Defoliation has an enormous impact on the value of a cotton crop. Good defoliation is necessary for a good harvest job, and good harvesting is required for the gin to be able to produce the highest turnout, quality, and value. Once trash gets mixed into seed cotton, part of it will be in the bale when it gets to the textile mill. Gins can remove significant amounts of trash, but the final leaf grade of the bale is also affected by defoliation and harvesting.