I'll answer Yoder first. We have 218 acres total, with about 10 to 15 acres that are tillable.
Our situation is we are in totally wooded mountains, and the only other plots are on neighboring camps. No ag around by farming. Forest is a mix of 85% oak / maple / hickory, - - - with some pines, hemlock, birch, cherry, & poplar in the mix. We want to provide fresh green, nutritious stuff to feed and GROW deer all year long. Acorns are seasonal. Apples and crabs are seasonal.
We have established plots of Starfire red clover / 1015 Supreme alfalfa, a plot of Kopu II / Alice / Ladino white clover with some chicory, one of crimson and Persist red clovers, one of WR and WW, and one of PTT, DER, GFR, and Pasja forage brassica. Then we have 3 plots of RR corn ( standing ). We had a plot of BW that went to head and got polluted with foxtail. Turkeys are using that now. Those are what we have now at this moment.
I know the guys will want to plant more corn next spring. We'll plant BW again for sure - maybe we can mix something in with that ??
The plots with alfalfa/Starfire red clover and the white clover mix will stay as is for several years. Perennial plots.
We have probably another 2 to 3 acres that are not planted in crops now.
Brassica plot ( 1 acre ) will need to get something new. Med. red clover/oats/ peas of some sort ?? Welcome ideas.
Our WW/WR plot ( 3/4 acre ) is about 7 to 8" tall now, thick, lush and getting hit by deer. In our situation, what would you guys do with THAT come spring ?? All ideas welcome - nobody gonna pi$$ me off !!
With control over 218 acres it is very unlikely you will be able to "grow" deer from an antler size perspective in any measureable way. Age has a much greater influence on antler size than nutrition. Genetics are fixed. The only way to influence age class is to let young bucks walk. So, without cooperation from neighboring properties don't expect to influence antler size.
Converting 10 to 15 acres into quality food is enough to have a measureable impact on body size for the local herd. The first thing to determine is your major stress period. I would guess that in your area, winter would be primary.
The place to start is perennial clover. It provides more months of quality deer food than just about anything else I can think of. It is also one of the least expensive food plots to plant and maintain when you amortize the cost over the life of the plot.
Soybeans, as others have suggested, are the next thing I'd consider. The forage provides great nutrition in the summer and the pods in the winter. Corn is another high carb food that will carry deer through the winter when mast crops fail. Mixing them can work and make a great hunting plot. That is what I do, but strip planting them and rotating the strips each year will give you the most production.
The problem with soybeans is that in an area like you describe, unless your deer densities are low, beans can be wiped out before they are established. You asked about forage verses ag beans. Forage beans are bred to maximize forage production at the expense of pod production. They generally produce smaller pods. Ag beans are bred for the production of pods.
The question of which kind of beans to use comes down to your situation and objectives. If you are primarily concerned with winter, you want pod production. However if ag beans are killed by browse pressure, you won't get any pods. If you are primarily concerned with maximizing forage in the summer and/or need the browse tolerance, forage beans are the ticket. Which works better for you will be determined by your deer density and the number of acres you plant unless you invest in a temporary Gallagher-style E-Fence. This can protect beans during establishment. Even with high deer densities, if you plant a reasonable amount of acreage of forage beans, once they get ahead of the deer, deer can't seem to kill them. I had deer keep my Eagle beans naked all summer one year and still could not kill them.
In your case, you don't really need variety or attraction. When you are the only game in town, they will eat whatever you plant. The key is to make sure your quality foods are available at the times when quality native foods are scarce.
Good Luck,
Jack