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 |