Irrigation

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 the combination of statements which indicate the need to irrigate crops.

If one plots the tank irrigation in India and superimposes it with map of well irrigation, one may find that the two are negatively related. Which of the following statements explain the phenomenon? 1. Tank irrigation predates well irrigation. 2. Tank irrigation is in the areas with impervious surface layers. 3. Well irrigation requires sufficient groundwater reserves. 4. Other forms of irrigation are not available. Select the correct answer using the code given below.

Which of the following conditions will give the most benefits? Why? (a) Farmers use high-quality seeds, do not adopt irrigation or use fertilizers. (b) Farmers use ordinary seeds, adopt irrigation and use fertilizer. (c) Farmers use quality seeds, adopt irrigation, use fertilizer and use crop protection measures.

What happens when a matured wheat crop is irrigated ?