I Have used baking soda and lemon juice or vinegar to do ph of water for 2 or 3 years with no problems at all i use ph up and ph down now because it seems easier and takes less to raise or lower it. The is a green house by me that is all they use big jugs of vinegar and a case of baking soda for growing food and fruit trees with. Generally any thing that makes corn or tomatoes grow good will work for weed.
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