Soil matric potential - tensiometer (T4)

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114 T4 Tensiometer.jpg

Contents

Parameter to be measured:

Soil matric potential

Method:

Tensiometer

Equipment:

T4 with external refilling option

Advantages:

  • Very fast response
  • Reliable
  • Refilling possible without taking the probes out of the soil
  • Great range: -1000 to 0 to 850 hPa

Disadvantages:

  • Accuracy could be a disadvantage (+/- 0.25 kPa) according calibration sheet) depending on objective of study
  • Some of installed tensiometers showed a stepwise output during small changes in soil matric potential (e.g. during drainage) in the order of 0.25 kPa


What to watch out for:

  • Freezing conditions at fieldsite: at shallow soildepth (do not install year-round) and above-ground (insulate the shaft with PVC and isolation material)
T4 field.jpg

Problems/Questions:

Links

Projects that used the above equipment:

  • PhD project WS10 HJ Andrews Experimental Forest

Other related web sites:

References

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