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9.What are weeds? How can we control them?in nroner order tn make a flow chart of |
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Answer» Weeds are unwanted plants. They grow with crops and compete for nutrients and water with the main crop. So weeds are very harmful. (i) The manual removal includes physical removal of weeds by uprooting or cutting them close to the ground, from time to time. (iI) Tilling before sowing of crops helps in uprooting and killing of weeds, which may then dry up and get mixed with the soil. (iiI) Weeds can also be controlled by using certain chemicals, called weedicides like 2, 4-D. |
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