| Variable | Depth | Value (range) | Units | Ref year | Estimated? | Baseline? |
|---|---|---|---|---|---|---|
| silt content | 38.5 | Percent | ||||
| sand content | 35.2 | Percent | ||||
| clay content | 26.4 | Percent | ||||
| soil pH | 7.2 | |||||
| soil organic carbon | 28 | gram per kilogram | ||||
| soil carbon to nitrogen ratio | 12.7 |
| Variable | Time period | Value (range) | Units |
|---|---|---|---|
| precipitation | 1981 – | 844 | millimeter |
| air temperature | 1981 – | 9.1 |
| Crop | Years grown |
|---|---|
| soybeans | |
| maize | |
| red clover | |
| alfalfa | |
| oats |
| Variable | Material | Units | Frequency | Scale | Comment |
|---|---|---|---|---|---|
| grain yield trait | Not specified | ||||
| economic data | Not specified |