If there was one area of agreement for nearly all crop watchers, it would be that this year’s mixed-up and adverse weather made it very unlikely that 2017 corn and soybean yields would reach trend line levels. Then came the August WASDE.During most U.S. corn and soybean crop cycles, the game of guessing what the national average yields will be gets underway sometime in early July. Guesses are modified thereafter by central U.S. weather conditions and perceptions about their potential impact, positive or negative, on crop development and production. The first real input from USDA/NASS comes in the August WASDE, which includes the initial yield estimates that are based mainly on farmer surveys and plant populations. Also included are estimate...