<span>1000 acres of corn are grown by most farmers in greene iowa. This was like a revolution similar to industrial revolution in which the production of corn was increased 4 times by using some sort of fertilizer. Hence the corn was grown in such a bigger area covering 1000 acres of land.</span>
Well I don't know what era you're studying, but that's almost certainly false.
The minority groups are usually treated unequally by the dominant groups, as if there are say 90% White Caucasians and 10% Black Africans, the White Caucasians are likely to treat the 10% harshly as they're different.
The Jim Crow era directly followed the Reconstruction period in the United States history