ENV100Y5 Lecture : env100 note 52.docx

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28 Mar 2012
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ENV100Y5 Full Course Notes
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Outline: what is biochar, how is biochar produced, environmental benefits, soil improvements, climate change and energy production, pollution, food security, my research. Terra preta do indio-- if you read the text books, it shouldn"t be here! : an anomaly in the tropics, typically soil is, red and yellow soil, highly weathered, acidic, low in organic matter, low in essential nutrients. What did they find: thousands of burial urns and ceramic pieces (date back 2000 yrs 7000yrs, terra preta found on low hills overlooking rivers, 70% more charcoal than adjacent soils. To test if charcoal was the culprit: a trial was performed on the infertile soils of the amazon by adding various treatments of charcoal and nutrients. In two years, treatments of charcoal and fertilizer grew as much as 880% more than plots with just fertilizer alone! Improvement of soils: mitigation of climate change, energy production, reduction of environmental pollution, food security.

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