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Why are manure and fertilizers used in f...

Why are manure and fertilizers used in fields ?

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Manure and fertilizers are added to the soil to increase the fertility of soil and productivity of crop. They overcome the deficiency of nutrients in the soil.
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Why are manure and fertilisers used in fields?

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Knowledge Check

  • Assertion : Manures and biofertilizers shuld be used in place of chemical fertilizers. Reason : Chemical fertilizers cause pollution by releasing excess nutrients in water bodies.

    A
    If both assertion and reason are true and reason is the correct explanation of assertion.
    B
    If both assertion and reason are true but reason is not the c orrect explanation of assertion.
    C
    If assertion is true but reason is false.
    D
    If both assertion and reason are false.

  • A farmer is growing a crop regularly in his field. He uses chemical fertilizers, pesticides, organic manure as well as bio-fertilizers. Very close to his field is a factory which emits smoke as a by product. There is also a huge lake in the nearby area. An expert agriculturist suggests to the farmer to minimize the use of chemical fertilizers and instead use biofertilizers as they have many advantages over chemical fertilizers. Which of the following is NOT true for biofertilizers?

    A
    They are economical
    B
    They help in reducing pollution in the lake
    C
    They are renewable
    D
    They require large set-up for their production.

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    For what purposes the chemical fertilizers are used in crop fields ?

    Compare the use of manure and fertilizers in maintaining soil fertility.

    Compare the use of manures and fertilizers in maintaining soil fertility.

    Why do farmers spread fertilisers and manures in the fields ?

    Why do farmers spread fertilisers and manures in the field?

    Why are manures used in bulk to increase soil fertility ?

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