What is the function of nitrosomonas bacteria in the nitrogen cycle?

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Nutrient replenishment in soil can be enhanced by

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The major factor affecting distribution of crops in West Africa is

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Which of the following is not an effect of over-graing on soil?

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The practice of growing different crops in sequence on a piece of land is known as

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The method of surface irrigation widely used in rice fields is

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Wind can be beneficial to crop production because it

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It is important to clean and grease plough discs after use to

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The appropriate farm tool for lifting tomato seedlings for transplanting is the

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The machine used for removing seeds from maize cobs is called a

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The function of the seed -tube of a seed drill is to

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The agricultural sector in West Africa is plagued with poverty because

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