From Ancient Farmers, Lessons for Today's Amazon

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This is the VOA Special English Agriculture Report , from http://voaspecialenglish.com | http://facebook.com/voalearningenglish South America's Amazon is the largest tropical rainforest and river system on Earth. But the Amazon is disappearing at the rate of about eight hundred thousand hectares a year. This deforestation is caused by an increase in agriculture and cattle ranching and the building of roads and dams. Another cause is the illegal cutting of trees for logging companies. Now, a new study says ancient Amazonian farming methods could offer valuable lessons for today. The study looks at the pre-Columbian period. Christopher Columbus and other European explorers began arriving in the Americas in the late fourteen hundreds. The researchers studied a coastal wetland area where ancient farm beds and canals remain unchanged. The site is in French Guyana. A widely held belief is that pre-Columbian farmers used a great deal of fire to manage Amazonian ecosystems. But the scientists say their study calls this idea into question. It shows that raised-field farmers limited their burning to improve agricultural production.Jose Iriarte from the University of Exeter in England was lead author of the study. Mr. Iriarte says fire results in the loss of important nutrients for crops. When land is not being used for farming, periods without fire are most effective in rebuilding soil organic matter and preserving soil structure. "So in this sense," he says, "we interpreted that they

Published 2012-05-17 · Watch on YouTube ↗
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