What does "farmland stood idle" mean?

Brainliestttme : ) which of the following nations were among members of nato during the cold war? soviet union and west germany west germany and poland west germany and the united states france and east germany

How did the invention of the cotton gin affect slave labor in the united states? a. there was a forced migration of slaves from the south to the north. b. slave-owning cotton planters were gradually forced to sell their plantations. c. more slaves were purchased to work on cotton plantations in the south. d. the reduced need for labor on cotton plantations led to a decline in slavery. e. slaves were moved from cotton plantations to sugar plantations.

Approximately how many americans, from both the north and the south, were killed in battle during the civil war?