Impact of Agriculture on Ecosystem

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  • Q1

    Consider the following statements and identify the wrong one.

    Marks:1
    Answer:

    Under conventional agriculture, the use of pesticides has led to low levels of chemical build up in the environment in soil, water, air, etc.

    Explanation:

    Under conventional agriculture, the use of pesticides has led to high levels of chemical build up in the environment in soil, water, air, and even in our bodies. The path of conventional agriculture that we have chosen is unsustainable.

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  • Q2

    ___________ maintains long term fertility of the soil and thus is sustainable.

    Marks:1
    Answer:

    Organic farming

    Explanation:

    Organic farming maintains long term fertility of the soil and thus is sustainable. It is a system of farming that relies upon the use of organic inputs for cultivation. It is a natural way of farming which is environment friendly.

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  • Q3

    Since population is increasing rapidly, ___________ is must to meet the needs of growing population to feed them with meat, dairy products (milk) etc.

    Marks:1
    Answer:

    cattle farming

    Explanation:

    Since population is increasing rapidly, cattle farming is must to meet the needs of growing population to feed them with meat (beef and veal), dairy products (milk) etc. Due to this forests are getting destroyed in order to convert it into grazing land which is also a reason of deforestation.

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  • Q4

    __________ has posed a big threat to the ecosystem.

    Marks:1
    Answer:

    Hydroelectric projects

    Explanation:

    Hydroelectric plants and large dams have posed a big threat to the ecosystem. For example the Idukki dam over the Periyar river in Kerala has sharply reduced the forest cover.

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  • Q5

    Identify the reason behind the deforestation among the given options.

    Marks:1
    Answer:

    All of the above

    Explanation:

    Deforestation means removal of the forest cover of an area in demand of more land for agriculture and human settlement.
    Reason behind the deforestation are as follows:
    (i) Requirement of fuel wood for cooking, lighting and heating purposes.
    (ii) Requirement of raw material for industries like wood for paper, furniture, etc.
    (iii) Construction of dams
    (iv) Overgrazing

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