The cutting of the crop after it is mature is called harvesting. In harvesting, crops are pulled out or cut close to the ground. In India, most of the harvesting is done manually and sickle is the only tool that is used for this purpose. The process of beating out the grain from the chaff is known as threshing. the threshing of paddy is done by beating the harvested crop with sticks, whereas in case of wheat and other crops threshing is done by treading the crop with a team of animals such as bullocks and buffaloes. After threshing, the chaff and hay are separated from grain by putting the threshed material before a good natural breeze. The process of separating the grain from chaff and hay with the help of natural breeze is called winnowing.