JB cant help you on post #2, but RR soybeans are 28.80 per 50# unit and one unit will about plant an acre, RR corn is about 110. and it will plant 3 acres. I would not integrate the seed, you really cant, each requires a different plate in your planter, I would plant them a strip of beans strip ob sunflowers , strip of corn, then alternate again and , remember the sunflowers are not RR, , lay your field out in the width of strips based on the width of your planter, then plant all your corn , it goes in first , then couple weeks later the beans go in, then the sunflowers, believe me the sunflowers probably wont get very high if you have a lot of deer, I hope this layout was understandable.....