SELECT * FROM question_mgmt as q WHERE id=4328 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=12 AND subId=16 AND chapterId=364 and ex_no='1' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 8th science Crop Production and Management write a paragraph in your own words on each of the

Question:

Write a paragraph in your own words on each of the following.
  (a) Preparation of soil                 (b) Sowing
  (c) Weeding                                (d) Threshing

Answer:

  1. Preparation of soil: The steps which are taken by a farmer before sowing are collectively known as preparation of soil. It involves tilling or ploughing, levelling and manuring. It bring the nutrients rich soil to the top so that plants can use these nutrients.
  2. Sowing: The process of putting seeds in the prepared soil is called sowing. It is the most important and precious part of the crop production. Before sowing, the healthy and good quality of seeds are selected. The seeds should be sown at appropriate distances and depth. Seed drill is the best method of sowing seeds in the fields.
  3. Weeding: The removal of unwanted plants that grow along with crop plants is called weeding. It is necessary since weeds complete with the crop plants for water, nutrients and light. Hence, they affect the growth of the plant or crop. Some weeds may be poisonous or harmful for animals and human beings.
  4. Threshing: The process of separating the grain seeds from the chaff is called threshing. Threshing is carried out with the help of a machine called ‘combine’ which is infact a harvester as well as a thresher.


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