Presentation is loading. Please wait.

Presentation is loading. Please wait.

Mystery Soil of the Amazon Amazon Basin, Brazil Soil Minerals Climate Change ConfrontingOxisol predominant Amazon soils acidic notoriously infertile very.

Similar presentations


Presentation on theme: "Mystery Soil of the Amazon Amazon Basin, Brazil Soil Minerals Climate Change ConfrontingOxisol predominant Amazon soils acidic notoriously infertile very."— Presentation transcript:

1 Mystery Soil of the Amazon Amazon Basin, Brazil Soil Minerals Climate Change ConfrontingOxisol predominant Amazon soils acidic notoriously infertile very low carbon poor nutrient capacity Terra Preta Local farmers prize Terra Preta yields three times greater than adjacent infertile tropical soils sustained fertility in intensive use dug up and sold as potting soil dark earth (Portuguese) click to continue

2 Small Patches average: 20 hectares (50 acres) average: 20 hectares (50 acres) up to 350 hectares (865 acres) up to 350 hectares (865 acres) near settlements & on bluffs near settlements & on bluffs cultural debris cultural debris animal & fish bones embedded pottery sherds embedded pottery sherds Age years radio-carbon dating (charcoal) recent research: 6000 years dark earth (Portuguese) Amazon Basin, Brazil Soil Minerals Aerial Surveys 10% of total land area able to feed 5-10 million people Terra Preta click to continue

3 High Microbial Activity microbial reef Soil Food Web High diversity, high stability Nitrogen-fixing bacteria High Nutrients Cation Exchange Capacity (CEC) Calcium (+) Phosphorus (-) Nitrogen (+ / -) High Carbon up to 9% compared with.5% in other soils sometimes over 20% two to six feet deep most carbon is charcoal dark earth (Portuguese) Amazon Basin, Brazil Charcoal Soil Minerals reduced carbon Terra Preta click to continue

4 How did Amazon natives create these remarkably fertile and productive soils? How did these soils sustain their remarkable productivity for five centuries? What can we learn from these soils to sustain soil productivity today? Can this way to create these tropical soils give insights to improve temperate soils? Can this sequester carbon in soil to help reverse global warming? Charcoal Soil Minerals reduced carbon Terra Preta click to continue

5 suck CO 2 fixed into transform into boost soil fertility photosynthesis restore Soil Biology grow more pyrolysis inoculate out of Earths atmosphere Carbohydrates plant biomass Biochar sequestered carbon positive feedback loop In tropical Amazon, replacing slash & burn with slash & char can create sustainable soil fertility initiate permanent agriculture end rainforest destruction Organic Farmer Orleans, Massachusetts Robert WellsConfronting Climate Change Can this work in our temperate climate? our question is: Any strategy to increase arable land, and improve productivity & yield on existing arable land should receive research priority. Terra Preta heavy Amazon clayCape Cod beach sand click to continue

6 suck CO2 fixed into transform into boost soil fertility photosynthesis restore Soil Biology grow more pyrolysis inoculate out of Earths atmosphere Carbohydrates plant biomass Biochar sequestered carbon positivefeedbackloop Can this work in our temperate zone? our question is: click to continueConfronting Climate Change


Download ppt "Mystery Soil of the Amazon Amazon Basin, Brazil Soil Minerals Climate Change ConfrontingOxisol predominant Amazon soils acidic notoriously infertile very."

Similar presentations


Ads by Google