Question

Explain
a. The disadvantage of well irrigation
b. Tank Irrigation is not popular in North India.
Give reasons for the following:
1. Lined and unlined wells suit poor Indian farmers.
2. Well water adds fertility to the soil.

Answer 1

Hint: Irrigation is the artificial method of adding regulated quantities of water to land in order to aid in crop production. Well water is untreated groundwater. Well drillers reach the aquifer, which is an underground layer of permeable rock that contains water.

Complete answer:
a. The disadvantage of well irrigation-
It is important to raise the water from underground in order to make it usable for irrigation purposes. Power is required to raise the water. Thus, well irrigation is heavily reliant on the availability of electricity or the smooth operation of machinery, all of which are extremely rare.
The cost of well water may often be so high that the returns are unjustifiable.
The availability of water from wells is determined by groundwater storage. The discharge from the well is poor, and the area commanded is small.
b. Tank Irrigation is not popular in North India-
1. The plains and soft rocks of the north render digging canals and wells easy.
Because of the massive percolation of rainwater caused by porous rock structures, there is an abundance of ground water available.
The unbroken existence of the population and agricultural fields also works toward tank irrigation.
1. Lined and unlined wells suit poor Indian farmers because it is cheaper and needs less maintenance.
2. Well water adds fertility to the soil.
Well irrigation increases soil fertility because certain chemicals such as nitrate, chloride, sulphate, and others are found mixed with the well water. When these chemicals combine with the soil, they increase its fertility.
Inundation canals are only usable during the rainy season since they are directly drawn from rivers without any barrage or dam, so we can only use them when the rivers are high.

Note:
Drilling wells descend to the aquifer, which is an underground layer of permeable rock containing water. The water is then carried up from the ground and into your home by a pump system. It is not difficult to find drinkable groundwater.