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Question

Write short notes on the following:
hybridisation, irrigation, integrated farming, crop protection, symbiotic nitrogen fixation

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Solution

Hybridization: The crossing two varieties of crops having different characteristics to produce a variety with desired characters, is known as hybridisation. This process is continued till the desired characters are obtained.

Irrigation: The watering of fields is known as irrigation. Water for irrigation is drawn from wells, tube wells, ponds, rivers and canals.

Integrated farming: Dairy and poultry farming can be combined with fisheries so that the waste products of the former can be used to feed the fishes. This process is called integrated farming.

Crop protection: Crops need to be protected from pests such as, rats, mice, insects, birds, and microorganisms such as, bacteria, virus and fungi. Pesticides or chemicals are sprayed on plants for their protection from these pests.

Symbiotic nitrogen-fixation: Bacteria live in the root nodules of leguminous plants. They fix the atmospheric nitrogen and convert them into usable form for the plants. In return, they receive nutrients from the plants. This process is known as symbiotic nitrogen fixation.

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