Here is what I think from my own expirence. At this time of year the deer have plenty of natural food without needing to feed on food plots,etc. Also removing the corn might have also down it because..#1. the deer were probably drawn to the corn and since they were walking through the food plot any way they would stop and eat awhile. And #2. the cover was probably and added bonus. Another thing I have seen around the farms I visit frequently is that the deer are more interested in the beans if food is plentiful because the plant really does have as many nutrients as the bean. But they still love soybean plants as well. My opinion would be just give it time and later in the summer to fall you probably will see the same number of deer grazing your plot as years before. If not I have no idea where they went LOL