Data set ID:
Volumetric soil water is used to measure the effectiveness of the water manipulation treatments.
Soil water content is monitored at 2 depths (5-10, 30-50 cm) using ECH2OTM moisture probes connected to an ECH2O check handheld.
field data sheets
Soil moisture measurements are done the day after a PPT event greater than 2mm.
Then again the 5th, and the 8th day after the rain, and 2 weeks after the last
measurement was taken.
- If no rain events in between, measure every 2 weeks.
- Measurements are taken around the same time of the day.
Soil moisture Echo probes are permanently installed at two depths (0-5cm and 30-50 cm) in plots
representing all PPT (precipitation) treatments, from -80 percent interception to +80 percent rain supplementation.
To record soil moisture, a handheld is plugged to the probe and the data is recorded in field data
sheets. Probes where calibrated for the soils in Pasture 13 at the beginning of the experiment.
%VWC(0-5)=((SEN*0.000616) - 0.1671)*100
where %VWC(0-5)= % soil water content at shallow depth (0-5 cm)
%VWC(30-50)= % soil water content at deep depth (30-30 cm)
SEN = millivolt reading made with ECH2OTM moisture probes
Visual verification of data.
Preliminary treatment of data:
Exclosures 1, 2, and 3 within Pasture 13 (Study Area West) of USDA-ARS Jornada
Experimental Range. See attached file "Study278sheltertable.xls" for plot GPS
coordinates. The coordinates are UTM Zone13 WGS84.
Based on rainfall event