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We use herbicides in the cultivation of agricultural plants; chemical preparations are used in the fight against weeds. Herbicides are divided into inorganic and organic according to their chemical composition, herbicides that selectively affect and affect depending on their exposure to crops and weeds. Herbicides are used before planting, during planting, during the period of growth and after harvesting, depending on the specifics of the crops and foreign grass. They are sprinkled on top and by the way of a ribbon. Herbicides, which are sprinkled on the leaf before planting, are mixed in the soil with boron Wormwood. At the time of planting and during the growth period, they are sprinkled with a ribbon method or top.  Biotic factors (dew, wind, temperature) are also important in the use of herbicides. 
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