Principally the main bases for comparison are to compare the field losses with the net water requirement
in addition to that a comparison should be carried out between the most important financial indicators i.
e. the used capital and the investmen
t capital.
Comparing field losses to the net water requirement, it appears that drip irrigation methods come first
then comes sprinkler irrigation and after surface irrigation (furrow irrigation), but from comparing the
basic cost to financial investment, it appears that sprinkler irrigation precedes drip irrigation followed by
surface irrigation (furrow irrigation).
If we take into consideration the crop composition in the region where wheat crop, according to the crop
rotation reaches 56.24% and which is impossible to irrigate by the drip method, in addition to the
necessity of forming a washing stream of water opposing the rising water stream by capillarity caused by
the proximity of saline underground water, we found out that irrigation by sprinkling is the optimum
method for this region.
