Table 1 Variables used in the study and their sources and descriptions.
From: Suitability prediction of potential arable land in southeast coastal area of China
Variable type | Variable code | Description | Data source |
|---|---|---|---|
Bioclimatic | BIO1 | Annual mean temperature (°C) | WorldClim |
BIO2 | Mean diurnal range (mean of monthly (max temp − min temp)) (°C) | ||
BIO3 | Isothermality (BIO2/BIO7) (× 100) (°C) | ||
BIO4 | Temperature seasonality (standard deviation × 100) | ||
BIO5 | Max temperature of warmest month (°C) | ||
BIO6 | Min temperature of coldest month (°C) | ||
BIO7 | Temperature annual range (BIO5-BIO6) (°C) | ||
BIO8 | Mean temperature of wettest quarter (°C) | ||
BIO9 | Mean temperature of driest quarter (°C) | ||
BIO10 | Mean temperature of warmest quarter (°C) | ||
BIO11 | Mean temperature of coldest quarter (°C) | ||
BIO12 | Annual precipitation (mm) | ||
BIO13 | Precipitation of wettest month (mm) | ||
BIO14 | Precipitation of driest month (mm) | ||
BIO15 | Precipitation seasonality (coefficient of variation) (mm) | ||
BIO16 | Precipitation of wettest quarter (mm) | ||
BIO17 | Precipitation of driest quarter (mm) | ||
BIO18 | Precipitation of warmest quarter (mm) | ||
BIO19 | Precipitation of coldest quarter (mm) | ||
Topographic | Ele | Elevation (m) | Geospatial data cloud platform |
Slope | Slope (°) | ||
Aspect | Aspect (°) | ||
Water | Dist-water | Euclidean distance to class 5 drainage (m) | 2008 |
Soil | Gravel | Percentage of crushed stone by volume (%) | China’s second national soil survey |
Sand | Sand content (%) | ||
Clay | Clay content (%) | ||
Silt | Silt content (%) | ||
OC | Organic carbon content (%) | ||
CEC | Soil cation exchange capacity (me/hg) | ||
ESP | Exchangeable sodium salt (me/gh) | ||
pH | pH | ||
Caco3 | Carbonate or lime content (%) |
