HELP Which of the following occurred at the Appomattox Court House?
1.The Civil War started
2.The Emancipation Proclamation was issued
3.The Confederate Army surrendered
4.The Dred Scott decision was announced

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.