What is the difference between a democrat and a republican?

One of the differences between democrats and republicans lies in their views towards social issues. The Republicans tend to be conservative on social issues. They tend to oppose gay marriage and promote marriage being between a man and a woman. They also oppose abortion and promote the right of gun ownership.

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.