Question

Identify the true statement(s) pertaining to open well and tube well irrigation.

• A. Tube wells irrigate less area per day than open wells.
• B. Open well irrigation is cheaper than tube well irrigation.
• C. No electricity is required for open well irrigation.
• D. Tube well irrigation becomes more costly with the depth of the well, while the cost remains constant in open well irrigation.

Answer 1

Answer: (B), (C), (D)

The correct options are
B Open well irrigation is cheaper than tube well irrigation.
C No electricity is required for open well irrigation.
D Tube well irrigation becomes more costly with the depth of the well, while the cost remains constant in open well irrigation.

Tube wells can generally irrigate about 2 hectares of land per day against 0.2 hectares of land irrigated by an ordinary well. If the water table is more than 50 metres deep, the cost of pumping out water from the tube well becomes uneconomic. A tube well requires a pump and in order to run that pump, there is a continuous requirement of electricity.