To prevent racial integration from occurring at the university of alabama, governor blocked the door to the institution.

To prevent racial integration from occurring at the university of alabama, governor  George Wallace blocked the door to the institution..
George  Wallace was known one of the biggest supporters for the Segregation. He believed that white and minorities students should never be allowed to study in the same room.

The changes to agriculture in the united states since 1900 is that increased mechanization has increased food production, thereby increasing the need for labor. there has been an increased need for higher speeds of food production due the fact that the population in the united states continues to rise.