One theory in the "evolutionary development of ag" was one of "Protection of plant resources within a fixed migration zone". This one seems reasonable because we know that, as a population of hunter gatherers increased, they either had to range farther and wider or else get a sense of "Seasons" and the natural bounty presented in those areas. So migration patterns of paleoliths included the "protection" of fruit groves and sources of fruits.
Exactly. Such practices of protecting or encouraging the growth of specific species are still in evidence today among some hunter-gatherers. Eg replanting a specific tree after cutting one.