What is winnowing, sieving, threshing, hand picking

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Solution

Sieving is the process which allows fine particles to pass through the holes of the sieve, while the bigger impurities remain on the sieve.
The process of seperation of grain from husk and hay with the help of wind is called winnowing.

Hand picking is a method of seperation of slightly large sized impurities like stones, insects etc.

The process of seperating grains from sun-dried stalks is called threshing.

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Question 4
The term used for the process of separation of grains from the chaff is called
(a) sieving
(b) threshing
(c) winnowing
(d) hand picking

Q. Define the following with an example:
(i) Hand-picking
(ii) Winnowing
(iii) Threshing
(iv) Sieving

What is the difference between threshing and winnowing

Question 6

While preparing chapatis, Paheli found that the flour to be used was mixed with wheat grains. Which out of the following is the most suitable method to separate the grains from the flour?

(a) Threshing

(b) Sieving

(d) Filtration

Q. Threshing and winnowing are post harvesting agricultural practices.

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