Question

What is winnowing? ​

Answer 1

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Winnowing is an agricultural method developed by ancient cultures for separating grain from chaff. It can also be used to remove pests from stored grain. Winnowing usually follows threshing in grain preparation.

Answer 2

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$\implies$ The grains collected after threshing have some chaff which needs to be separated. This is achieved by winnowing. It is the process where grains are dropped from a height. The heavier grains fall directly to the ground, Wilde the lighter chaff blows away and collects at a distance.

After a harvest, crop stubs are often left behind in the field. These are usually burnt by the farmers. But a better option is to let the stubs remain in the fields after harvest. The stubs can help minimise erosion, return nutrients to the soil, increase the amount of organic matter, raise the water holding capacity of the soil, and also crub the growth of weeds.

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