Variable | Depth | Value (range) | Units | Ref year | Estimated? | Baseline? |
---|---|---|---|---|---|---|
sand content | 0 – 60 Centimetres | 27 | Percent | |||
silt content | 0 – 60 Centimetres | 11 | Percent | |||
clay content | 0 – 60 Centimetres | 62 | Percent | |||
soil pH | 0 – 30 Centimetres | 7.6 | 1993 | |||
cation exchange capacity | 0 – 30 Centimetres | 39 | kilogram per centimole | 1993 | ||
soil organic carbon | 0 – 30 Centimetres | 9 | gram per kilogram | 1993 |
Variable | Time period | Value (range) | Units |
---|---|---|---|
air temperature | (3 – 35) | degree Celsius | |
precipitation | 593 | millimeter |
Crop | Years grown |
---|---|
cotton | |
winter wheat | |
fallow |
Variable | Material | Units | Frequency | Scale | Comment |
---|---|---|---|---|---|
grain yield trait | winter wheat | ||||
cotton lint yield | cotton |