Trading in grain and soy complex futures resumed Monday evening, and prices began to firm after a hesitant start. More of the same prevailed during the day session as one particular trend led to some of the buying. General Comments Trading in grain and soy complex futures resumed Monday evening after the long holiday weekend, and prices began to firm after a hesitant start. The trend during years of big crops, which is that seasonal lows often occur just before serious harvesting gets underway, led to some of the buying. There were also concerns that Midwestern corn and soybean crops are facing two weeks of dry weather as they finish their growing season, a development that could possibly shave something off yield prospects. The corn crop...