We commented yesterday that if USDA's 1 March corn stocks estimate were to present the kind of erratic surprise that has become an established pattern for quarterly corn stocks, the corn stocks number would either be bearish or wildly bullish. USDA's quarterly 1 March corn stocks estimate held firmly to that pattern with a bearishly large number. Estimated corn stocks as of 1 March 2013 were 5.4 billion bushels, which is a huge 400 million bushels larger than average trade expectations. This quickly sent old crop corn futures contracts down the 40-cent daily limit.Based on USDA's 1 March corn stocks, about 2.630 billion bushels of corn were used during the second quarter (December-February) of the 2012/13 corn year. By interpolation after...