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Question

With respect to the following statements, choose the correct option.

(i) Winnowing is a time-consuming process for separating grain from chaff.
(ii) Fodder cannot be recovered by the process of winnowing.
(iii) Threshing is loosening of grain from chaff.
(iv) Traditional methods do not involve threshing.


A

Winnowing machine

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B

None of these

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C

Both of these

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D

Harvesting machine

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Solution

The correct option is B

None of these


Wind winnowing is an agricultural method developed by ancient cultures for separating grain from chaff. It is also used to remove weevils or other pests from stored grain. In its simplest form, it involves throwing the mixture into the air so that the wind blows away the lighter chaff, while the heavier grains fall down for recovery. Since it is done manually, it is a tedious process.
The process of loosening of grains or seeds from the husks and straw is called threshing. It is a preliminary step in chaff removal, which is done before winnowing. There is no fodder loss in the process of traditional winnowing. However, modern equipments used for threshing cause subsequent fodder loss.


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