Table 3 Parameters and abbreviations for environmental indicators in the text
Indicator type | Acronym | Environmental indicators | Unit |
|---|---|---|---|
Drought indices | SPI | Standardized precipitation index | unitless |
Drought indices | SPEI | Standardized precipitation evapotranspiration index | unitless |
Drought indices | PDSI | Palmer drought index | unitless |
Drought indices | AI | Aridity Index | unitless |
Soil indicator | pH | pH of soil | unitless |
Soil indicator | EC | Soil soluble salt concentration | ms/cm |
Soil indicator | WS | Water content of soil | % |
Soil indicator | SH | Soil hardness | Pa |
Soil indicator | BD | Soil bulk density | g/cm3 |
Soil indicator | SOM | Soil organic matter | g/kg |
Climatic indicator | MAP | Mean annual precipitation | mm |
Climatic indicator | MPS | Mean precipitation during growing season | mm |
Climatic indicator | AP8 | Average precipitation at August | mm |
Climatic indicator | MAE | Mean annual evaporation | mm |
Climatic indicator | MAH | Mean annual humidity | % |
Climatic indicator | MAT | Mean annual air temperature | ℃ |
Climatic indicator | MTS | Mean temperature during growing season | ℃ |
Climatic indicator | AT8 | Average temperature at August | ℃ |
Climatic indicator | MAW | Mean annual wind speed | m/s |