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प्रश्न
How do plants get nutrients?
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उत्तर
Plants require sixteen essential nutrients from nature for their growth and development. All these nutrients are obtained from air, water and soil. Soil is the major source of nutrients. Thirteen of these nutrients are available from soil. The remaining three nutrients (carbon, oxygen and hydrogen) are obtained from air and water.
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संबंधित प्रश्न
Distinguish between farmyard manure and compost manure.
Explain advantages of irrigation.
Define intercropping. How does it differ with mixed cropping?
Classify plant diseases depending upon their occurrence and transmission.
Give two examples each of
(a) Narrow leaved rabi season weed.
(b) Broad leaved kharif season weed.
What are crop's pests? Suggest preventive measures to control pests.
Distinguish between fertilizer and manure. Give suitable examples. What are advantages and disadvantages of using fertilizer?
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.
Explain the various preventive measures against insect pests.
If there is low rainfall in a village throughout the year, what measures will you suggest to the farmers for better cropping?
