What is adaptive at one time may not be at another.In the Central Plains of the United States,a principal region for grain cultivation,irrigation systems and chemical fertilizers have resulted in ___________________________________.

Question

Quizplus · Accepted Answer

The use of irrigation systems and chemical fertilizers in the Central Plains has resulted in large crop yields, but these methods are often unsustainable and can have negative long-term effects on soil health and the environment. Therefore, what was adaptive at one time (increasing crop yields) may not be adaptive in the long term.

What Is Adaptive at One Time May Not Be at Another.In