Q 4. Write a paragraph in your own words on-
(a) Preparation of soil
The preparation of the soil is the first step before growing a crop. It is to turn the soil and loosen it. This allows the roots to penetrate deep into the soil. The loose soil allows the roots to breathe easily even when they go deep into the soil. The loosened soil helps in the growth of earthworms and microbes present in the soil. These organisms further turn and loosen the soil and add humus to it. In this way, various nutrients in the dead organisms are released back into the soil. These nutrients are again absorbed by plants.
Since only a few centimeters of the top layer of soil supports plant growth, turning and loosening of soil brings the nutrient-rich soil to the top so that plants can use these nutrients. Thus, turning and loosening of soil is very important for the cultivation of the crop.
The process of loosening and turning of the soil is called tilling or ploughing. This is done by using a plough.