The rapidity with which paraquat is inactivated by adsorption on soil is responsible for many of its novel uses in crop husbandry. The same property is also valuable in water weed control. Paraquat, besides being readily absorbed into submersed plants, is also adsorbed onto soil particles suspended in the water and onto the mud at the bottom. Toxicity to fish is low under recommended conditions of usage, which are also designed to minimise the problems of water deoxygenation.
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