Question

Read the statements given below i) Seeds require moisture for germination. ii) Plants can absorb nutrients mostly in dissolved form. iii) Irrigation protects crops from both frost and hot air currents. iv) Irrigation improves soil texture. Choose combination of statements which indicate need to irrigate crops. (a) (i) and (ii) (b) (i), (ii) and (iii) (c) (i), (ii), (iii) and(iv) (d) (i) and (iii)​

Answer 1

Answer:

Irrigation is necessary because water is required for germination of seeds, it protects crops from hot and frost air currents, mainly plants absorbs nutrients in dissolved form. So water is necessary.

Answer 2

Answer:

The correct combination is a) (i) and (ii).

Explanation:

• A dormant seed is essentially desiccated and only contains 10 to 15 per cent water.
• To become active, the seed has to absorb water.
• All of the nutrients must be in dissolved form since plants absorb nutrients from the soil to grow.
• The soil texture is not always improved by irrigation.
• Crops are not protected against frost by irrigation.
• Water is artificially applied to the soil or land during irrigation.
• It is used to support the development of agricultural crops, the upkeep of landscapes, and the revegetation of disturbed soils in arid climates and during dry spells.

Both statements i) and ii) are the only ones that describe the need to irrigate crops.

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