User:Alua Koblan/Weeds

Weeds are wild plants that grow in cultivated fields. There are more than 300 species in Kazakhstan. It grows on arable, Meadow, pasture lands, on river and Lake banks. The weed uses a lot of moisture, nutrients due to the good development of the root system. It also obscures the grafted crop and impairs the course of photosynthesis, resulting in organic matter throughout the grafted crop. the formation of substances deteriorates, the resulting product decreases. Weeds are home to crop pests and pathogens and are the breeding ground for them. The seeds and fruits of some weeds (menduana, domestic wheatgrass, yellowtail) poison humans and animals. Weeds do not germinate at the same time as hand-sown crops, but are able to survive in the soil for a long time. In addition, many weeds are resistant to adverse environmental conditions (cold, heat, drought). The weed is mainly divided into two groups: parasitic weed and non-parasitic weed. The parasitic weevil includes weevil, falconry, etc. The most harmful is the Falcon, which does not have chlorophyll and roots. It sucks out the nutrients of the crop next to it. Non-parasitic weeds are divided into annual plants (Black oats, egret, rye barley, black menduana, etc.) and perennial plants (lying wheatgrass, Ermen, Chenail, common turkeys, etc.). Agrotech for weed removal. careful implementation of measures (good cleaning of sown seeds, sprinkling of manure, weeding before flowering, application of crop rotation, high-quality soil treatment, loosening of row spacing of crops, etc.), Chem. herbicides (avadex, iloxan, etc.) spray and Biol. effective use of methods.

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