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Harvesting

Cutting of crop after it matures is called Harvesting*.

Cutting the crops after it has ripened and gathering the grains is known as Harvesting.

  • Cereal crops usually take 3-4 months to mature.
  • In India, many festivals are associated with harvesting, such as Pongal, Baisakhi, Holi, Diwali, Nabanya and Bihu.

Harvesting can be done manually (using sickle) or by machine (called Harvester).

  • A sickle is used for cutting the crop. Harvester is a machine that helps to cut the ripened crop from the fields.
  • Threshing is the process of separating the grains from the straw and chaff. A thresher is used for threshing.
  • Winnowing is a process in which we allow natural wind to blow through the grains so the lighter grains fly away, whereas heavier grains fall to the ground
Winnowing                                                                                        Threshing                

Winnowing

After harvesting, separating chaff from grain can be done through threshing and winnowing.

Threshing is separating chaff from grain by beating the crop against a stone or wooden bar. In this process, grains fall from the stalk due to force.

After threshing, winnowing separates the husk from the seeds by blowing air through it. In this process, the husk (which is lighter) flies away and the seeds (which are heavier) fall down.

There is a machine called ‘Combine’ which works as a harvester as well as a thresher. 

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