Which of the following fertilizers should be applied for good plant growth after prolonged use of sulphate of ammonia on a neutral soil?

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Controlled burning has the advantage of

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The atmosphere gains carbon dioxide through the following ways except

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Magnesium deficiency in crops can be corrected by the application of

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It is not advisable to apply fresh farmyard manure because

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Chemical weathering is fastest in

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Which of the following rocks is not formed from pre-existing rocks?

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The following processes in soil formation are caused by biotic factors except

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The natural grasslands of West Africa are generally located in the

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The use of land for agricultural purpose involves the following except

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The practice of growth both food and forage crops simultaneously on the same piece of land is called

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Agricultural land use is negatively affected by

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