What is winnow machine?

A winnowing machine is a type of agricultural tool that separates grains or seeds from unwanted materials like chaff, stalks, and husks. The machine works on the principle of air current where the grain and chaff mixture is thrown up in the air and the air current separates the lighter chaff particles by blowing them away, leaving behind the heavier grains.

Winnowing machines can be operated manually, by using a hand-crank or pedal to create the necessary airflow, or by mechanical means, such as using a fan or blower to generate the airflow.

The use of the winnowing machine significantly increases the efficiency of the grain cleaning process, reducing the time and effort required to separate the grain from chaff. Winnowing machines have been used extensively in agriculture for thousands of years, and their design and methods of operation have evolved over time.