While on the last measurement date soil in the fallow plots did have an additional 4.5 inches of water carryover compared to wheat, this may not be of much benefit. During the three previous falls, fallow has been wetter than wheat by similar amount: 4.6 inches (3-yr average). Yet by following spring, the difference had decreased to only 0.7 inches (3-yr average). These data illustrate the inefficiency of fallow at providing additional water for a subsequent crop.