Peas & Oats (common mixture for dairy farms to plant in early spring) would green up fast in the spring, and attract deer. I think 1/4 acre soybeans would not survive until the fall hunting season, the deer will eat them long before then. If you fence the deer out, you may have success with the soybeans lasting until hunting season. Round-up ready soybeans would certainly help you control the weeds in your plot. Next year, consider planting winter rye (grain) into your soybeans in September. They will stay green all winter, and grow very early in the spring.