Farmers used to say, “If you are going to buy a farm, do it at the end of summer.” That simple country wisdom comes from years of dependence on the rhythms of Mother Nature. Experience had taught them that a farm--or any kind of land, really--will give you a better picture of its potential and the opportunities and challenges it poses at the end of the growing season but before frost. If you're looking at buying farm land, here are some things to look out for as the seasons change.