chapter  27
54 Pages

Nitrogen Transformations

Farmers since ancient Chinese and Roman civilizations have practiced crop rotation with legumes to increase soil fertility and agricultural productivity. However, the science behind such practice was revealed by Boussingault who experimented with leguminous crops xing N2 in 1838. In 1886, Hellriegel and Wilfarth showed denitive evidence for N2 xation by microbes in legumes.