| Variable | Depth | Value (range) | Units | Ref year | Estimated? | Baseline? |
|---|---|---|---|---|---|---|
| clay content | 0 – 23 Centimetres | 8 | Percent | |||
| soil pH | 0 – 23 Centimetres | 7 (7.1 – 6.8) | 2008 |
| Variable | Time period | Value (range) | Units |
|---|---|---|---|
| precipitation | 1981 – 2010 | 652 (460.5 – 870.4) | millimeter |
| air temperature | 9.9 (8.7 – 10.9) | degree Celsius |
| Crop | Years grown |
|---|---|
| wheat |
| Variable | Material | Units | Frequency | Scale | Comment |
|---|---|---|---|---|---|
| grain yield trait | wheat | t/ha | annually | plot | |
| total soil nitrogen | Soil | % | occasionally | plot | Measured by LECO combustion |
| soil organic carbon | Soil | % | occasionally | Total C by LECO combustion minus CaCO3 |