Oxalic acid can not be used to weed

Q: The 133****7919 mobile phone sent a message: Can oxalic acid be used for weeding? How much is better?

Answer: Oxalic acid, oxalic acid, is the simplest dibasic acid. Oxalic acid can complex with iron and other metal elements to form water-soluble substances, so it has the function of rust removal. Oxalic acid is found throughout nature and is often found in the cell membranes of plants such as barberry, marigold, sorrel, and sorrel in the form of oxalate. Almost all plants contain calcium oxalate. Excess oxalic acid is also harmful to weeds, but it is not used for control of farmland weeds in production.