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प्रश्न
Mention three effects of excessive irrigation.
उत्तर
Effects of excessive irrigation are as follows:
1. It causes water logging.
2. It increases soil salinity.
3. It causes the death of crop plants by limiting the amount of oxygen available to the roots of the plants.
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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
During the downpour in a village, the rain water carried away excess of nitrogenous and other compounds present in the soil to a pond. How will they affect the growth of algae and phytoplankton in the pond ?
What are fertilizers ? Classify fertilizers.
Explain why a legume crop does not require nitrogenous fertilizers ?
Classify plant diseases depending upon their occurrence and transmission.
Explain the methods of controlling insect pests.
If there is low rainfall in a village throughout the year, what measures will you suggest to the farmers for better cropping?
