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प्रश्न
What is the advantage of using insect resistant varieties?
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उत्तर
Advantage of using insect-resistant varieties is that it reduces the use of insecticides. This will help in maintaining the soil fertility for a longer period of time, as harmful chemicals present in insecticides will not be added to the soil. It will also reduce the cost of crop production by removing the expenditure of buying insecticides.
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संबंधित प्रश्न
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.
How does chemical nature of the soil change due to continued use of chemical fertilizers ?
Explain the objectives of mixed cropping.
Distinguish between mixed cropping and intercropping.
Classify plant diseases depending upon their occurrence and transmission.
Explain the methods of controlling insect pests.
Explain the mechanism of compost formation.
Discuss the various methods which are used to control plant diseases.
Differentiate between the following
Mixed cropping and Intercropping
