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प्रश्न
How does chemical nature of the soil change due to continued use of chemical fertilizers ?
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उत्तर
Use of chemical fertilisers improve soil fertility for a short duration of time. Continued use of chemical fertilisers cause environmental hazards and lead to the destruction of soil fertility. The increased use of chemical fertilisers cause death of soil microorganisms by making the soil toxic for them. Excessive fertilisers added to the soil end up in the nearby water bodies and increase the nutrient content of the water. This leads to algal bloom.
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संबंधित प्रश्न
How do plants get nutrients?
Compare the use of manure and fertilizers in maintaining soil fertility.
Choose plant’s micronutrients and macronutrients from the following Iron, Chlorine, Sulphur, Copper, Nitrogen, Calcium, Manganese, Potassium, Zinc, Magnesium, Molybdenum, Phosphorus.
Write down two advantages of fertilizer over manure
Give a short account of biofertilizers.
Why water should be used judiciously ?
Write down disadvantages of crop rotation.
Explain various methods of weed control.
Explain various effects of weeds on crop plants.
Explain the various preventive measures against insect pests.
