CCZO -- Soil Moisture -- Hydroprobe -- Calhoun Critical Zone Observatory -- (2016-Ongoing)

Soil moisture data collected using a CPN 503 Elite Hydroprobe (Instrotek, Inc., Raleigh, NC, USA) inserted into 5 m deep wells lined with PVC tubing. Measurements are taken in 30 cm intervals at depths between 30 and 480 cm, measured from the mineral soil surface. Standard count (R) is collected once per sampling date before data collection. Counts are collected for 30 sec per sample. These data are collected concurrently with soil gas sample collections at three locations in the Research Area 1 cultivated fields, and in References Hardwood and Old Field Pine pairs in Research Areas 1, 4 and 7. Hydroprobe and soil gas data are also collected in 6 locations in a pine forest in Research Area 1. Calibration relating count data to soil moisture is still in progress.