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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.
संबंधित प्रश्न
How do plants get nutrients?
What are the advantages of inter-cropping?
Compare the use of manures and fertilizers in maintaining soil fertility.
How does chemical nature of the soil change due to continued use of chemical fertilizers ?
Explain, how efficiency of irrigation can be increased.
Explain the advantages of mixed cropping.
How does intercropping differ with mixed cropping?
Mention three different ways in which insect pests can attack the crop plant.
What are crop's pests?
Explain what will happen if in a cultivated field only manures are supplied and in another field only fertilizers are supplied, keeping all other conditions similar.
