Corn varieties are improving at about 1 bushel per year. Use current variety test information to help make your decision. Always treat seed corn. Wheat seed treatment is generally beneficial. Soybeans may not need seed treatment in non-stress conditions.
Seed treatment can improve some low germination seed.
Narrow rows usually increase yields for nearly all crops. Consider narrowing existing equipment to the limit and, as needs arise, purchase equipment for narrow rows. Narrow rows show the greatest advantage in late-planted crops such as double crop soybeans or grain sorghum. You can get narrow rows by doubling back with wide-row equipment. Average soybean yield in bushels per acre to drilled seeding at several Missouri locations.