The breaking off of U.S.-Chinese talks late last week led to what appeared to be market exhaustion overnight and early Monday morning as new contract lows were set. But in a reversal, prices pulled themselves up and well above those lows by Monday’s close. That technical signal and USDA’s report late yesterday afternoon, which showed the U.S. pace of U.S. spring planting was slower than expected and far behind average, sent a heretofore tired bearish market off and running. Grain and soy prices gapped higher to open last night’s trade, and they stayed sharply higher overnight and throughout today’s trade. Soybean futures contracts were up nearly 36 cents at their session high, and they retained most of that gain by...