I would make a narrow plot close to tree line, leave the rest tall grass toward the river. What I would do is bush hog the plot area as low as a cutter can, then disc it up. Yeah roundup always gets rid of grass seed, but I don’t use it on my plots, and have no problem as long as I plant heavy. I like wheat, oats, turnips, mustard greens. Don’t care for soy beans because if deer plentiful, they will go after the beans first, nip them off, then its dead, unless you fence off to protect till grown. There is a bean you can plant that will continue to grow after being nipped, forgot the name, will get it for ya. There’s also a plant called vetch that grows like a vine and leafy, really spreads. Never tried beets, but I see good things about them. Also, after disc’ing the plot, I would use lime, it will sweeten upthe plants. Lime is inexpensive and a great help. Use the granular type. Don’t till it in, leave on top of ground. If you do use lime, leave it about 2 weeks before planting, this is what our agriculture people recommend. I do recommend fertilizing about 3-4 weeks after seed comes up for better growth. You have to remember, the higher the number of deer you may have, will affect the new growth, and as you know, they will hit that plot as soon as the new growth heads out. Clover is always good, but those seed are $$. Not an expert on this, but have planted plots for 16 years. If you use clove, use Durana clover instead of Whitetail Institues clover, less expensive, last for 5-7 years. Also you can use a product called Barnapoli rape, which is kind of like the vetch, makes vines and is real leafy.