I am confused about a result i got back. it says the soil has a ph of 7.7, but the buffer is NA. I thought once you get about 7.5 or more you should add sulfur to lower the ph? also, the soil is high in calcium 82%, slightly low in organic matter 2.5, and slighly low in potassium 1.44%. how much sulfur should be added if any, why hasn't the lab told me this, and should i worry about the calcium being so high?