every time a cow burps or farts are a big problem, but less when they are on pasture and regenerative grazing.

Vegans and Vegetarians have lower emissions, which could be reversed if they were 100% organic – which many are.

NET ENERGY LOSS:

CORN ETHANOL    -50%

PALM OIL BIODIESEL -8%

There is never any justification for burning food.  1 person dies every 7 minutes of hunger and we burn half of America’s corn crop as ethanol in gasoline and make ethanol from wheat and barley and biodiesel from rapeseed and palm oil.  We scream at food companies for using palm oil instead of heart-destroying hydrogenated fat while they burn subsidised palm oil in their transportation vehicles. Carbon pricing would stop all of that nonsense dead.  Corn ethanol has a higher carbon footprint than fossil fuel gasoline but it’s ‘renewable’ but so what?

Farmers vs Architects

            Vancouver “Woodscraper” - Wooden buildings will be cheaper than concrete and steel

With carbon pricing it will be cheaper to build with wood than with steel or concrete.  Wood that goes into a building sequesters carbon for centuries.  I live in an oak frame house that was built 260 years ago and the carbon in it ain’t going anywhere. A 70 storey ‘woodscraper’ in Osaka Japan sequesters a huge volume of carbon and, as a bonus, is more resilient to earthquakes.

BIOCHAR

What is it?

Charcoal made to be used as a soil improver

What does it do?

•Increases microbiological populations

•High surface area adsorbs mineral nutrients

•Reduces plant disease

•Reduces fertiliser use

•Help soils retain moisture

•Improves soil structure

•Reduces soil greenhouse gas emissions N2O

•Long term carbon sequestration

Sawmill by-products and farm waste like rice husks and corn stalks can be made into biochar.  This is agricultural charcoal and is almost pure carbon. When it’s in soil it helps with drainage, soil aeration, keeps moisture in the soil and supports a resilient and vibrant soil microbiome and minimises loss of soil nutrients. 

Biochar’s tiny pores are where the soil microbiome flourishes undisturbed by nematodes and protozoa and get on with creating perfect conditions for healthy plants grown under organic methods and represent a permanent addition of carbon to the soil that would otherwise be in the atmosphere.  It has been used extensively on the Urban Farm at Expo City and is being applied in other Gulf countries to restore degraded and desertified soils to full fertility.  There is a biochar session on the 10th which I recommend you attend,

Who’s feeding the world?

70% of world’s food grown on farms smaller than 5 hectares - NO SUBSIDIES

30% of the world’s food grown on industrial farms - $350 Billion yearly SUBSIDIES

The subsidies farmers receive are mostly to increase emissions from soil degradation, nitrous oxide emissions, methane emissions and to convert good food into biofuels.  Carbon pricing can totally replace subsidies, restore fertility to our soils, improve the nutritional value of our food, fight hunger and save our lovely planet from global warming

 

Thank you

Craig Sams

Chairman Carbon Gold Ltd

Director, Soil Association Certification

Expo City Farm Workshop space December 3rd & 4th 2023

Green Brexit conference - 'Is a Zero Carbon Future Possible?' I make the case for pricing all carbon equally.

In March 2018 I was a panellist at a Green Brexit conference - our theme was 'Is a Zero Carbon Future Possible?  The video is below. I come in at 8:34 and 24:56 and 39:05 but the whole session is interesting. The point of this conference was to explore how Brexit could be a positive green step away from the distortions, waste and environmental degradation that the Common Agriculture Policy has brought it its wake. The conclusion was the there needs to be an overarching commitment to the environment that legally binds all future UK governments of whatever political colour. My message was that the one thing that makes a lot of wishes come true is to reward people who take carbon out of the atmosphere. The atmosphere heated up at 39:05 when Michael Liebreich called me out for seeking a universal and equal price for all carbon - he called it 'utopianism' and naive. Maybe he's right, in which case we are all going to die.

 

 

 

Capitalism Must Price Carbon - Or Die

This was a speech I gave at the Harmony in Food and Farming conference in Llandovery, Wales in July 2017.

Please click here to see video clips of the Prince of Wales, Patrick Holden and myself during the conference, which was organized by The Sustainable Food Trust. It aimed to develop an agricultural perspective on the ideas propounded in the book 'Harmony' by HRH The Prince of Wales and Tony Juniper.

In 1967 Joni Mitchell wrote a song called Woodstock that included these lines:

“We are stardust, We are golden

We are billion year old carbon

And we got to get ourselves

back to the garden”

We are indeed ‘billion year old carbon’ – the average person of about 80kgs/176lbs  contains about 15kgs/33lbs of carbon.  That ancient carbon is in our bones, our muscle, our fat and our bloodstream, as carbohydrate, fat, protein and other compounds.  The carbon in our bodies may have been previously in soil, in trees, in charcoal, in dinosaur turds, in mosquitoes, in honey...  It was everywhere before it ‘reincarbonated’ in us.  Carbon is immortal.   And it is stardust.

A billion or so years ago a very hot star kept getting hotter.  As it got hotter, it formed hydrogen, then carbon, then oxygen and then the other elements that we know.Sir Fred Hoyle, the great astrophysicist, described this as ‘stellar nucleogenesis’ – stars creating atoms.

When that star got too hot it exploded, became a ‘supernova’ and blasted its carbon, oxygen, hydrogen and rock into space.  Those chunks of rock and elements consolidated to form our solar system, with a sun that is still burning today with the remaining heat of the star that formed it a billion years ago.

Carbon is a promiscuous atom, it has 4 points where it can ‘mate’ with other elements.  That’s why there are so many carbon-based molecules and why carbon is the foundation of all living things.  Where there’s life, there’s carbon.

 According to Hoyle, life, in primitive form, was everywhere. This was called ‘Panspermia.’

Life in rock was called ‘Lithopanspermia.’

Life was fungi. That life bumbled along, depending on acid rain from the very CO2-rich atmosphere a billion years ago to break down carbon that was stored in rock. Then a miracle happened that changed everything.

Bacteria called cyanobacteria became able to combine carbon dioxide CO2 from the atmosphere with H2O water, using sunlight energy, to make carbohydrate C6H12O6, whilst excreting oxygen.  That carbohydrate was the sugar that is the basis of all living energy in plants and, eventually, in animal life too.

Once this happened, one can speculate that the rock-eating fungi saw their chance and organised the cyanobacteria into chain gangs, maximising their potential to capture carbon from the carbon dioxide-rich atmosphere, then at about 95% CO2.

These became algae, then simple plants, all busy making sugar to feed their own growth and, more importantly, to nourish the growth of the fungi that created them.

The fungi worked with other microbes in the soil, thriving on the sugar coming from the plants and delivering back to 'their' sugar-making plant all the mineral nutrients that they needed to grow.  Plants died and decomposed.  Fungi and bacteria died and decomposed. The carbon-rich detritus of their existence rotted down to become what we know as ‘soil’ – a most precious resource because it is the perfect habitat for fungi and bacteria and a rich source of recycled nutrients for plants.

This soil built up over millions of years, producing rich plant growth that eventually could support the large life forms such as dinosaurs and brontosaurs that existed in the ‘Carboniferous’ age.

This was the soil that early pioneers found in the American Midwest, rich in organic matter that ran very deep thanks to the 3 metre roots of prairie grasses.

When my great grandfather began to plough virgin prairie in Nebraska back in 1885, the soil on our farm contained over 100 tonnes of carbon as organic matter (organic matter in soil is approximately 50% carbon).  By the time I was born in 1944 this was down to about 20 and now it is closer to 10, totally dependent on fertilizer and pesticides.

Farmers are frugal, on our farm we grew and processed almost all the food that we ate, only buying in commodities like flour, salt, sugar and soap that we couldn't make on the farm.  Old calico flour sacks were washed and recycled as clothing, overalls for the boys and dresses for the girls.

Some enterprising flour companies printed pretty patterns on their flour bags when they realised this was happening.  My mother and her sister Thelma wore Nell Rose flour sack dresses.

The men were frugal too, but they were unwittingly wasting the most precious resource on the farm, the soil.  As the poet Wendell Berry put it:

 "We didn't know what we were doing because we didn't know what we were undoing." 

What we were undoing was all the decomposed plant matter that had been accumulating ever since those first Cyanobacteria sped up the process of life on Earth.

The destroyed soil lost its water holding capacity and lost its structure and integrity.  The result was the great Mississippi floods of 1927 when the river was 60 miles wide from April to October, sparking the Great Migration of African-Americans to northern cities as their farms were submerged for half a year.

Then in the 1930s the Dust Bowl triggered another migration, of "Okies" from their farms in Oklahoma, Kansas and western Nebraska as their farms became submerged in dust and dirt.  Richard St. Barbe Baker, an Englishman who founded Men of The Trees in 1926 and was a founder member or the Soil Association, helped restore the broken soils of the Midwest.  Operating under the banner of President Roosevelt's Civilian Conservation Corps he oversaw 3 million men who planted 10 billion trees between 1933 and 1940.  (These men also made good soldiers in WW2).

Tractors also played a destructive role, they could plough twice as deep as a horse-drawn plough, bringing up fertility and carbon from deeper in the soil.  My Uncle Floyd (pictured with me in 1947) still used horses to draw his 8-row planter because horses didn't compact the soil. Tractors did, weakening soil structure.

This experience alarmed people in Europe.  In Britain Eve Balfour wrote "The Living Soil" which proposed a new approach to agriculture that worked with nature and became known as 'organic farming.'

Eve Balfour collaborated with Dr. Innes Pearce who had shown at the Pioneer Project in Peckham that low income families did much better if they understood the basics of good nutrition and domestic hygiene.

Together they formed the Soil Association in 1947 on the premise that good farming would produce heathy food to nourish healthy people and create healthy societies.

My introduction to organic food and healthy eating came via the Japanese guru Georges Ohsawa, author of Zen Macrobiotics.  I imported the books to the UK and sold them via various bookshops.

I sold brown rice snacks at the UFO Club, where the Pink Floyd were the house band.  In February 1966 I opened a restaurant in Notting Hill to spread the macrobiotic message.  In 1968 my brother Gregory opened Seed restaurant, our larger restaurant in Bayswater, London.

Getting ourselves back to the garden

ZEN MACROBIOTICS - Taoism

  • Balanced - Yin and Yang

  • Organic - Sustainable

  • Wholegrain

  • Food for health

  • 'Justice' (Fair)

  • Japanese (Miso, Nori, Tamari)

  • No additives, no hormones

  • Avoid sugar

  • Eat only when hungry

  • Exercise and Activity

Like the Stoics mentioned in the Prince of Wales’ book "Harmony" we believed in "an attunement between human nature and the greater scheme of the Cosmos."  We saw this through the prism of Daoist yin and yang philosophy and saw it as the key to a long and happy life ('macro' = 'big, long', 'bios' = 'life').

When we launched a range of macrobiotic food products in 1970 we branded them "Harmony" with a trademark that was a Yin Yang symbol with leaves and roots.

The company went on to become Whole Earth Foods a decade later - unfortunately 'Harmony' was a brand we couldn't register in our key European markets.

When I launched Whole Earth cornflakes in 1997 a friend Dan Morrell, who had founded Future Forests (later to become the Carbon Neutral Company) asked me if I'd like to take the corn flakes 'carbon neutral' -  a term he originally coined. .  He then commissioned  Richard Tipper of the Edinburgh Centre for Carbon Management to measure the carbon footprint of the cornflakes.

To our pleasant surprise we had to plant hardly any trees to offset the carbon used in growing, shipping, processing, packaging and distributing the cereal because the increase in the organic matter on the farms where the corn was grown almost completely offset the carbon emissions from everything else.  That's when I understood that, if we priced carbon into the cost of food, people would farm in a very different way.  It is now urgent that we do so

The UN has said that we only have 60 years of farming left. Farming generates more than a third of the annual increase in greenhouse gas. 

Volkert Engelsmann of IFOAM has calculated that we are losing farmland at the rate of 30 football fields every minute.  None of these losses come from organic farming, which is restorative and regenerative.

Industrial farming wastes energy.  It takes 12 calories of fossil fuel energy to produce one calorie of food energy.  A farmer with a hoe uses 1 calorie of human energy to produce 20 calories of food energy.  On a calorie-for-calorie basis a farmer with a hoe is 240 times more carbon efficient than a farmer with lots of equipment and inputs.  More than 30 years of trials at the Rodale Institute farms in Pennsylvania show that organic farming can sequester 1 tonne of carbon per annum.  They have also shown that once the soil is in good shape, the yields match those of industrial farming.

There is an effort afoot to attempt to bring market forces into bringing an end to this potentially disastrous loss of viable farmland.  Part of this is to attempt to appeal to the self-interest of companies like Unilever and General Mills whose supply chain will suffer if farmland becomes unviable and unavailable.

The French National Institute for Agricultural Research published a report in 2015 that stated that if farmers could sequester 4 parts per 1000 of organic matter,  that’s 0.04%, every year in their soil that would be enough to totally offset the annual increase in greenhouse gas emissions that is causing climate change.  That’s without counting any transition to solar, wind or greater energy efficiency.  As a result the French National Assembly voted a carbon price of €65 per tonne to take effect in 2020 and to include agriculture.  French Agriculture Minister Stéphane Le Foll then announced his ‘4 per 1000’ initiative which became part of the Paris Climate Agreement. It was endorsed at COP 22 in Marrakech and  36 countries so far have signed up to participate in restoring soil, the capital base of every nation.

The Prince of Wales co-authored a children’s book called ‘Climate Change’ that shows how carbon goes into the atmosphere and how it comes back into the earth and the sea.  The net annual increase is 16 billion tonnes.

A 3000 hectare biodynamic farm called Fattoria La Vialla in Tuscany Italy has its carbon measured every year by a team from the University of Siena.  La VIalla are sequestering ‘7 per 1000’ every year.  If everyone farmed like those 3 brilliant brothers  in Italy, whose farm is roughly 1/3 pasture, 1/3 forest and 1/3 everything else (grape vines, cereals, fruit, vegetables), then we would not only cancel out the 16 billion tonne increase in CO2 but would see a 12 billion tonne reduction every year.   Additional benefits would be greater biodiversity, cleaner water, less risk of drought and flooding and safer food.  (Their wine is pretty awesome, too).

Going beyond stopping degeneration is the regeneration movement.  This includes: Regeneration International, an offshoot of the mighty Organic Consumers Association in the US; the UN Food and Agriculture Organisation FAO; Soil and More (Netherlands); People 4 Soils (Slow Food movement); and Save our Soils (UK).

Corporations like General Mills are taking strong initiatives.  They have 100,000 hectares of land from their supply chain to be organic by 2020 as part of their carbon reduction policy.

But we still burn food.  One half of the annual USA corn crop is converted to ethanol using more energy to produce it than is embodied in the ethanol. It is mixed with gasoline to be burned as fuel.  The US is now exporting oil and gas yet still burns vast amounts of food in the name of 'energy security.'

We still destroy forests.  According to HRH the Prince of Wales this is at a rate of 15 football fields per minute.  If we valued the carbon stored in those forests at $20 tonne each hectare would be worth $15000.  Once the forest is cleared and then planted with soybeans it is worth $300 per hectare.  HRH described this in a speech in 2008 as ‘The greatest example of market failure in the history of capitalism.’

We still burn wood.  There is a false virtuousness to burning wood.  200,000 wood burning stoves a year are sold in the UK alone.  Wood smoke is more harmful to health than smoke from coal, oil or gas.  It takes a tree 50 years to sequester the carbon that is then consumed in a wood burning stove in 50 minutes. If a replacement tree is planted, will take 50 years to take that carbon back out of the atmosphere.

Wood has the resilience of steel and the load bearing capacity of concrete.  'Glulam' and other new wood technologies mean that wood can be used in 20 story buildings ('plyscrapers'), sequestering the embodied carbon in the wood for centuries.  We should never burn wood, it's a terribly inefficient waste of carbon.

Biochar, or charcoal made from wood, is a way to convert wood by-products into a carbon rich substance that can be put in the soil and will stay there for decades or even centuries.

It dramatically increases the population of beneficial microbes in soil, delivering a healthier plant immune system,  increased water retention and reduced loss of nutrients from leaching.  It is the best use for woody material that is not suitable for building or furniture making.  It is proven to help restore degraded soils and make them fertile and fit for farming again.  There are many examples of its benefits: tomato growers use it to combat plant diseases and increase yields; it cures honey fungus, ash dieback, chestnut blight, phytophthora and other tree diseases; it helps cocoa farmers overcome the devastating impact of black pod.  Stockholm uses it for all their new urban tree plantings as it enhances survival rates.  In Qatar the Aspire Park now use it for all their new tree plantings, with gratifying results.  Biochar in soil protects the beneficial microbes that are part of a plant’s immune system, its food supply and it’s water supply.

Farming and forestry would be transformed if carbon pricing were to be introduced for their activity.   People would plant trees instead of growing wasteful biofuels.  Prairie grass would replace corn in the Midwest.  Farmers would adopt regenerative methods such as organic and biodynamic farming.

Farmers would profit from farming carbon in 2 ways:

  1. An annual payment for any increase in soil carbon and a charge for any decrease in soil carbon

  2. An 'interest' payment on the actual level of soil carbon on the farm. This would be effective at around 10% annually.

A typical organic farm would benefit to the tune of approximately £100 per hectare and an industrial farm would have to pay a carbon tax of as much as £100 per hectare.  Farmers would change behaviour overnight and agribusiness behemoths like Monsanto, Bayer and John Deere would have to rethink their business model.  Taxpayer-funded subsidies to farming could be largely phased out as carbon markets would trade the carbon credits.

Farmers could also insure against catastrophic events such as flood and drought that might impact on their soil carbon.   However, farming with carbon in mind would reduce the likelihood of such damaging events.

Soil is Nature’s capital and the foundation of all life on Earth.  Capitalism is about valuing capital and pricing it.  Capitalism has failed to deal with carbon because industry, transportation and farming have been allowed to pollute freely at no cost.  All other forms of pollution are nowadays strictly controlled for wider social benefit. It is time for carbon to be priced and traded like very other important commodity.

We can get 'back to the garden' - the Garden of Eden.  We just have to price carbon and change the way we farm our beautiful planet.

"We are stardust, We are golden

We are billion year old carbon

And we got to get ourselves

back to the garden"

My Salad Breakfast

This morning, for breakfast, I went into the garden with a couple of slices of bread slathered with mayonnaise and a rice cake smeared with Jersey butter. Then I proceeded to pick from my winter salad garden: lamb’s lettuce, French parsley, various Japanese winter veg including mizuna and two frilly but intensely hot mustardy greens, land cress (a thicket self seeded from a single plant earlier this year), lettuce, winter purslane and, for a touch of the bitters, artemisia – wormwood. I added a leaf of radicchio from plants that have sprung up through the brickwork of a path. Just as we think of ‘food miles’ there is a parallel concept of ‘food days’ from harvest to consumption. In this case it was ‘food seconds’ – the leaves barely knew they had been plucked before they disappeared into the welcoming warm darkness of my esophagus, still brimming with vitality as they headed for the acid bath of my stomach.  The garden owes everything to Rocket Gardens Winter Salad Collection, a superb collection of cold-tolerant plants that were delivered to me back in September, to get established before the cold set in. They haven’t been tested by frost (well, a very light one a few weeks ago) but my experience has been that my biochar-rich soil has such an active biology that the warmth it gives off acts as underfloor central heating for the plants. Soil is everything and I am lucky to have Carbon Gold at my fingertips, continually discovering new aspects of the joys of biochar gardening.

But enough about the soil, it’s the variety that gets me every time I have my salad breakfast.

Here they are, sharing a plate with a buttered rice cake and the lamb’s lettuce growing just behind.   But read on for the individual varietals and pictures.

Salad plate notated.jpg

Salad plate notated.jpg

Purslane.jpg

Purslane.jpg

I love the light mucilaginousness of winter purslane, with its spade-shaped leaves that look like they’ve escaped from a deck of playing cards.

Then there are the red chicories – radicchio and rosso de Treviso, both squeezing through the brick path. These provide a crisp bitterness.

radicchio.png

radicchio.png

The Japanese Red Frills Mustard leaves are hot and mustardy and satisfyingly crunchy. Here are the purple ones, finding space between the turnips and the spring onions.

IMG_1264 (1).jpg

IMG_1264 (1).jpg

And here are their green cousins, the Green Frills Mustard

Frilly Japanese greens.png

Frilly Japanese greens.png

The land cress is easily as peppery as its aquatic cousin

cress.jpg

cress.jpg

The Lamb’s Lettuce miraculously replaces removed leaves almost, it seems, overnight. Light in flavour and texture.

lamb\s lettuce.png

lamb\s lettuce.png

French parsley does the same, endlessly offering up new leaves to replace those plucked earlier.  Here it is in the foreground, with emerging Babbington’s leeks just behind.

parsley.png

parsley.png

Mizuna rounds it out, though it seems to be struggling more with the cold than the others.

Mizuna.png

Mizuna.png

A dab of Artemisia is always a good digestive tonic, but very bitter, so I get that down first and then follow with the sweeter and more pungent leaves.

YUM!

eating breakfast.jpg

eating breakfast.jpg

How to decarbonize a planet

Making the switch to organic agriculture on a global scale and turning waste biomass into biochar offers the real prospect of being able to reverse global warming, says Craig Sams

What’s happening out there? Is the world quietly going sane? A leading US Republican, Henry Paulsen, has come out strongly for action on climate change in the New York Times. For a political party that refuses to acknowledge burning fossil fuels can have anything to do with global warming, this is a tectonic event. Americans aren’t as stupid as their leaders think and are wising up to the fact that Hurricane Sandy was not God punishing us but to do with increasing atmospheric carbon dioxide levels.

The explosion of carbon dioxide in the atmosphere started around 1850 with the coal and steam-driven Industrial Revolution and the massive expansion of farmed land that was formerly wilderness or forest. My ancestors were part of this damage to the planet – great great grandpa Lars ploughed virgin prairie in Wisconsin, great grandpa Ole ploughed virgin prairie in Nebraska and grandpa Louis bought a tractor in 1926 so he could plough even deeper.

Every year the land they farmed gave up more of its life – losing ten tonnes of soil per hectare per year and as it decomposed, pumping tonnes of carbon dioxide into the atmosphere. They cut down a lot of trees too – which mostly went up in smoke. The same thing happened in Argentina, Brazil, Ukraine, Manchuria and the Punjab. We destroyed the soil that feeds us and filled the atmosphere with the gases that are cooking the planet.

Up to 1980 farming and fossil fuels were equally responsible for the increase in greenhouse gases; now fossil fuels are in the lead. But farming still emits more than ever. Every year 125,000,000 hectares of food-producing land give up the ghost – that’s 1.8% of the available land used up, farmed-out, lifeless.

The way forward is a carbon tax. How would it work? Every time you emit a tonne of carbon dioxide you pay the price – at the moment it’s around $15 per tonne. But once there’s a global market the price will go up. What does this mean for organic food? It will become cheaper than industrially-farmed food as organic farming uses half the fossil fuels to produce a given amount of food. Year after year it increases the carbon content of soil while industrial farms deplete it. The recent Rodale white paper (see story opposite) shows that if the world’s arable land and pasture was farmed organically the reduction in carbon emissions would be enough to cancel out ALL the annual increase in greenhouse gases. Rebuilding soils with biochar increases soil carbon and stimulates increased growth and extraction of CO2 from the atmosphere by crops. By farming organically and turning waste biomass into biochar instead of burning it we could reverse global warming. We would also eat less meat as it will cost a lot more when you include the carbon cost (vegetarians have a lower carbon footprint and vegans emit about a fifth of the CO2 per year of meat-eaters).

Add in the reductions in emissions from a transition to wind and solar and we can face the future with confidence and look our grandchildren in the eye instead of looking away guiltily because our shortsighted greed has robbed them of a secure future.

California has a carbon tax which has equivalence with Quebec’s; China has opened eight carbon exchanges in its key industrial regions; Europe has its Emissions Trading Scheme. Unilever and Pepsi have created the Cool Farm Calculator so the whole carbon footprint of a tub of Flora or a packet of crisps can be calculated precisely, and the food industry is picking up on it. The 2015 climate conference in Paris won’t be another failure – there are too many stakeholders who are determined to make it happen and have already achieved broad agreement on principles.

If the whole world farmed organically and ate organic food, reduced fossil fuel emissions, produced and shopped locally as much as possible, insulated houses, ate less meat and planted more trees, we could possibly face a global cooling crisis caused by sucking too much CO2 out of the atmosphere. But that’s a long way off, so let’s just put carbon back in the soil, where it does nothing but good.

By Craig Sams

Organic food pioneer and polemicist
Craig Sams is Britain’s best known natural food pioneer. He is the founder of Green & Blacks, a former Soil Association chairman and the author of The Little Food Book.

Soil Carbon: Where Life Begins

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pic1

Back in 1967 my brother and I ran an organic macrobiotic restaurant and food store – we followed macrobiotics, the way of eating described in the book Zen Macrobiotics by Georges Ohsawa. The restaurant bought as much as possible from organic producers around London so we built strong links with the Soil Association, which was founded by Lady Eve Balfour in 1946.   In order to talk about biochar I will first talk about soil, because that is the context into which biochar fits.   Satish Kumar also spoke about soil last year in his excellent magazine Resurgence.

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pic2

What is soil? Where did it come from? When life on earth began there was no soil, just rock. On and in that rock lived fungi that eked out a precarious living extracting carbon from the calcium carbonate of limestone. The atmosphere was mostly carbon dioxide and when it rained the rain became a weak carbonic acid solution that helped fungi to extract carbon from rock.

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pic3

The rock slowly broke down to sand, silt and the finest particles - clay. But there was no ‘soil’, no humus, none of the decomposing plants, organic matter and living organisms that define soil.

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pic4

Then a miracle happened

Tiny single celled organisms, ‘cyanobacteria’ (Latin for ‘blue bacteria’) developed the ability to take carbon dioxide and water and, with the help of sunshine, convert CO2 and H2O into simple carbohydrate: C6H12O6, or sugar. This was and is the fuel that powers all life on earth. The fungi saw their opportunity and locked the cyanobacteria into cells and strung them together in chain gangs.

Then they started to bundle them together in a form that we would recognise as plants

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pic8

 These strands of cyanobacteria became the earliest plants, such as horsetail

Plants were an efficient way to comb CO2 out of the air. The original plants didn't even have roots, the fungi had their own root system inside the plant to extract the sugar as soon as it was made. The plants were the root extensions of the fungi, not the other way round, which is how it appears today. Plants evolved with root systems and the fungi continued to keep their root network in the plant's root system. These fungi are called 'vesicular arbuscular mycorrhizal fungi'   ‘Arbuscular’ means 'tree-shaped' and reflects the form they take when the occupy the root system of a plant. 'Myco' means 'mushroom' and 'rhizzal' comes from rhizome and means 'root' - so they are ‘tree-shaped root mushrooms’. ‘Vesicular’ refers to the vesicles that are the storage areas where the mycorrhizae hold a stock of nutrients and sugar.

mycorrhizae

mycorrhizae

A plant will deliver in its sap from 10-20% of the sugar it makes in its leaves to the mycorrhizae, retaining the rest for its own growth. The mycorrhizae increase the reach of the plant’s roots by up to 10 times, penetrating soil that plant roots can’t access.

The ‘arbuscular’ shape of the fungus is shown in a root cell – this tree-like shape is a mirror of a root system – the fungus has its roots in the plant, the plant has its roots in the soil.

fungus

fungus

There are other organisms in the soil that live symbiotically with the mycorrizae. Most notable are the actinomycetes bacteria – originally they were thought to be fungi because they copied the form of fungal hyphae, with filamentous threads. With the advent of electron microscopes they turned out to be bacteria that had strung themselves together in chains in order to efficiently ferry nutrients to the mycorrhizae in exchange for sugar.   Most of our antibiotics come from soil bacteria. Streptomycin When a plant needs medicine, the mycorrhizae can farm it by feeding sugar to the bacteria that can produce that particular antidote – most commonly jasmonic acid, salicylic acid (aspirin) or ethylene. These medicines are sent up with the sap of the plant to provide it with immunity to fungal and insect attack.

One example of how mycorrhizae are used in farming is the French practice of ‘alley cropping’ where rows of fruit trees keep the fungal network going and enable crops planted in between to flourish rapidly thanks to the existing network of mycorrhizae supported by the trees. In Windsor Great Park an oak nursery accelerates the growth of oak saplings by raising them in ground surrounded by mature oaks – the big oaks provide the sugar to support a large mycorrhizal population. The baby oaks get sugar and nutrients from the mycorrhizae and grow away rapidly and healthily.

Soil is fascinating. It’s wonderful stuff. So what do humans do with it? Since the dawn of agriculture we mostly just kill it. Ploughing breaks up the neural network within the soil, though it reconnects fairly quickly but with a lot of casualties. Adding chemical fertilisers breaks up the symbiosis – the mycorrhizae no longer can exchange mineral nutrients for sugars because the farmers is providing them for free. The plant cuts off the sugar supply to the mycrorrhizae clustered around its roots and the mycorrhizae die off. Their 10,000 or so co-dependent microbial species also die off. The plant is then exposed to the challenge of fungi and other pests that give it nothing and just want to consume it. This creates the need for pesticides including fungicides, which further deplete the microbial population of the soil.

I have several generations of form in the area. My great great grandfather farmed virgin soil on the Koshkonong Prairie in 1842, cutting down trees and raising crops of grain and grazing cattle. My great grandfather farmed virgin prairie in Nebraska. These Norwegian farmers were notoriously stingy. They were frugal people in everything they did, they wasted nothing and recycled everything. Here’s an example:

Frugalism-Less is More

Frugalism-Less is More

My grandfather would deliver eggs from his chicken houses to the Safeway supermarket and other stores in Sioux City. He would then purchase tools, sugar, flour, salt, paper and other essentials that could not be produced on the farm. The flour sacks were made of calico, so the farmer’s wives would recycle the bags to make overalls for their boys and dresses for the girls.

Nell Rose flour company bags

Nell Rose flour company bags

Flour is a commodity – one bag of white dusty flour is just like the next. So the Nell Rose flour company marketing people got clever and printed nice floral patterns on their flour bags.

This appealed to people like my grandmother and she used Nell Rose flour to make the dresses for my mother (on the right) with her sister Thelma and their cousins.

Margie on the farm

Margie on the farm

This remarkable frugalism and avoidance of waste stands in stark contrast to the way that the soils of the Midwest were relentlessly wasted, often beyond recovery. Here there was no recycling, just relentless ploughing and harvesting, breaking down the soil. The farmer’s wives wasted nothing, their husbands wasted the fertile heritage of millennia. When land was ‘farmed out’ people would just move further west.

The original Louisiana Territory and adjacent territories embraced the great river network of the Mississippi, Ohio and Missouri Rivers, a 2000 mile wide water system draining into the Gulf of Mexico.

Original Louisiana

Original Louisiana

By 1925 more than 80% of the trees in this great river network had been cut down in order to create productive farmland.

trees cut down

trees cut down

Floods

Floods

The result was inevitable – the Mississippi Floods of 1927 were devastating – 27,000 square miles were inundated, up to depths of 30 feet. It triggered huge migrations of Afro-American farmers to Northern cities. Below Memphis Tennessee the Mississippi was 60 miles wide, 3 times the width of the Straits of Dover. The land was flooded from April to June.

This great flood was followed by further devastation. The weakened fractured soils of the prairie began to turn to dust and the winds blew up vast clouds of dust that reached as far as Washington DC, prompting Congressional action.   President Roosevelt created the Civil Conservation Corps and 3 million recruits planted 10 billion trees from Mexico to Canada to try to hold down the soil.

Dust bowl

Dust bowl

This destruction of soil happened also in Argentina, Manchuria, Ukraine, and other fertile breadbaskets around the world as tractors and chemical fertilizer accelerated the rate of soil destruction.

The greenhouse gases carbon dioxide, nitrous oxide and methane that were emitted accounted for half of all the increase in greenhouse gas levels between 1850 and 1980. Since then agriculture’s annual rate of emissions has continued to grow, but has fallen behind the astronomic rate of emissions growth from manufacturing, energy and transport.  But it is still responsible for at least one third of our excess emissions.

Emissions

Emissions

From 1850-1980:

Total CO2 from Farming:      160 Billion Tonnes

Total CO2 from Fossil Fuels: 165 Billion Tonnes

How can we stop this wasteful and environmentally damaging activity?

Part of the answer lies in a discover that was made nearly 500 years ago. When the Spanish conquistador Francisco Pizzarro was buy looting the silver and gold of the Incas he heard about cities of gold with even greater wealth. He deputed his brother and Francisco de Orellana to find these cities and to bring back their gold.

Orellano

Orellano

The parties were separated and Orellana could not return up river. The chaplain on his boat kept records of their travels. They encountered wealthy populations but were repelled by armed natives, led by fierce women warriors. These natives knew already that if you came close to a white man you would break out in red spots of measles or smallpox and then, because they had no immunity, die. They attacked and drove them away – Orellana described his boat as looking like a porcupine after one such attack. They called this region the Land of the Amazons and this is how the river got its name. When explorers sailed up the Amazon about 30 years later the wealthy civilisations Orellana had described were gone – wiped out by disease. People questioned whether the ‘El Dorado’ he had described ever really existed.

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pic18

Within the past 50 years archaeologists have found that the areas he described as populated coincide with areas where the soil is black to a depth of several metres - the ‘Terra Preta’ of the Amazon river settlements. Farmers who have Terra Preta have little need for fertilizer and even sell their soil to less fortunate farmers who are on the typical infertile jungle soils. The Terra Preta was made by the Amazons by taking all their waste, including animal bones and forest waste and domestic waste, piling it into pits, covering it with clay and setting fire to it. Once it was burning hot they’d cut off the supply of air and the material became charcoal and provided the growing medium for the next season’s crop.   The contrast between Terra Preta and soils of the forest is apparent when the land is cut away.

Terra Petra

Terra Petra

Brazilian farmers who farm on Terra Preta benefit from its fertility and crops like corn grow vigorously when planted in black earth. They sell it to other farmers and bag it up for sale in garden centres. It is what we now call ‘Biochar’ – charcoal for use in the soil rather than charcoal for use for barbecuing sausages.

So what is Biochar? What does it do?

Biochar provides a supportive environment for mycorrhizae and their associated microorganisms. This leads to a doubling or more of the microbial population that is the living essence of soil.

Biochar had a high surface area – a single gram of biochar can have twice the surface area of 2 tennis courts – this means there are lots of points where minerals can stick, each point has a negative charge, so it sticks to minerals with a positive charge – this stops the leaching of nutrients from soil, keeping it in the zone where it can reach the plant.

Biochar also helps retain moisture. The result is healthier plants, more nutrient availability, more water availability and better soil structure.

Biochar also reduces soil emissions of nitrous oxide, a greenhouse gas 300 times more harmful than carbon dioxide.

Biochar stays in the soil, too, for anything from 10 years to 4000 years, depending on the type of biochar, the soil type and the farming system. The scientific consensus settles around 1000 years. This represents carbon dioxide that is kept out of the atmosphere – most woody biomass ends up returning to the atmosphere by rotting or being burned. Thus biochar can be an important tool for reducing atmospheric greenhouse gas levels. It is estimated that recycling woody waste as biochar could remove 1 billion tonnes of CO2 annually from the atmosphere. Instead we burn it.

Biochar cell structure

Biochar cell structure

Biochar retains the cell structure of the original feedstock. So biochar from bamboo has larger pores, biochar from chestnut has small pores. But all those pores provide a refuge for mycorrhizae and a base from which they can expand even if they are disturbed by ploughing or by predators such as mites, protozoa or nematodes that feed on them.

Imagine the pieces of biochar as a ‘five star hotel’ for mycorrhizae or, even as Norman castles in the English countryside. Each biochar particle is a base for a contingent of mycorrhizae, helping them to weather the stresses and pressures of life in the soil.

We have an image of mushrooms as passive softies but they are much more than that. When nematodes that threaten a plant enter mycorrhizal territory they get more than they bargained for. The mycorrhizae attach to them with sticky substances that hold them fast, then insert their filamentous hyphae into the tiny worm and suck out its amino acids, providing protein for more mycorrhizal growth and nitrogen for ‘their’ plants. Some mycorrhizae form lassoes that are scented with fragrances that attract nematodes – the nematode pokes through the lasso that then snaps tight, holding the nematode while it is digested.

nematode

nematode

Mycorrhizae also oversee the production of insecticides and fungicides. When there is a threatening insect or fungal pest the news travels fast through the underground internet – the mycelial network. The appropriate preventive medicine such as jasmonic acid, salicylic acid or ethylene is produced and delivered via the plant’s sap to the threatened area. How is this done? We don’t really know but it is likely that the mycorrhizae simply feed more sugar to the bacteria that produce these defensive chemicals and then pass them over to the plant.

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pic22

It may be that the plant produces the defensive chemical itself or that it produces it in conjunction with the soil microbes. Both the plant and its supportive microbial community have a shared interest in defeating any disease threats quickly, before they have time to weaken the plant.

Biochar, by providing a resilient and abundant network of soil fungi and bacteria, is the framework of the plant’s immune system and helps it with nourishment and water.

So what have we done at Carbon Gold to turn this theoretical ideal situation into a reality?

biochar kiln

biochar kiln

The first thing we discovered was that the production method for charcoal was expensive, slow and inefficient – we wanted to reduce our carbon footprint in biochar production as much as possible and make it available cheaply to small farmers. We developed the Superchar 100 kiln.

It makes a 100 Kg batch of biochar in 8 hours instead of the usual 3 days. It delivers double the yield of traditional ring kilns. It has greatly reduced emissions – we recycle the gases emitted by the wood and burn them to heat the kiln contents instead of letting them escape into the atmosphere. They’re now hard at work in Belize, Botswana, Turkmenistan, Fiji, Brazil and the UK, with orders for more in the pipeline.

We also make a double-barrelled kiln that will produce 2 x 400 kg batches of biochar in a 12 hour day.

This one is part of a marshland regeneration project north of Perth, in Scotland

double barrelled kiln

double barrelled kiln

Whitmuir Organics, just south of Edinburgh, are making biochar for their horticultural operation and are experimenting with it in pig feed, where a small amount makes a big difference to pig health and feed conversion.

The first UK field trials of biochar were on my smallholding near Hastings in September 2010. We planted cabbages and winter lettuce in late September, some with biochar and some without. In November we had heavy snows and the lettuces were covered in snow for 3 days. When the snow melted the winter lettuces without biochar had died. Those with biochar were intact. I think this could be that a high microbiological population in the soil acts as underfloor central heating, biological activity generates heat and this is probably what saved the plants. We also discovered that biochar has no repellent effect on hungry pigeons, which destroyed the cabbage crop completely.

biochar field trials

biochar field trials

We work closely with Rijk Zwaan, the world’s 5th largest seed company and one that regards GMOs as an obsolete technology – they are world leaders at using natural breeding methods harnessed to genomic data. Their Field Trials Manager, Martin Kyte, stopped a comparative trial of Carbon Gold seed compost and peat compost after a few months because the results were so obviously in favour of our seed compost.

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pic26

And Fergus Garrett, head gardener at the marvelous Great Dixter gardens in Sussex, has switched to biochar.

Stephanie Donaldson, Gardening Editor of Country Living magazine, trialled Carbon Gold with lettuces. After one month the difference was significant:

In Belize one of our shareholders took 3 Maya cacao farmers to Cornell University in 2008. We studied biochar production and its use with Johannes Lehmann, the world’s leading authority on biochar and founder of the International Biochar Initiative. After that we helped the farmers build a simple kiln. They did trials and found that cacao tree seedlings raised with biochar outperformed those without biochar in the nursery. A $50,000 UNDP grant helped them expand production and recently the Inter American Development Bank funded the establishment of 9 new nurseries with a target of producing 45, 000 cacao trees to really expand cacao production. It normally takes 6 or 7 years for a cacao tree to begin to produce, with biochar it starts in 3 years – that makes a huge economic difference to a farmer who has invested in establishing a cacao orchard.

cacau

cacau

Belize: Biochar + Cacao = fruit within 3 years

Normal maturation time: 6-7 years

We’re also working with farmers in Africa.

In Ghana, where tomatoes retail at $12 per kilo, Sunshine Organic Farms are starting to grow tomatoes near the capital, Accra. Biochar will help ensure healthy abundant cropping.

In Ivory Coast cashew nut waste will provide a feedstock that can then be used on cashew trees and in Senegal it will be rice husks that provide the feedstock.

We have just shipped a kiln to Botswana. Farmers in Fiji are now making biochar with our kilns to improve their fertility and cropping.

Wight Salads grow more than half of the organic tomatoes sold in the UK every year. They have greenhouses in Portugal and the Isle of Wight. Last year they started using biochar from us. The results:  8% higher yield, 10% higher sugar content in the fruit, less watering and fertilizer cost and, most excitingly, a dramatic fall in the population of root-eating nematodes. They had a lower level of this pest in their organic biochar production than in their conventional production where they use nematicide to kill this damaging pest.

Wight Salads tomatoes

Wight Salads tomatoes

They were considering cutting back on organic tomato production because of these nematodes, but now they are going to expand.

nematodes2

nematodes2

Some nematodes work collaboratively with mycorrhizae, some eat them, some just eat plants and some provide food for the mycorrhizae when they venture too close to the plant the mycorrhizae are protecting. Once lassoed they are soon converted into nitrogen compounds

Biochar works wonderfully on turf as well. Forest Green Rovers Football Club trialled Carbon Gold last year and found that at the end of the season this year the treated part of the pitch had withstood the stress of weekly games and practice far better than the rest of the pitch. Last week they spread biochar over the entire pitch and their groundsman has helped initiate trialy by the groundsman at Emirates Stadium, home of Arsenal. Those trials will open up new opportunities on sports grounds everywhere and help reduce the use of nitrates and other chemical treatments.

We make products for gardeners too. These are available from some garden centres, but most of our sales come from our own website, other online retailers, QVC and Amazon. This is because biochar still takes a bit of explaining and garden centre staff are not always available or able to tell a customer about it.

Last year we worked with Bartlett Tree Experts, the Queen’s tree surgeons, on trials with Carbon Gold biochar. They successfully cured honey fungus and saw accelerated growth in horse chestnut seedlings. The results of their research were published in April in the prestigious Arb Magazine, the journal for members of the Arboricultural Association. An ash dieback trial they initiated last year has so far shown no sign of infection, but they are waiting until this October before publishing any results. They have endorsed our tree growth enhancement and protection range and are now offering it to all their customers.

Biochar to CO2

Biochar to CO2

We are not yet capturing the carbon offset value of using biochar, but it is now becoming available as a carbon offset of value. The conversion ratios vary – our own figure is based on making biochar in a Carbon Gold kiln and reflects the greater efficiency and lower carbon footprint of the Superchar range of kilns.

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pic37

In 2011 I visited the Green Party MEP Caroline Lucas in Brussels. She invited me back to present the biochar story to the Green Group of MEPs. In attendance were representatives from DG Agri and DG Enviro. They had a meeting after our meeting and the outcome was Eurochar. This programme funds research into biochar as a strategy for long term carbon sequestration and funds research into greenhouse gas mitigation with biochar.

Lady Eve Balfour lost the post war argument about the future direction of agriculture, but the Soil Association continued to fight the good fight while the introduction of subsidized nitrate fertilizer forced farmers into the industrial fold. The same process happened in the rest of the world and led to the Green Revolution, which is now running out of steam. Ten years ago there was a major collaboration to map out the future of agriculture in a world with diminishing resources and increasing population. WHO, FAO, UNDP, UNESCO, Defra, USDA, Monsanto and Syngenta were just a few of the global stakeholders who selected a crack team of 400 of the world’s leading agronomists to look at how we could reduce hunger, improve livelihoods and ensure social and environmental sustainability. 2 weeks before their report was published in 2009 both Monsanto and Syngenta went public by rubbishing its contents. Why? Because it said that the Green Revolution hadn’t delivered sustainable results, that genetic engineering was a dead end and that we should listen to small farmers and adopt traditional farming systems.

All of the other benefits of their proposals are summed up in rewarding farmers who prevent climate change. Whether you call it organic farming or agroecological farming, the fact is that farming in support of the living soil and its wonderful microbiological population is the only sustainable way to go. It is lower in carbon emissions and hugely effective in carbon sequestration. If only Lady Eve had lived to see this outcome that so firmly vindicated her predictions in The Living Soil published in 1943.

carbon farming

carbon farming

We are eating oil – it takes vast amounts of fossil fuel energy to make food energy and this is plainly unsustainable.

Farming Systems Trial

Farming Systems Trial

The Farming Systems Trial at the Rodale Institute in Pennsylvania has been growing the same crops side by side using organic methods and conventional methods. Once the health of the soil was restored, the organic crops matched conventional yields, showing greater resilience in years of drought.   Every year the organic soil added 1 tonne of carbon to the soil, while the industrial crops gradually lost it. The organic crops used 45% less energy.

Professor Pimentel at Cornell University mapped it out: organic farming could reduce atmospheric CO2 by 1.1 trillion pounds a year. That’s half a billion tonnes of CO2 – about 1/10 of the annual increase in CO2 equivalent. Add in biochar and you would get at least another half a billion tonnes, bringing down CO2 levels by 20% a year.

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pic41

If the cost of CO2 was factored into food production, then organic farming would deliver a € 350 per hectare cost benefit if carbon was priced at the real cost to future generations of €70 per tonne. Add in the benefit of €210 per hectare for every tonne of biochar added to the soil and agriculture could be part of the climate change solution instead of a major element of the problem. Lord Nicholas Stern quoted the figure of €70 per tonne in his book Blueprint for a Safer Future but a few months after it was published he said he was mistaken the real cost was €150 per tonne. Anyone who experience Hurricane Sandy in New York would probably agree. But even if CO2 was only priced at €35 per tonne it would deliver an economic imperative to farm organically and to use biochar universally. The Paris climate talks in 2015 will not exclude agriculture or transportation, the fatal mistake of the Kyoto protocols back in 1993. That will be when farming has to face reality and get a grip on its emissions.

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pic42

And not a moment too soon. Every year 125 million hectares of land become so degraded they can no longer reliably produce crops. That’s nearly 2% of the world’s arable land. We have replaced that lost land by cutting down forests, but that is no longer an option. We have to live within the means of our natural capital of soil and that means not spending it but saving it and building on it.

Public health will benefit too. Antibiotics saved millions of lives – they were derived from soil bacteria. Now, due to overuse in agriculture they have created resilient disease pathogens that can no longer be treated effectively with antibiotics. 80% of all antibiotic use is in agriculture, to keep animals alive that could not survive in the filthy conditions in which they are raised, on beef feedlots where they wallow in their own excrement or in pig and chicken farms where antibiotics are the only thing that keeps the animals alive during their brief lifespan.

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pic43

The sad thing is that industrial farming isn’t feeding the world. The world is feeding itself despite the waste and inefficiency of industrial farms.

70% of world’s food grown on farms smaller than 5 hectares

NO SUBSIDIES

30% of the world’s food grown on industrial farms

$350 Billion yearly SUBSIDIES

No wonder the IAASTD was so adamant that small farmers using agroecological and traditional methods were the only way to feed the world. They can produce up to six times as much per hectare as industrial farms, using fewer fossil fuel-based inputs and more human labour. Our taxes are being wasted on subsidising the destruction of our soils and dangerous increases in greenhouse gas emissions from agriculture. Only a carbon tax can reverse this.

As this is a Slow Food Eire event it would be remiss of me not to touch on the similarities between the microbiological health of the soil and the microbiology of its counterpart in us, the gut flora, whose product is often referred to as ‘night soil.’ One third by weight of what we excrete is the offspring of the gut flora that have multiplied on our food in our digestive system and pass out along with the digested food. There are clear parallels in function between mycorrhizae and actinomycetes bacteria in the soil and the lactobacilli and bifidobacteria and associated microbial forms in the gut.

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pic44

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pic45

We know that babies born by C section are likely to lack the microbial flora that are part of a healthy immune system. It’s now established that stool transplants in patients with clostridium difficile can save lives – 110,000 Americans a year die of this infection, which arises after antibiotic use.

In the soil, worms are a sign of good health. The emerging medical treatment of helminthic therapy reflects the finding that the absence of worms in the human gut is associated with diminished immune function. When an earthworm consumes soil containing actinomycetes bacteria, an important part of the soil’s immune system that produces antibiotic substances, it excretes six times as many as it ingests. Roundworms in the human gut consume food we eat and excrete cytokine, an immune booster.

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pic48

In Chinese tradition, Kwan Yin is the Goddess of Mercy and ‘mercy clay’ has saved millions from famine – it is rich in humus, minerals and microbial activity and can sustain a person when no other food is available.

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pic49

In Haiti the production of clay cakes is commonplace. Made with clay, salt and oil, they aren’t consumed to keep hunger at bay, they nourish and have special benefits for pregnant women as it prevents morning sickness. Clay helps eliminate toxins and infections.

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pic50

When one’s tummy is upset, particularly if traveling in foreign lands where a combination of different prevalent bacteria and different hygiene standards can lead to digestive disorders, charcoal tablets have the same beneficial effect on our digestive night soil as it does in the soil in which we grow our food.

I began this talk by quoting three people who have deeply influenced my thinking about soil and about its fundamental importance to our lives.

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pic51

I would like to close by quoting an even higher authority:

Genesis 3:19

"In the sweat of thy face shalt thou eat bread, till thou return unto the ground; for out of it wast thou taken: for dust thou art, and unto dust shalt thou return."

The soil’s living community provides an example to our society of how a cooperative community of plants and microorganisms can maximise and efficiently share the production of food derived from the abundance of water, sunlight and carbon dioxide with which our planet is blessed. We come from the soil and we return to the soil, we owe all life on earth to the soil.

We should never treat it like dirt

From Green & Black's to Blackened Greens

Here's the story of how I moved from dark chocolate to even darker materials - biochar

Back in 1995 the Prince of Wales delivered the Lady Eve Balfour Memorial Lecture on the theme of ‘Counting the Cost of Industrial Agriculture.’ He argued that if you incorporate the externalised costs of non-organic farming, such as nitrate pollution, gender-bending herbicides in the water supply, biodiversity loss and the climate change cost of greenhouse gases (from nitrous oxides and soil carbon emissions) the real cost of non-organic food would nearly double.

A year later Dan Morrell of Future Forests (later to become the Carbon Neutral Company) encouraged me to go carbon neutral with Whole Earth’s organic wholegrain cornflakes. The whole life cycle carbon footprint of the cornflakes was calculated by independent experts who found that it was surprisingly low: because organic farmers increase rather than reduce the stored carbon in soil, this offset much of the other carbon cost of the cornflakes.

By now it was pretty obvious to me that the sooner we could get policymakers to force us to include the cost of greenhouse gas emissions in the cost of food the sooner we would all be eating organic food, because it would usually be cheaper.

Roll on 14 years to 2009 – the climate negotiations in Copenhagen have soil carbon and forest carbon on the agenda. Lord Nicholas Stern, former chief economist at the Bank of England and author of the Stern Review that put the cost of every tonne of carbon we emit today at £140 for future generations (currently carbon markets value a tonne of carbon at £11) has said that any future climate agreement has to be ‘universal and equitable.’ In other words, no cheating, no get-outs, no let-outs, no sacred cows. That means that all countries and all activities, including agriculture, forestry and transportation must be included in the new climate regime that begins in 2012. Hitherto only Europe has complied and then only for the heavy industries that emit half of our greenhouse gases – farming and transport have been excluded. But no longer.

2 years ago I invited Dan Morrell to join me in a new venture: Carbon Gold. What do we do? For a start, we believe biofuels are part of the problem, not part of the solution. Every bit of biomass carbon is too precious to waste by burning it. At Carbon Gold we aim to capture woody material such as waste biomass, forestry co-products and tree prunings and convert it into charcoal. But we call it ‘biochar.’ Why? Because we don’t burn it, thereby putting the carbon back into the atmosphere as CO2. Once we’ve made the biochar we blend it with fertility-building clays and composts and add it to the soil. Biochar is a wonderful soil conditioner: it improves drainage but also prevents soil drying out; it reduces the leaching of nutrients from soil by rainfall; it provides 5-Star accommodation for beneficial soil fungi and bacteria, increasing their populations; it improves soil structure and aggregation; it helps suppress soil-borne diseases that are harmful to plants and biochar helps raise the pH of acid soils. Universities around the world are gearing up to do biochar research that will more precisely quantify its benefits. These vary depending on soil, climate and the amount of biochar applied to soil.

Meanwhile at Carbon Gold we are busily making biochar and selling the carbon credits from avoided emissions as well as selling the biochar as a soil improver. In Belize cacao farmers produce biochar that is blended with compost and used by banana growers to reduce their dependence on fungicides and irrigation. In East Sussex we are regenerating ancient chestnut coppice woodland and producing organic biochar which we use to produce “Gro-Char” peat-free compost which will be sold through garden centres. Garden Organic members will be trialling it in various applications during the 2010 season. In Mozambique we are partnering with a conservation organisation to help small farmers produce biochar, encouraging them to protect their forests and improve their soil fertility. On my own smallholding near Hastings there is a magnificent peach tree dripping with perfect fruit that had its base covered with biochar last February. The ones that didn’t get biochar haven’t done so well, peach leaf curl was worse for them. My biochar potatoes still show no signs of blight, while everyone else’s have suffered.

I feel like I’m still in the food business (and I have made a delicious risotto nero charbonara that delighted dinner guests recently), I’ve just moved my focus towards food security.