General Comments Markets were weak overnight with soybeans showing the greatest weakness. Wheat was firm and eventually traded sharply higher. Corn traded mixed much of the session and closed nearly unchanged. It was another volatile session -- especially in the soy complex, where prices traded sharply lower last night, rallied to 5-6 cents higher after a friendly Informa soybean production estimate, but faltered late and closed 14 cents lower. Volume was light to moderate in corn and soybeans and heavier in wheat.Southern Hemisphere weather is affecting the wheat markets as too little rain across Australia has analysts trimming back their wheat production estimates. Too much rain across Argentina is starting to have an adverse impact on...