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| it depends who requirements you are trying to meet. if you meeting japan requirements, I think it is joa or something like that, no manures, period. For the us requirements, you cant use over 20 percent of nutrients requirements of plants by use of chilean nitrate. you can use potash sulfate, if mined from cetain sources, also kmag natural, not the regular kmag, has be the natural forumula. my brother refers to the organic certifiers and the organic mafia, jump through there loops or else, even if it doesnt make a lot of sense. | |
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N-sources for organic
