Dhristi JEE 2022-24


There are various methods for separating substances such as handpicking, threshing, winnowing, sieving and magnetic separation. Once the crop matures or ripens, it has to be gathered. There are three significant steps to follow to collect grains. One, cutting the crop. Two, separating the grain from the stalks. Three, removing trash from greens. This can be done manually as well as with the help of machines. 

Manual threshing is done by beating the stalk against a hard surface. Appliances are also efficient, they can do both the cutting and threshing within some time. Hence, after combining the grain obtained, mixed with the remains of chaff and husk, clean greens are obtained by winnowing. 

A threshing machine or thresher is a piece of farm equipment that threshes grains that removes the seeds from the stalks and husks them. It was done by beating the plant to make the seeds fall out before such machines were developed. Threshing was done by hand with flails; such hand separation was terribly laborious and lengthy, taking a few quarters of agricultural labor by the 18th-century mechanization of the method. But, on the other hand, it removed a substantial amount of exertion from farm labor.

The first threshing machine was invented in 1786 by the Scottish engineer Andrew Michael. The subsequent adoption of such devices was one of the earlier examples of the mechanization of agriculture during the 19th century.


Threshers and mechanical reapers, bit by bit, became widespread and created grain production abundant, less effortful. However, the additional simple machines stay essential as Associate in Nursing applicable technology in low capital farming contexts each in developing countries and on tiny farms that try for exceptionally high levels of self-sufficiency. Moreover, pedal-powered threshers are a low-cost option. 

Let us elaborate on threshing. There used to be bundles of wheat or paddy stalks lying in the field after harvest. The farmer ties the stalks together to form bundles and then leaves the piles to dry in the sun. Once the stalks have completely dried, the farmer beats them against a hard floor to free the grains. This process of separating grains from stalks is known as threshing. Bullocks, oxen and machines known as threshers are also used for this purpose.

Book your Free Demo session
Get a flavour of LIVE classes here at Vedantu
Vedantu Improvement Promise
We promise improvement in marks or get your fees back. T&C Apply*
FAQs (Frequently Asked Questions)

1. What is the use of threshing techniques?

Threshing is the mechanism by which the edible portion of the grain (or another crop) is loosened from the straw it is attached to. It is a step in the preparation of grain after harvesting. The bran does not get separated from the grain by threshing. Using a flail on a threshing floor, threshing can be achieved by beating the grain.

2. What are the benefits of threshing machinery?

The advantages of the thresher include less physical labour and greater productivity (amount of grain thresher per amount of time). As compared to stomping or beating seeds, less seed breakage is also an advantage of using a thresher. There could be further breakage, however, it is not used properly.

3. Why is threshing done before winnowing?

Threshing is the grain separation process from the stalk on which it grows and from the chaff or device covering it. The edible portion of the crop is loosened in the process, but not the portion of the fibre. After harvesting and before winnowing, it is finished.

4. What is the difference between manual and machinery threshing? 

Manual threshing requires many farmers’ labor while machines need skilful and careful people to supervise. Manually it is a bit time consuming while machines don’t. However, separation of chaff requires proper care and skill, so it doesn’t really matter which is the best. If you have resources, machines are best, but if you want to stay close to the traditional art of threshing with animals and beating, you can go for it. To learn more about threshing and its way, look up to the Vedantu website for a detailed threshing journey and its examples. 

5. How many ways are there to separate substances? 

There are many ways to separate substances such as handpicking, winnowing, sieving, magnetic separation and last but not least, threshing. Each method is helpful in its own way, and each way requires its resources, and each has its own speciality. For example, hand-picking is best when the item is precious and minute. Magnetic separation is excellent when there are heavier goods to separate. Finally, threshing is a must because hand picking grains will take a lot of time, and you can’t risk having chaff in your clarified grains. 

6. How is a helpful threshing machine? 

In this century, doing it manually becomes a hassle for some people. Machines are time management friendly and less tiring, but it offers a similar product. And it can produce the product in mass and filtered. The first threshing machine was invented in 1786, decades ago, ahead of its time. It spread globally and became influential, gradually lessening the burden of separating manually—such a fine start of the art in those days. Thresher plays an important role and is very useful if used properly. When there are pretty helpful resources present, For example, hand-picking attractive, why would one neglect it? 

7. Why is threshing important? 

Threshing is the ultimate process of loosening or separating the edible part from the grains. The process takes place when the crops are mature enough to be separated. If not threshed on time, it would result in slow reproduction and growth.  

8. How to take notes on threshing? 

Threshing is a very easy and interesting topic. If you want to look more profoundly and detailed into this topic, you can indeed check out the Vedantu website to understand nicely and creatively.