What was the benefit of crop rotation?
a. different crops could be grown on the same land.
b. more land was needed to plant crops.
c. crops could be separated into different fields.
d. land could remain unplanted for long periods of time.

The correct answer is A, as the benefit of crop rotation was that different crops could be grown on the same land.

The crop rotation consists of alternating plants of different families and with different nutritional needs in the same place during different cycles, avoiding the soil to be exhausted and that the diseases that affect a type of plants to be perpetuated in a determined time.

In this way the fertilizer is better used (by using plants with different nutrient needs and different root systems), weeds are better controlled and problems with pests and diseases are reduced (since no host is found, is more difficult to survive).

on the morning of  july 21,  1861, general mcdowell ordered the  unionarmy to attack. it was on this hill that  confederate  colonel thomas jackson and his forces held back theunion  troops.