I get a soil test every five years or so, and throw 4 or 5 bags of lime on each of my small plots each year, usually during the summer. With that, the pH has been in the low 6's every time I've done a test. Plots are 15+ years old and were disced each year up until three years ago when I went the no till route. The soil is fine sandy loam with an average annual rainfall of 63 inches.