Table 1 Summary of LUCAS top-soil 2018 abiotic data variables
Variable | Value range | Description |
|---|---|---|
Soil properties variables | ||
CaCl2 | 3.60–8.20 | pH index using calcium chloride |
Electric conductivity | 2.25–291.00 | Salinity indicator of soil (mS/m) |
Soil type | 1–6 | Factor of 6 levels containing one level per soil type |
Soil nutrients variables | ||
Organic carbon | 2.10–280.50 | Extractable Organic Carbon (g/kg) |
Phosphorus | 0.01–331.10 | Extractable Phosphorus (mg/kg) |
Nitrogen | 2.00–211.00 | Extractable Nitrogen (g/kg) |
Potassium | 19.10–2215.90 | Extractable Potassium (mg/kg) |
Vegetation variables | ||
Crop type | 1–3 | Factor of 3 levels containing one level per crop type |
Weather-related variables | ||
Climate zone | 1–7 | Factor of 7 levels corresponding to the Köppen-Geiger climate zones |
Soil moisture | 0.01–0.64 | Yearly average soil moisture (m3) |
Soil temperature | 277.50–296.30 | Yearly average soil temperature (K) |
Air temperature | 275.20–295.00 | Yearly average air temperature (K) |
Soil moisture prior | 0.00–0.58 | Mean soil moisture measured for the month prior to observed NDVI (m3) |
Soil temperature prior | 283.00–305.30 | Mean soil temperature measured for the month prior to observed NDVI (K) |
Air temperature prior | 283.40–303.00 | Mean air temperature measured for the month prior to observed NDVI (K) |
Seasonality | 1–3 | Factor of 3 levels containing one level per season (excluding winter) |
