Sometimes soil changes in a field. You'll have clay at one end and sand at another. Sometimes two different soils will run up next to each other and you can tell where they transition. Occasionally its really freakin obvious.
lilfarm is in the piedmont of North Carolina...we grow food...we sell it...we have two weekly markets and a CSA...lots of acres 1 busted tractor 2 dogs 300 chickens, and an amazing goal of one day turning a profit.