Why is grain production in the Great Plains considered largely unsustainable?
A)The energetics of crop production in the Great Plains are such that more energy is needed to grow the crops than can be gotten from the crops.
B)Competition with cattle ranching is resulting in a decline in crop production.
C)More and more people are becoming gluten intolerant,so there will be less and less demand for wheat,barley,and rye.
D)The Ogallala aquifer is being depleted for irrigation water.
E)So many pesticides are needed for grain production that streams in the Great Plains are becoming dead zones.

Question

Quizplus · Accepted Answer

The depletion of the Ogallala aquifer, a major source of irrigation water for grain production in the Great Plains, is considered largely unsustainable as it may lead to a decline in grain production in the future.

Why Is Grain Production in the Great Plains Considered Largely