Topic outline

    • Crop Production and Management

      Q23. Why proper storage of crop products is important?

      Ans. Proper storage of crop products is important to prevent them from spoilage.


      Q24. Give some examples of Kharif crop.

      Ans. Examples of kharif crops are Paddy, maize, soyabean, groundnut, cotton, etc.


      Q25. What are the benefits of eating fish?

      Ans. Fish is good for health. We get cod liver oil from fish which is rich in vitamin D.

      Q26. How do fertilisers help farmers?

      Ans. The use of fertilisers has helped farmers to get better yield of crops such as wheat, paddy and maize.


      Q27. How are crops categorised in India?

      Ans. In India, crops can be broadly categorised into two types based on seasons - rabi and kharif crops.


      Q28. How is harvesting done in India?

      Ans. Harvesting in our country is either done manually by sickle or by a machine called harvester.


      Q29. What is winnowing?

      Ans. After threshing, grains are separated from chaff with help of wind. This process is called winnowing.


      Q30. List some festivals that are associated with the harvest season.

      Ans. Special festivals associated with the harvest season are Pongal, Baisakhi, Holi, Diwali, Nabanya and Bihu.


      Q31. What is crop rotation?

      Ans. Crop rotation is a method of replenishing the soil with nutrients by growing different crops alternately.

      Q32. Why should excessive supply of water to plants be avoided?

      Ans. Excessive supply of water to plants should be avoided because roots get damaged and the plants die.


      Q33. Why some seeds float on water?

      Ans. Damaged seeds become hollow and are thus lighter. Therefore, they float on water.


      Q34. Why does farmer rotate crops in the field?

      Ans. Farmer rotates crops in the field because crop rotation helps in the replenishment of the soil nutrients.


      Q35. What are the different sources of irrigation?

      Ans. Sources of irrigation: The sources of irrigation are— wells, tubewells, ponds, lakes, rivers, dams and canals.


      Q36. What is the right time to spray weedicides?

      Ans. The weedicides are sprayed during the vegetative growth of weeds before flowering and seed formation.


      Q37. How is threshing carried out?

      Ans. Threshing is carried out with the help of a machine called ‘combine’ which is in fact a combined harvester and thresher.

      Q38. What are the advantages of using manure in crop fields?

      Ans. The use of manure improves soil texture as well as its water retaining capacity. It replenishes the soil with all the nutrients.


      Q39. In summer, the frequency of watering is higher. Why is it so?

      Ans. In summer, the frequency of watering is higher due to the increased rate of evaporation of water from the soil and the leaves.


      Q40. Why does the loosening of soil allow the roots to breathe easily?

      Ans. Loosening of soil allow the roots to breathe easily because air fill up the spaces between the soil particles and provides airy soil to the roots.