Samples taken today by Steve O&S:
To be expedient (and since not much structure in sandy soil), just took one sample 0-6cm.
At far, had to dig out core from the side and support from underneath to remove.
Despite almost 2 hours before weighing, saw no evidence of moisture condensed in container.
Site | Time | Weigh Time | Tare | "Wet" | Dry | Dry Density | Moisture (%mass) | Moisture (%vol) | EC5 reading (%vol) |
|---|---|---|---|---|---|---|---|---|---|
far | 11:20 | 13:10 | 3.1 | 176.7 | 172.2 | 1.23 | 2.7 | 3.3 | -1.2 |
near | 12:00 | 13:15 | 2.4 | 161.1 | 156.9 | 1.12 | 2.7 | 3.0 | 5.4 |
flr | 15:15 | 16:45 | 2.4 | 167.0 | 159.2 | 1.14 | 5.0 | 5.7 | -3.9 |
Treating the differences as a simple offset in the EC5 calibration, the Qsoil values for the entire project become somewhat believable.
We should contact Decagon to see if odd behavior in metallic soils would be expected...