Humans have dramatically altered the rate of nitrogen fixation into forms usable by autotrophs _______________
A)because of the erosion of farmlands through poor agricultural practices
B)by selectively removing leguminous plants
C)by using antibiotics to reduce the numbers of denitrifying bacteria
D)due to the burning of fossil fuels to meet our energy needs
E)by producing synthetic fertilizers and applying them to crops, lawns, and parks

Question

Quizplus · Accepted Answer

Humans have increased nitrogen fixation primarily through the production and application of synthetic fertilizers, which convert atmospheric nitrogen into forms that plants can use.

Humans Have Dramatically Altered the Rate of Nitrogen Fixation into Forms