write a answer in two-three short lines.
Please answer this picture.
Answers
Answer:
Please mark me Brainlist
Explanation:
5th answer is in attachment.
6. What is irrigation? Describe two methods of irrigation which conserve water.
Soln:
The supply of water to crops at regular intervals is called irrigation. Methods of irrigation which conserve water are
a) Drip Irrigation: Here the water goes drop by drop directly into the roots this method is very useful as it conserves the water and also helps in avoiding weeds.
b) Sprinkler system: This method is in use in mainly uneven land where sufficient water is not available. The perpendicular pipes, having rotating nozzles on top, are joined to the main pipeline at regular intervals. When water is allowed to flow through the main pipe under pressure with the help of a pump, it escapes from the rotating nozzles. It gets sprinkled on the crop as if it is raining.
7. If wheat is sown in the Kharif season what would happen? Discuss.
Soln:
Wheat crops may get destroyed if sown in Kharif season because of unfavourable temperature, pests and adaptable conditions for the plants to grow. Kharif come during the rainy season, hence it is not a wise idea to grow wheat in Kharif season.
8. Explain how soil gets affected by the continuous plantation of crops in a field.
Soln:
Plants require nutrients for their growth. Without optimumnutrients plants will die. Continuous plantation of crops results in depletion of certain nutrients like Nitrogen, Phosphorus, Potassium etc. This results in the decrease of yield due to loss of nutrients hence there should be a gap between crops in order to get a good yield.
9. What are weeds? How can we control them?
Soln:
In a field many other undesirable plants may grow naturally along with the crop. These undesirable plants are called weeds. Weeds can be controlled by methods called weeding. Tilling before sowing of crops helps in uprooting and killing of weeds, which may then dry up and get mixed with the soil. Weeds are also controlled by using certain chemicals, called weedicides.
