Q:

What are the uses of a combine harvester?

A:

Quick Answer

A combine harvester is a machine used to harvest grains like wheat, rye, barley, oats, corn, flax and soybeans. Instead of using separate machines for reaping, threshing and winnowing the grain, the harvester combines all these functions into one machine.

Know More
What are the uses of a combine harvester?
Credit: David Wright CC-BY-2.0

Full Answer

The wide header at the front of the harvester gathers the grain into the combine. The reel moves it towards the cutter bar, where it is sliced off at the base. The grain then travels up a conveyor to the threshing drum, where the grains are separated from the stalks. A collecting tank gathers the grain as it falls through sieves, and straw walkers carry the chaff towards the back of the harvester. As the grain tank fills, it must be emptied into a trailer through a side pipe called an unloader. The chaff is either spread out over the field or baled up for later use.

Different removable heads are designed for the various types of crops. Standard grain platforms are generally used for wheat, while flex platforms that can cut closer to the ground are used for soybeans. Corn heads have snap rolls that remove the ear from the stalk and leaves. Dummy heads pick up crops that have already been cut. Special combines with mud tracks are able to harvest rice. For hillsides, combines are fitted with special hydraulic systems that enable them to level out while they are harvesting.

Learn more in Agriculture

Related Questions

  • Q:

    What was the average wheat yield per acre in the 1800s?

    A:

    The average yield per acre of wheat during the 1800s was 13.3 bushels per acre, according to the USDA. By contrast, the average U.S. wheat yield per acre in 2013 was 47.2 bushels per acre.

    Full Answer >
    Filed Under:
  • Q:

    What are the advantages and disadvantages of agriculture?

    A:

    Modern agriculture has vastly increased the amount of food that farms are capable of producing with great gains in efficiency, but it can also have a major negative impact on the environment. Large-scale farms are vital for keeping the world fed, but they can devastate local ecosystems through clearcutting and runoff, which often releases methane, ammonia and other toxic chemicals into the environment.

    Full Answer >
    Filed Under:
  • Q:

    How many bales of hay are in an acre?

    A:

    According to Oregon State University Extension Service, an acre may yield between 65 to 165 small bales of hay per cutting, with up to three cuttings per year. The yield depends on location, fertilization, plant species, plant age, moisture content and how tightly the bales are packed.

    Full Answer >
    Filed Under:
  • Q:

    What crops are grown in Brazil?

    A:

    Brazilian farmlands produce coffee, sugarcane, soybeans and cocoa. The country's grain production consists of primarily corn and rice, and its groves produce citrus fruits and bananas. Non-food crops include tobacco and cotton.

    Full Answer >
    Filed Under:

Explore