I am no pro, and I am not exactly clear what the question was, but I will give my opinion.
If we are comparing a field with low ph, and one with a good ph, the field with good ph will draw and use more nutrients from the soil, therefore in many cases, the plant will taste better for the deer in the plot that has the higher ph that could use more of the nutrients. For an example with just N, my brassica plot wont get much action until I put down the midgrowth N a few weeks after planting, at that point, the deer come in and hammer them.
If the question was why a field would not attract deer that has the same low ph, as the surrounding land, compared to a separate area that had higher ph in the field, and in the woods that surround it, (if that makes sense, because I kinda confused myself typing it) my guess is certain plants have a sweet spot that make the plant taste better for deer. So for an example sugar beets have a sweet spot of 6.5-7ph, if your land and surrounding areas all have soil in the sweet spot of 6.5-7 and you plant sugar beets, those sugar beets will taste much better to the deer, then if your land, and surrounding lands have a ph of say 5.5, or say 7.5, because it is out of the sweet spot for that plant. Which may explain some of the preferences we see for what deer like around different areas.
In my area the normal ph is about 5.7, so if I fix my ph to 6.7, and plant sugar beets, you can be almost assured that the deer will like them, and prefer almost anything I plant in my plot, to what is surrounding my plots. Which is a big draw for the deer. What is growing in my plots will most likely take up more nutrients then the areas surrounding my food plots with lower ph. To even be more of a draw, if I amend my soils with the proper amount of nutrients, including micro nutrients, I can make plants taste even better for the wildlife.
But, as I said, I am not a professional, so I may be just talking out of my butt, but this is my thoughts.
