Where do we use winnowing?
Answers
Answer:
Winnowing is a farming method developed by ancient people for separting grains from chaff.
Explanation:
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Answer:
to free (grain) from the lighter particles of chaff, dirt, etc., especially by throwing it into the air and allowing the wind or a forced current of air to blow away impurities.
Explanation:
What is Winnowing?
Winnowing meaning is separation of grains from straw by the use of current of air. The word winnow is originated from old English word ‘windwian’ which means separation of mixture through wind.
Winnowing is based on the fact that if mixture is containing two components and one is lighter than another one, then both the components can be separated by blow of air. Mixture is allowed to fall from a height. Lighter component gets separated from heavier component due to wind.
Wind winnowing machines- It is said that first winnowing machine was developed by Andrew Rodger in 1737, in Scotland. He was a farmer and developed that machine for separating corn. He named the machine ‘fanner’. Then during industrial revolution, many types of winnowing machines were developed.
Example of Winnowing -
Wheat is separated from husk by using winnowing method. Wheat and husk mixture is allowed to fall from a height. Husk being lighter than wheat grains get separated from wheat because of wind or air blow.
Dirt particles can be removed from grains by winnowing.
Corns are separated from straw by winnowing.
Advantages of Winnowing -
Winnowing is very useful in agriculture.
We get grains and husk separate by winnowing, so husk can be used as food for animals.
We can separate grains such as wheat, corn, millet etc. from lighter impurities such as husk, straw, stones etc. by using winnowing.
Disadvantages of Winnowing -
This process of separating the components of a mixture does not work for heavier particles such as stones.
Since in winnowing the components of a mixture are separated with the help of wind, it is practically not possible to separate the components that are heavier than grains. Therefore, this process of separation of mixtures has a limited scope.
Also, winnowing machines are more efficient than manual winnowing.