What do you understand by threshing?

Threshing

1. It is the process of loosening the edible part of the grain or seeds (or other crops) from the straw and chaff to which it is attached. 

2. It is the next process after harvesting in which stems and chaffs of wheat or paddy are separated from the grains.

3. The process can be done manually by beating it on a solid surface or by using a threshing machine.

4. Stalks or stems of crop plants and the chaff are soft material whereas the grains themselves are very hard, therefore after striking it the heavy hard grains get detached from the soft stalks.