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wsF^ General-Contact Weed Killers • • • are not selective. They destroy all kinds of vegetationboth weeds and crop plants. C^T hese herbicides are used to control unwanted plant growth along highways, rights-of-way, and fence lines, and around farm and industrial buildings. Sodium arsenite has been the chemical most commonly used for such purposes, but it is dangerous to humans and livestock. It is now being replaced by new sprays which are nonpoisonous, cheap, and easily applied. |^f There aredoi:10.5962/bhl.title.59345 fatcat:5rv26rizobed5cn2vpyj2lkx4a