What is the time interval between the sowing and harvesting of crops?

Crop period is approximately assumed to be the same as that of the base period.

What is the first step in soil preparation before sowing of seeds?

The first watering before sowing the crop is ________

What is called as the percentage of C.C.A irrigated at a time in one crop season?

Superfluous water is also called _______

The useful soil moisture for plant growth is ______

 The area in which inferior crops can be grown without irrigation is called semi-arid region.

A field was supplied water from an tank at a rate of 120 lit/s to irrigate an area of 2.5 Ha. The duration of irrigation is 8 hours.it was found that the actual delivery at the field, which is about 6 km from he tank, was 100 lit/s the ruoff loss in the field was estimated as 800 m3.the application efficiency is

In a cultivated area, the soil has porosity of 45% and field capacity of 40 % For a particular Crop, the root zone depth is 1 m, the permenent wilting point is 10% and the consuptive use is 15 mm/d.if the irrigation efficiency is 60%, what should be the frequancy of irrigation such that the moisture content does not fall below 60 % of the maximum available water.