I have bought a stump remover for KNO3 and it has the numbers 13-0-44, which i have heard is pretty good. I was just wondering, how pure is it? and also if i could remove those impurities. I have tried making BP with it and it didn't do much. lots of excess sulfur and charcoal was left over, so...
Well I've found this recipe to extract Potassium Nitrate from nitrate bearing potting soil containing 0.09% nitrate nitrogen and I've also found this one soil (well its more like rocky gravel) for turfs that contains 9.00% nitrogen nitrate. Okay so my question is can i extract the one with 9.00%...