Question

how winnowing is done​

Answer 1

Winnowing usually follows threshing in grain preparation. In its simplest form it involves throwing the mixture into the air so that the wind blows away the lighter chaff, while the heavier grains fall back down for recovery.

Answer 2

Winnowing is the simple method of cleaning food materials from a mixture. Winnowing separate the grain from the husk because one particle is light and the other is heavy . ... The chaff from a heap at a little distance from the heap of grains . This is process is known as winnowing. Examples are paddy (rice) and wheat .