Tensiometer based irrigation management
In AWD method of irrigation in rice,effective
irrigation scheduling can also be done based on soil water potential as
measured by tensiometer. Irrigation scheduling based on tensiometer
saves irrigation water upto 50%. Tensiometers continuously monitor soil water
status, which is useful for practical irrigation scheduling, and are
extensively used on high-value cash crops where low water tension is desirable.It is ideal for sandy loam or light-textured soils.The measurement range is
limited to less than one bar tension, accurate measurement is obtained below
0.8 bar. Coarse-textured soils require to be irrigated at 0.2 to 0.3 bar and
finer soils at 0.3 to 0.4 bar soil moisture.