What was the significance of the second agricultural revolution ?

The Significance of the second agricultural revolution, was it involved the introduction of new crop rotation techniques and selective breeding of livestock, and led to a marked increase in agricultural production. It was a necessary prerequisite to the Industrial Revolution and the massive population growth of the last few centuries.

Not being allowed to serve

Explanation:

During the first half of the war African Americans were not allowed to serve, as the war wasn't about freeing the slaves, it was about preservation of the Union. It wasn't about slaves until Lincoln wrote the Emancipation Proclamation.