Irrigation – Free PSC Quiz (11)

Paleo irrigation: Watering done for land preperation .It is the first watering before land preperation

Time factor: It is the ratio of number of days the canal has actually run to total number of days of watering period

Cumec day: Total volume of water supplied at the rate of 1 cumec in a day. One cumec day is equal to 8.64 hect-m

Kor watering:  is the first watering after the plants have grown a few centimeters high.

Following are the remedial measures for water logging

 

Efficient surface drainage

Underdrainage by tile drains

Reducing percolation from canals

Economic use of water

Lining of watercourses

Removing obstruction in natural drainage

Prevention of seepage from water reservoir

Depletion of ground water storage by pumping

Changes in crop pattern

Adoption of sprinkler method for irrigation

Operation which washes out salts from the upper zone of the soil is called leaching

Process of washing out salts from the upper zone of the soil by flooding is called saturation

Gravitational water is the amount of water which will flow under the influence of gravity. It is also called superflous water.It is unavailable to the plants

Capillary water is the amount of moisture stored in the capillary pores which can be extracted by the plant. It is held due force of surface tension.It is the only water available to the plants

Hygroscopic water is the amount of moisture absorbed from the atmosphere by soil grains. It is unavailable to plants

Kor watering: It is the first watering done after the crops have grown a few centimeters high.

Paleo irrigation : It is the first watering done prior to sowing of a crop