As Mike Krueger noted yesterday, among the 1 June quarterly stocks estimates that USDA will release this Friday, 29 June, the quarterly corn stocks number is far and away the most important to the market. With 2011/12 old crop corn in apparent tight supply, this number is what analysts and traders will focus on. And the importance of the corn stocks grows as dry weather conditions and stressful heat across the Corn Belt threaten to turn the outlook for an enormous 2012 U.S. corn crop into something else.Part of the attention that will be focused on the 1 June corn stocks estimate stems from the pattern of erratic quarterly corn stocks estimates that go back nearly 18 months. Estimating how much corn is being used on a quarterly basis is u...