biological nitrogen fixation वाक्य

उदाहरण वाक्य

1. Some scientists believe that widespread biological nitrogen fixation, achieved mainly through the use of cover crops, is the only alternative to industrial nitrogen fixation in the effort to maintain or increase future food production levels ( Bohlool " et al . " 1992, Peoples and Craswell 1992, Giller and Cadisch 1995 ).