Difference between revisions of "Soil matric potential - tensiometer (T4)"
Jump to navigation
Jump to search
| Line 43: | Line 43: | ||
[[Category:Equipment]] | [[Category:Equipment]] | ||
| + | [[Category:Soil matric potential]] | ||
Revision as of 03:13, 13 April 2007
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)
Problems/Questions:
Links
Projects that used the above equipment:
- PhD project WS10 HJ Andrews Experimental Forest
Other related web sites:
- http://www2.decagon.com/geo/T4
- http://www.ums-muc.de/fileadmin/files/Content/Katalog/5%20Tensiometer-ENG-R3.pdf