Welcome to IrrigationWorld2000

 

 

 

Washington State University comparison of sensors report

Water monitoring equipment

Author - Brian Lieb email: brain_lieb@wsu.edu


"Time" to compare soil moisture sensors.

Speaking of time, I am reminded of a proverb that states "A man with two watches never knows what time it is". I felt the same way in 1998, about soil moisture sensors and hence this report.

The report can be seen in full at: http://sis.prosser.wsu.edu

IRRIG.

RATIO

PAWS ET

RATIO

Correlatation

Value

NEUTRON PROBE EAST

0.86

0.86

1

WEST

0.78

0.87

1

ENVIROSCAN - EAST

1.13

1.14

0.97

WEST

0.88

0.94

0.96

TROXLER SENTRY - EAST

0.58

0.67

0.82

WEST

0.57

0.63

0.82

AQUATEL - EAST

0.71

0.81

0.79

WEST

0.45

0.43

0.65

AQUAFLEX - EAST

0.77

0.45

0.71

WEST

0.38

0.23

0.65

TENSIOMETER - EAST

0.4

0.42

0.86

WEST

0.39

0.34

0.68

WATERMARK - EAST

0.28

0.59

0.52

WEST

0.1

0.6

0.12

Conclusions:
  • Irrigation scheduling will become increasingly necessary for growers survival.
  • More and more pieces of equipment will become available.
  • These will need independent verification.

The most important calibration of all this equipment is 'Profit'.

{Back to the index}

IrrigationWorld2000.com