Interesting. Big question is when did man begin to crudely cultivate. They probably realized very early that the pits from fruits or seeds from berries if placed in the ground sometimes resulted in new fruit bearing trees or berry plants. They probably could not stay to monitor or protect the cultivation due to the need to keep moving for hunting and gathering. However through trial, error and observation cultivation skills were acquired and they inevitably became knowledgeable about plant varieties, characteristics, grow times and nutritional values. However once they got the hang of productive cultivation, food became more abundant, populations grew rapidly, permanent settlements and civilization became possible. Of course the vast majority of people were eating diets that they were not optimal for their genetic blueprint. This incongruity will forever affect humankind.
The first iterations of agriculture came with food forests. Europeans discovered that the American Indians of both north and south america managed their forests.
North American indians burned the understories of forests to promote grass that provided food for herbivores.
South American indians of the amazon promoted whole forests dedicated to all kinds of fruits.
Examples of these old world food forests remain morrocco.
https://www.youtube.com/watch?v=NKIgqa49rMc