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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
What are macro-nutrients and why are they called macronutrients?
Distinguish between micronutrients and macronutrients. Give suitable examples.
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How does chemical nature of the soil change due to continued use of chemical fertilizers ?
Give a short account of biofertilizers.
Mention three effects of excessive irrigation.
Define plant breeding? Describe the various methods of plant breeding.
What are crop's pests? Suggest preventive measures to control pests.
Which one is not a source of carbohydrates?
Why is organic matter important for crop production?
