This is my personal feeling and no way scientific.
I prefer corn.
Soy beans are good early but the deer seem to taper off as the beans get closer to harvest.
The deer to tend to hang up in the corn, but then again, corn seems to attract more deer. If you can find a travel route in and out of the corn, you should be able to score big. Deer will often travel along side the corn if there is adjoining cover, ie a trail between the corn and the woods. Now if you can locate an alfalfa field near by and find a trail that leads from corn to alfalfa, you can be it will be a hot location as they love alfalfa and will frequently travel back and forth.
My opinion.