Not sure if this is the right place for this question. If you know of
a better place for it, please do tell me.

The Question: I assume that when a certain site is used for a long
time as a vineyard, there will be some typical changes in ground
chemistry due to leeching of deposition effects of the plants. Some
might also come from fungicide treatments, or similar. What might
these typical 'signatures' be? If I'm trying to find out if wine was
planted on a field sometime in the last 100 years or so, what would I
look for?

Any literature references are greatly welcome.