1. Assertion (A) : Wheat, mustard etc. are rabi crops. Reason (R): Wheat, mustard etc. are grown in the summer season. 2. Assertion (A) : Earthworms are not good for agriculture. Reason (R): Earthworms break down the soil into fine particles and make it soft. 3. Assertion (A) : DDT has nowadays lost its use as an insecticide. Reason (R): DDT is harmful to man. 4. Assertion (A) : Seeds should be treated with fungicide before being sown. Reason (R): Seeds do not germinate, unless treated with fungicide solution. 5. Assertion (A) : Organic farming is a good farming system. Reason (R): Organic farming is done farming without or minimal use of chemicals like fertilizers, herbicides and pesticides. 6. Assertion (A) : Fertilizers are always useful to plants and environment. Reason (R): The excess use of fertilizers leads to water pollution and its continuous use destroy soil fertility. 7. Assertion (A): The crop must get water at the right stages during the growing seasons. Reason (R): Different irrigation methods are used to ensure proper irrigation to the crop.
Answers
Answer:
1. Wheat is a rabi crop because it requires less amount of water and it does not depend on monsoons.
2. Summer vegetable crops include Snap Beans, Corn, Cucumbers, Celery (cold climates), Edamame, Eggplant, Muskmelons, Okra, Pumpkins, Sweet potato (needs long, hot, frost-free season), Tomatillo, Zucchini, Melons, Peppers, Tomatoes, and Squash.
3. “Earthworms change the soil, which in turn reduces biodiversity of forest plants. Changes to vegetation can even negatively affect populations of animals, like birds and salamanders living on the forest floor.” On San Clemente Island, the research team found some evidence of harmful impacts to grassland ecosystems.
4. DDT has lost its use as an insecticide because insects have developed immunity against it.
5. Treating with fungicides before sowing the seed protects it from seed borne diseases which the seed may have acquired during storage. Also, soil-borne pathogens are killed by fungicide treatment. This ensures the production of healthy crops.
6. Seeds are treated with fungicides before sowing to avoid seed-borne diseases. However, seeds may germinate, even if not treated with fungicide solution.
Answer:
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