Geography [1 Mark Question Answer]

Tube wells are extensively used in Punjab and Haryana because the land is soft to bore and availability of electric power.

Two advantages of rainwater harvesting are:
(i) Recharge of groundwater
(ii) Conservation of water, reduces surface runoff.

The prevalent types of irrigation in our country are:
(i) Wells: both ordinary and tube-wells, (ii) Tanks, (iii) Canals.

Uttar Pradesh.

Ordinary wells and tube-wells.

Uttar Pradesh, Punjab, Haryana.

Two objectives of rain water harvesting:
(i) To utilise the rainwater for domestic consumption.
(ii) Raise ground water table.

Agricultural crops are varied. Ample supply of water is required during the period of growth.

Excessive flow of water in the fields raises the grounds water level. Capillary action brings alkaline salts to the surface and makes large areas unfit for agriculture.

The drip method of irrigation does not involve any loss of water by seepages because water is supplied through pipes. No water is lost by evaporation because water is supplied directly on to the roots of the plants.

Indian monsoons are most uncertain. Late arrival or early withdrawal of the monsoon affects crop production severely. Only irrigation can provide security to agriculture from such irregularity.