Climatefarming in northern Senegal

Definition Climatefarming en francais

Definition Climate Farming

Climate farming uses agricultural means to keep carbon dioxide and other greenhouse gasses from escaping into the atmosphere. Like organic farming, climate farming maintains biodiversity and ecological balance on productive, argicultural land. But climate farmers like Hans-Peter Schmidt go a step further and covert leftover organic mass into biochar, a solid carbon compound that can improve soil quality. Biochar production also creates a kind of gas that can then be burned to help generate power. A climate farm could grow food, generate power, and help keep carbon out of the air.

Climatefarming – Pour une agriculture durable

von Hans-Peter Schmidt

Le climatefarming est souvent décrit comme une méthode agricole au moyen de laquelle du CO2 est prélevé de l’atmosphère et stocké de façon stable dans le sol sous forme de carbone. Ceci pourrait permettre de freiner le changement climatique. Mais le climatefarming, c’est également un concept écologique durable pour l’agriculture du future, qui produira aussi bien des denrées alimentaires que de l’énergie et de l’air propre, encouragera la biodiversité et protégera le paysage.

Au travers de leurs feuilles, les plantes prélèvent du dioxyde de carbone contenu dans l’air et le transforment à l’aide de la lumière, de substances minérales et de l’eau en molécules carboniques. Lorsque la plante meurt ou pourrit, ou si elle est mangée et digérée, les molécules longues de carbone sont de nouveau scindées. Ce processus libère de l’énergie et donc du carbone qui, composé à plus de 99% de CO2, s’évapore dans l’atmosphère. (en savoir plus ...)

Google News: deforestation

Climatefarmingprojekt Öfen für Afrika

Mittwoch, 23. November 2011

Can 'biochar' save the planet? - CNN.com

read at: Can 'biochar' save the planet? - CNN.com

By Azadeh Ansari
CNN
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ATHENS, Georgia (CNN) -- Over the railroad tracks, near Agriculture Drive on the University of Georgia campus, sits a unique machine that may hold one of the solutions to big environmental problems like energy, food production and even global climate change.

Biochar's high carbon content and porous nature can help soil retain water, nutrients, protect soil microbes.

Biochar's high carbon content and porous nature can help soil retain water, nutrients, protect soil microbes.

"This machine right here is our baby," said UGA research engineer Brian Bibens, who is one of a handful of researchers around the world working on alternative ways to recycle carbon.

Bibens' specialty is "biochar," a highly porous charcoal made from organic waste. The raw material can be any forest, agricultural or animal waste. Some examples are woodchips, corn husks, peanut shells, even chicken manure.

Bibens feeds the waste -- called "biomass" -- into an octagonally shaped metal barrel where it is cooked under intense heat, sometimes above 1,000 degrees Fahrenheit, the organic matter is cooked through a thermochemical process called "pyrolysis".

In a few hours, organic trash is transformed into charcoal-like pellets farmers can turn into fertilizer. Gasses given off during the process can be harnesed to fuel vehicles of power electric generators. Video Watch how biochar is made and why it's important »

Biochar is considered by many scientists to be the "black gold" for agriculture.

Its high carbon content and porous nature can help soil retain water, nutrients, protect soil microbes and ultimately increase crop yields while acting as natural carbon sink - sequestering CO2 and locking it into the ground.

Biochar helps clean the air two ways: by preventing rotting biomass from releasing harmful CO2 into the atmosphere, and by allowing plants to safely store CO2 they pull out of the air during photosynthesis. See more about how biochar works »

"Soil acts as an enormous carbon pool, increasing this carbon pool could significantly contribute to the reduction of CO2 in the atmosphere," said Christoph Steiner, one of the leading research scientist studying biochar. "It gives us a chance to produce carbon negative energy."

Worldwide use of biochar could cut CO2 levels by 8 parts per million within 50 years, according to NASA scientist James Hansen.

Global carbon levels in the air have been steadily increasing at an alarming rate since the 1980s, according to NOAA. Since 2000, increases of 2 parts per million of CO2 have been common, according to NOAA. During the 1980s rates increased by 1.5 ppm per year.

The process of making biochar can also lead to other valuable products.

Some of the gases given off during the process can be converted to electricity, others can be condensed and converted to gasoline, and there are also some pharmaceutical applications for the by-products, said Danny Day President and CEO of Eprida, a private firm in Athens, Georgia currently exploring industry applications for the biochar process.

Although scientists look to biochar to improve the future, its origin lies in the past.

For centuries indigenous South Americans living in the Amazon Basin used a combination of charred animal waste and wood to make "terra preta," which means black earth, in Portuguese.

Thousands of years later, the terra preta soil remains fertile without need for any added fertilizer, experts say.

"These terra preta soils are older than 500 years and they are still black soil and very rich in carbon," said Steiner, a professor at the University of Georgia. Reducing the need for deforestation to create more cropland.

By using biochar concepts, terra preta soils have been proven to remain fertile for thousands of years, preventing further harmful deforestation for agricultural purposes. But still more large-scale tests need to be conducted before biochar technology can be rolled out on a global scale.

Day says biomass -- that otherwise would be thrown away --could be developed into entirely new markets for biofuels, electricity, biomass extracts and pharmaceutical applications, in addition to biochar.

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"We have 3 billion people out there who are at risk for climate change and they can be making money solving our global problem," said Day.

Industries can now begin to look at farmers around the world and pay them for their agricultural wastes, said Day. "They can become the new affluent."

All About Nature and the EnvironmentAlternative Fuel VehiclesAgriculture Policy

Freitag, 11. November 2011

Using Biochar to Boost Soil Moisture -- Environmental Protection

read at: Using Biochar to Boost Soil Moisture -- Environmental Protection

Using Biochar to Boost Soil Moisture

Scientists at the U.S. Department of Agriculture (USDA) are leading the way in learning more about "biochar," the charred biomass created from wood, other plant material, and manure.

The studies by Agricultural Research Service (ARS) scientists at laboratories across the country support the USDA priorities of promoting international food security and responding to global climate change. ARS is USDA's chief intramural scientific research agency.

Soil scientist Jeff Novak at the ARS Coastal Plains Soil, Water and Plant Research Center in Florence, S.C., is coordinating the multi-location effort. In one project, he led a laboratory study to see if different biochars could improve the sandy soils found on the Carolina coastal plain, and Pacific Northwest silt loam soils derived from volcanic ash.

Novak's team used peanut hulls, pecan shells, poultry litter, switchgrass and hardwood waste products to produce nine different types of biochars. All the feedstocks were pyrolysed at two different temperatures to produce the biochars. Pyrolysis is a process of chemical decomposition that results from rapid heating of the raw feedstocks in the absence of oxygen. Then the biochars were mixed into one type of sandy soil and two silt loam soils at the rate of about 20 tons per acre.

After four months, the team found that biochars produced from switchgrass and hardwoods increased soil moisture storage in all three soils. They saw the greatest increase in soils amended with switchgrass biochar produced via high-temperature pyrolysis -- almost 3 to 6 percent higher than a control soil sample.

Biochars produced at higher temperatures also increased soil pH levels, and biochar made from poultry litter greatly increased soil levels of available phosphorus and sodium. The scientists also calculated that the switchgrass biochar amendments could extend the window of soil water availability by 1.0 to 3.6 days for a soybean crop in Florence, and could increase soil water availability for crops grown in Pacific Northwest silt loam soils by 0.4 to 2.5 days.

Given their results, the team believes that agricultural producers could someday select feedstocks and pyrolysis processes to make "designer" biochars with characteristics that target specific deficiencies in soil types.

Donnerstag, 10. November 2011

7000 Jahre alte Böden als Weltretter - Mainzer Rhein-Zeitung - Szene - Mainzer Rhein-Zeitung

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7000 Jahre alte Böden als Weltretter - Mainzer Rhein-Zeitung - Szene - Mainzer Rhein-Zeitung

Mainz - Eine 7000 Jahre alte Technik könnte die erschöpften Böden rund um den Globus aufmöbeln und die Ernährung einer ständig wachsenden Weltbevölkerung garantieren. Mit dieser fantastisch klingenden These beschäftigt sich der Film "Rettung aus dem Regenwald? Die Wiederentdeckung der Terra Preta" des Mainzer Stadtschreibers Ingo Schulze.
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    Inmitten der Kaffeeplantage - Ingo Schulze (mit Hut) mit dem Kamarateam des ZDF in Brasilien.

    (Foto: ZDF)




"Das ist die Schlüsseltechnologie unseres Jahrhunderts", zitiert Schulze den Wissenschaftler Ralf Otterpohl von der Technischen Universität Hamburg-Harburg. Der 48-jährige Autor ist ins Gutenberg-Museum gekommen, um sein "Elektronisches Tagebuch" vorzustellen. Bei diesem 45-minütigen Streifen, den der Stadtschreiber jeweils in Zusammenarbeit mit dem ZDF dreht, haben ihn die Lektorin Christine Traber und Redakteur Thomas Hocke vom Sender unterstützt. "Das war ein Kampf mit dem Fernsehen, aber sicher auch mit der eigenen Unsicherheit", kommentiert Schulze die Arbeit an dem Dokumentarfilm.

Das Amazonasbecken galt lange als unberührte Wildnis, das Bild der Ureinwohner war von der Geschichtsschreibung des 19. Jahrhunderts geprägt. Erst in jüngster Zeit wurde diese Sicht korrigiert. Wissenschaftler fanden in der Region, die für ihren nährstoffarmen Boden bekannt ist, die Terra Preta, eine schwarze, höchst fruchtbare Erde. Bald wurde klar: Dies ist ein Kulturprodukt der alten Indios, doch das Wissen um ihre Herstellung schien verloren.

Forscher machten sich einerseits in den archäologischen Schichten, andererseits in den Labors und Gärten auf, um den Code der Terra Preta zu knacken. Einige, wie der Unternehmer Joachim Böttcher, glauben es geschafft zu haben. Er produziert mit der rheinland-pfälzischen Firma Palaterra bereits eine Version der Schwarzen Erde. Eine Mischung aus Holzkohle, Mineralien und Fäkalien gilt als Grundlage der Terra Preta.

Schulze und sein Team lassen in ihrem Film vor allem Fachleute wie Böttcher oder Otterprohl zu Wort kommen. "Wir haben ein paar Fragen notiert und damit unsere Protagonisten gequält", erläutert der Stadtschreiber. "Wir hatten nicht den Anspruch, ein Kunstwerk zu machen, aber schon etwas, das relevant ist." So kommt dieses "Elektronische Tagebuch" filmisch eher schlicht daher. Was mitreißt, ist die Kernthese vom ungeheuren Wert der Terra Preta für die Welt.

"Ich wusste, dass die Böden in Afrika oder Asien ein Problem sind, aber ich hätte nicht gedacht, dass auch in Deutschland die Verödung so dramatische Ausmaße angenommen hat", meint Schulze in der Diskussionsrunde nach dem Film. Terra Preta kann ein Ausweg aus der Misere sein, und Schulze will einen Teil dazu beitragen, dass sich die Idee von der schwarzen Erde verbreitet.

Schade nur, dass gerade mal 40 Gäste den Weg ins Museum gefunden hatten. Schade auch, dass der Film im ZDF erst nach Mitternacht läuft. "Wir sind todunglücklich", kommentiert der Schulze diesen späten Sendetermin. Gerd Blase

"Rettung aus dem Regenwald? Die Wiederentdeckung der Terra Preta" sendet das ZDF am Freitag, 11. November, 0.30 Uhr.

Biochar, terrapreta - Google News

soil carbon or biochar - Google News

"Biochartechnologies" via Joerg