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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
Why are manures and fertilizers used in fields?
Name three most important nutrients required for plant growth.
During the downpour in a village, the rain water carried away excess of nitrogenous and other compounds present in the soil to a pond. How will they affect the growth of algae and phytoplankton in the pond ?
Explain advantages of irrigation.
Explain, how efficiency of irrigation can be increased.
Explain the advantages and disadvantages of mixed cropping.
Why are leguminous crops desirable in crop rotation?
Explain the methods of controlling insect pests.
Compare between mixed cropping and intercropping. Write down from advantage of both of these techniques.
Why is organic matter important for crop production?
