Question

"Combine - Harvestor," is a popular farm machinery used for the following purpose(s) in rice and wheat crop farming:

• A. Harvesting only
• B. Harvesting and Threshing
• C. Weeding
• D. Land leveling

Hint:

To remember the functions of a combine, think of the "3 R's" (though winnowing is part of it): Reaping, Threshing, and Winnowing.
It is most economical for large-scale monoculture farming.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
A combine harvester is a versatile machine designed to efficiently harvest a variety of grain crops.
The name "combine" comes from its ability to combine three separate harvesting operations into a single process.

Step 3: Detailed Explanation:
The machine performs the following functions simultaneously:
1. Reaping: Cutting the standing crop in the field.
2. Threshing: Separating the edible grain from the straw and stalks.
3. Winnowing: Separating the grain from the chaff (lighter debris).
In the context of rice and wheat, it replaces traditional manual labor, saving time and reducing grain losses during the transition from field to storage.

Step 4: Final Answer:
The primary purposes of a combine harvester are harvesting and threshing.