Corn production in many states of the Midwest is limited by nitrogen levels in the soil. Some farmers reduce the need to apply expensive anhydrous ammonia to their fields by rotating corn crops with nitrogen-fixing soybean crops. Using soybeans to add nitrogen to soils is an example of
A) biological augmentation.
B) the biomass pyramid.
C) promoting leaching efficiency.
D) bioremediation.
E) trophic efficiency.

Question

Quizplus · Accepted Answer

Using soybeans to add nitrogen to soils is an example of biological augmentation, as it involves the introduction of living organisms (soybeans) to improve the productivity of the soil.

Corn Production in Many States of the Midwest Is Limited