Im suggesting and at the same time asking if the land on wich you farm is eventually going going to deprave on nutrients becouse if this was a function in the game (wink, wink), it would lead to more stratigical farming like the 2 year crop rotation wich only planted crops on hallf of the land and leaved the other half to recover.
And last, what kinds of soils are their going to be in the game and what factors are going to depend on the soil, and is their going to be soil quality, (wich is related to my first point) like the amunt of nutrients and other components like the sediment size.