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प्रश्न
What are fertilizers ? Classify fertilizers.
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उत्तर
Fertilisers are organic or inorganic materials that are mixed in the soil to provide plant nutrients essential to the growth of plants. Fertilisers supply nitrogen, phosphorous, and potassium (NPK).
Fertilisers are classified into four groups:
1. Nitrogenous fertilisers: They contain nitrogen as the major nutrient.
2. Phosphatic fertilisers: They contain phosphate or phosphorus as the major nutrient.
3. Potassic fertilisers: They contain potassium as the major nutrient.
4. Complex fertilisers: They contain a combination of multiple nutrients.
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संबंधित प्रश्न
How plants get nutrients ?
Name three most important nutrients required for plant growth.
Explain various methods of fertilizer application
Give a short account of biofertilizers.
Explain, how efficiency of irrigation can be increased.
Write down disadvantages of crop rotation.
Write about three main criteria which should be considered while selecting the crops for rotation?
Explain the methods of controlling insect pests.
What are crop's pests? Suggest preventive measures to control pests.
Discuss the various methods which are used to control plant diseases.
