 She later played an important role in Brazil's soybean production by encouraging a reliance on varieties that solely depended on biological nitrogen fixation.As a consequence of her research and ideas, numerous soybean plantations in Brazil are now completely supplied for nitrogen (N) by rhizobia and not using any N-fertilizers.This movement has had big benefits, because Brazil, together with the U.S., are the main producers of soybean in the world (ca.