Is there any reason to know the Cation Exchange Capacity? OK, I know that a high CAC is better, but my land is what it is. Will knowing the CEC be of any practical value? My soil is neutral sandy clay, with a PH of about 7, and it grows good grass (as does most of the midwest!). I am interested in raising some veggies, and so I am looking to fertilize it. The soils out here are almost a little low in NPK, and so is mine. But, will knowing the CEC help me any? Thanks!