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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 do plants get nutrients?
Explain the advantages and disadvantages of mixed cropping.
Write down disadvantages of crop rotation.
Write about three main criteria which should be considered while selecting the crops for rotation?
Classify plant diseases depending upon their occurrence and transmission.
Explain the methods of controlling insect pests.
Explain various effects of weeds on crop plants.
Compare between mixed cropping and intercropping. Write down from advantage of both of these techniques.
Which one is not a source of carbohydrates?
If there is low rainfall in a village throughout the year, what measures will you suggest to the farmers for better cropping?
