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Consider the following organisms:
1. Agaricus
2. Nostoc
3. Spirogyra

Which of the above is/are used as biofertilizer/ biofertilizers?

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Important Questions on Soil and Soil Conservation

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What is straight nitrogen fertilizer?
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Which type of fertilizer is mostly exported from India?
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Which one of the following fertilizers is known as 'Kisan Khad'?

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What is a Compound Fertiliser?
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What type of fertilizer is Urea?
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Fertilisers that contain algae, fungi, bacteria and microbes are called-
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What  is a Binary fertilizer?
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What can be the impact of excessive/inappropriate use of nitrogenous fertilizers in agriculture?

I. Proliferation of nitrogen-fixing microorganisms in soil can occur.

II. Increase in the acidity of soil can take place.

III. Leaching of nitrate to the groundwater can occur.

Select the correct answer using the codes given below.

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The Phosphatic fertilizer that is suitable for acidic soils is:
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In Banana, which nutrient is given in largest amount through fertization?
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Why Urea is called Straight fertilizer?
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What is the Agricultural use of Compound fertilizers?
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Which features of some species of blue-green algae help promote them as bio-fertilizers?
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Where is the largest fertilizer factory located in India?
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Which one of the following fertilizers is known as 'Kisan Khad'?
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Animal tankage, sludge and Urea are the examples of:
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Cotyledons are also called-
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Which one of the following is not a primary nutrient?
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Which of the following adds/add nitrogen to the soil?
1. Excretion of urea by animals.
2. Burning of coal by man.
3. Death of vegetation.
Select the correct answer using the codes given below:
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Phosphate fertilizers are made up of: