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प्रश्न
Classify nutrients according to their sources.
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उत्तर
Nutrients are classified into three groups according to their sources.
| Source | Nutrients | |
| 1. | Air | Carbon (C) and oxygen (O) |
| 2. | Water | Hydrogen (H) |
| 3. | Soil | Nitogen (N), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), sulphur (S), iron (Fe), manganese (Mn), boron (B), zinc (Zn), copper (Cu), molybdenum (Mo), and chlorine (Cl) |
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संबंधित प्रश्न
How do plants get nutrients?
Why are manures and fertilizers used in fields?
Name three most important nutrients required for plant growth.
Distinguish between farmyard manure and compost manure.
Define intercropping. How does it differ with mixed cropping?
Give two examples each of
(a) Narrow leaved rabi season weed.
(b) Broad leaved kharif season weed.
Distinguish between fertilizer and manure. Give suitable examples. What are advantages and disadvantages of using fertilizer?
Compare between mixed cropping and intercropping. Write down from advantage of both of these techniques.
Discuss the various methods which are used to control plant diseases.
Explain the various preventive measures against insect pests.
