Define the terms:
(ii) threshing, and (iii) winnowing.
(i) Harvesting: The cutting and gathering of mature food crop like wheat or paddy is known as harvesting.
(ii) Threshing: The process of removal of the grains of harvested crop from the chaff is called threshing.
(iii) Winnowing: The process in which grains are separated from chaff with the help of wind is called winnowing.