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प्रश्न
What are macro-nutrients and why are they called macronutrients?
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उत्तर
Nutrients are supplied to plants by air, water and soil. There are several nutrients that are essential for plants. Air supplies carbon and oxygen, hydrogen comes from water, and soil supplies the other thirteen nutrients to plants. Amongst these, some are required in large quantities and are called macro-nutrients. The six macronutrients required by plants are nitrogen, phosphorus, potassium, calcium, magnesium, and sulphur.
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संबंधित प्रश्न
How do plants get nutrients?
What are the advantages of inter-cropping?
Distinguish between micronutrients and macronutrients. Give suitable examples.
Give two limitations of using manure.
How does chemical nature of the soil change due to continued use of chemical fertilizers ?
Explain why a legume crop does not require nitrogenous fertilizers ?
How does excessive irrigation lead to soil salinity ?
Mention three effects of excessive irrigation.
Define intercropping. How does it differ with mixed cropping?
Compare between mixed cropping and intercropping. Write down from advantage of both of these techniques.
