| Variable | Depth | Value (range) | Units | Ref year | Estimated? | Baseline? |
|---|---|---|---|---|---|---|
| sand content | 0 – 20 Centimetres | 28 | Percent | |||
| silt content | 0 – 20 Centimetres | 34 | Percent | |||
| clay content | 0 – 20 Centimetres | 38 | Percent | |||
| soil organic carbon | 0 – 20 Centimetres | (1.8 – 3.6) | Percent |
| Variable | Time period | Value (range) | Units |
|---|---|---|---|
| precipitation | 1959 – 2013 | 846 | millimeter |
| air temperature | 1959 – 2013 | 8.9 | degree Celsius |
| Crop | Years grown |
|---|---|
| maize | |
| Poa pratensis | |
| alfalfa | |
| oats |
| Variable | Material | Units | Frequency | Scale | Comment |
|---|---|---|---|---|---|
| water flow | Soil | ||||
| concentration of nitrate in soil | Soil | ||||
| grain yield trait | maize |