Droughts come, and droughts go. The past two months have provided a very clear object lesson in this, as the western drought continues to be slowly erased, while key grain production areas in the Plains and Midwest see drought conditions emerge and expand. According to the latest U.S. Drought Monitor, released March 23, about 36% of the contiguous U.S. is experiencing conditions ranging from D0 (abnormally dry) to D3 (extreme drought). Higher-than-normal…