The separation of grains from husk is done by the process of winnowing.

Winnowing is a traditional method used for separating grains from their husks or chaff. It is a simple and effective process that has been used for centuries by farmers all over the world.

Process of Winnowing:

1. Step 1: Threshing
Before winnowing, the process of threshing is carried out. Threshing involves the removal of grains from the stalks or ears of the plant. This is usually done by beating or striking the plants to loosen the grains.

2. Step 2: Winnowing
Once the grains are separated from the stalks, the next step is winnowing. In this process, the grains are thrown up in the air while a gentle breeze is blown. The wind carries away the lighter chaff or husk, while the heavier grains fall back down.

3. Step 3: Collection of Grains
The grains that have fallen back down are collected in a clean container, while the chaff is carried away by the wind and separated from the grains.

Reasons why winnowing is used:

1. Separation based on weight
Winnowing is based on the principle that the grains are heavier than the chaff or husk. When the grains are thrown up in the air, the wind carries away the lighter chaff, leaving behind the heavier grains.

2. Cost-effective
Winnowing is a simple and cost-effective method of grain separation. It does not require any complex machinery or equipment, making it accessible to farmers in rural areas who may not have access to modern farming techniques.

3. Efficient and quick
Winnowing is a relatively quick process and can separate a large quantity of grains in a short amount of time. It is an efficient method that has been used for generations to separate grains from husk.

In conclusion, winnowing is the process of separating grains from husk or chaff. It is based on the principle of separating based on weight, where the lighter chaff is blown away by the wind while the heavier grains fall back down. This method is cost-effective, efficient, and has been used for centuries by farmers around the world.

Winnowing is the method in which the grains from the husks through the wind . The heavier objects fall down and the lighter objects fly away from the wind.