The harvest of this year’s U.S. corn crop is about 90 percent complete, and it is going to be a bin-buster. If it surpasses 2009's astonishing 13.1 billion bushels, it could become the largest in U.S. history. American farmers are growing more corn today than at any time in the past, and the trend is accelerating. The last five years have brought us five of the largest corn crops ever. Where to store the stuff is becoming an issue: When the bins and elevators are full, the corn is simply piled on the ground. Bankers are saying that we are experiencing the best farming environment in decades.