Over the past three decades, tropical forest clearing and burning have greatly altered the Amazonian landscape by increasing the cover of pastures and secondary forests. The alteration of biogeochemical processes on these lands is of particular interest on highly weathered Oxisols that cover large areas in the region because of concerns regarding possible nutrient limitation in agricultural land uses and during forest regrowth. The objectives of this study were to quantify (1) the reaccumulation of nutrients in biomass of secondary land uses, (2) changes in soil nutrient contents, (3) internal nutrient cycles, and (4) input–output budgets for the landscape mosaic.
The Rise of Brazil's Globally Connected Amazon Soybean Agriculture
The Rise of Brazil's Globally Connected Amazon Soybean Agriculture
Tractor-trailer truckslin e up along a red and muddy earthen road. Large vinyl tarpaulins secured by ropes cover the open-topped hoppers of each one. Truck drivers hang out and prepare simple meals using stoves and kitchen utensils contained in a compact box built...