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प्रश्न
How plants get nutrients ?
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उत्तर
Nutrients are supplied to the plants by air, water and soil.
From these 16 essential elements, carbon and oxygen are obtained from air and hydrogen from water. Remaining 13 are supplied by the soil.
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संबंधित प्रश्न
What are the advantages of inter-cropping?
Distinguish between micronutrients and macronutrients. Give suitable examples.
Explain various methods of fertilizer application
Define manure. What are different manures and how do they affect the soil ?
Write about three main criteria which should be considered while selecting the crops for rotation?
Mention three different ways in which insect pests can attack the crop plant.
Give two examples each of
(a) Narrow leaved rabi season weed.
(b) Broad leaved kharif season weed.
Explain various effects of weeds on crop plants.
Define irrigation. Why is irrigation of crops essential? Mention the harmful effects of excessive irrigation.
Which one is not a source of carbohydrates?
