Got a soul test done and it shows low levels of nitrogen and sulphate. Nitrogen is easy fix,my question is how in bust sulphate. My PH s ideal for my situation 6.7 so I don't think I want to use elemental sulpher, as that would lower PH. I know Gypsum is a option but I have a medium high level of calcium already and don't want to over do that. Are there any other options iam not concidering?