How deep for a soil sample?
I'm planning another food plot in addition to my current .75 acre clover plot. The area I'm planning to plant has a western exposure, so it gets a fair amount of sunlight mid-late day. It's entirely pasture, but hasn't been farmed/planted in 30 years (therefore, no lime or fertilizer in those past 30yrs). I want to get soil test done, but never got around to it (or had plans for the plot) in the fall before frost set in. How deep down do I need to get for the sample to be worth my while?