Crop | Years grown |
---|---|
wheat | |
maize | |
soybeans |
Variable | Material | Units | Frequency | Scale | Comment |
---|---|---|---|---|---|
Grain yield trait | All crops | kg/ha | annually | ||
Soil organic matter | Soil | g/kg | annually | ||
pH | Soil | annually | |||
Extractable P | Soil | mg/kg | annually | Bray and Kurtz 1-P | |
Nitrate-N | Soil | mg/kg | annually (maize and wheat) | ||
Sulphate-S | Not specified | mg/kg | annually (maize and wheat) | ||
Potential of N mineralization | Soil | mg/kg | before wheat drilling | 7-day anaerobic incubation test | |
N content in grain | All crops | percent | annually | ||
S content in grain | All crops | percent | annually | ||
P content in grain | All crops | percent | annually | ||
thousand grain weight | All crops | g | annually |