With reference to harvesting, consider the following statements: 1. Threshing is the process of sowing seeds into the soil. 2. Winnowing is a method used by farmers with small landholdings to separate grain from chaff. 3. A 'Combine' is a machine used exclusively for irrigation. Which of the statements given above are correct?

The correct option is (b). Explanation Harvesting involves cutting a crop after it has matured. Following the harvest, grain seeds must be separated from the stalks and chaff through specific mechanical or manual processes known as threshing and winnowing. Statement-wise Analysis: - Statement 1 is Incorrect. Threshing is the process of separating the grain seeds from the chaff or stalks. It is performed after harvesting. Sowing is the distinct agricultural process of planting seeds into the soil. - Statement 2 is Correct. Winnowing is a traditional method used to separate heavier grains from lighter chaff. It utilizes wind or blowing air; the lighter chaff is blown away while the heavier grains fall vertically. This method is typically used by farmers with smaller landholdings. - Statement 3 is Incorrect. A 'Combine' is a large agricultural machine that integrates two major processes: harvesting (cutting the crop) and threshing (separating the grain). It is not used for irrigation purposes. Key Takeaway: Threshing separates grain from stalks, whereas winnowing separates grain from chaff using air currents. A Combine harvester automates both harvesting and threshing.

With reference to harvesting, consider the… - NCERT Class 8 Science MCQ

NCERT Class 8 Science — Chapter 1: Crop production and management

mcqeasy

With reference to harvesting, consider the following statements:

Threshing is the process of sowing seeds into the soil.
Winnowing is a method used by farmers with small landholdings to separate grain from chaff.
A 'Combine' is a machine used exclusively for irrigation.

Which of the statements given above are correct?

NCERT textbook question

From NCERT Science - class 8 · Page 10

Options

A1 only
B2 only
C1 and 3 only
D1, 2 and 3

Did you get this right?

Solution

The correct option is (b).

Explanation

Harvesting involves cutting a crop after it has matured. Following the harvest, grain seeds must be separated from the stalks and chaff through specific mechanical or manual processes known as threshing and winnowing.

Statement-wise Analysis:

Statement 1 is Incorrect. Threshing is the process of separating the grain seeds from the chaff or stalks. It is performed after harvesting. Sowing is the distinct agricultural process of planting seeds into the soil.
Statement 2 is Correct. Winnowing is a traditional method used to separate heavier grains from lighter chaff. It utilizes wind or blowing air; the lighter chaff is blown away while the heavier grains fall vertically. This method is typically used by farmers with smaller landholdings.
Statement 3 is Incorrect. A 'Combine' is a large agricultural machine that integrates two major processes: harvesting (cutting the crop) and threshing (separating the grain). It is not used for irrigation purposes.

Key Takeaway: Threshing separates grain from stalks, whereas winnowing separates grain from chaff using air currents. A Combine harvester automates both harvesting and threshing.

Your note

More from Chapter 1: Crop production and management

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