Table 2.
Variables | Observations | Time period | Mean | Standard deviation | Min | Max |
---|---|---|---|---|---|---|
Nitrate | 15,423 | 1992–2008 | 20.62 | 28.69 | 0.00 | 801.21 |
Precip | 14,169 | 1975–2007 | 2.78 | 1.30 | 0.96 | 10.84 |
Temp | 14,169 | 1975–2007 | 12.58 | 2.65 | 3.22 | 23.54 |
Landuse_oilseed & protein | 9974 | 1999–2008 | 0.03 | 0.04 | 0.00 | 0.33 |
Landuse_forage crops | 7856 | 1999–2008 | 0.04 | 0.04 | 0.00 | 0.61 |
Landuse_cereal & maize | 7856 | 1999–2008 | 0.19 | 0.21 | 0.00 | 3.57 |
Landuse_row crops & veg | 7856 | 1999–2008 | 0.02 | 0.05 | 0.00 | 0.80 |
PropAL | 9974 | 1999–2008 | 0.46 | 0.31 | 0.00 | 5.20 |
Farming_system | 9228 | 1999–2008 | 1.87 | 0.21 | 1.00 | 2.00 |
Landcover_grassland | 1087 | Time constant | 0.09 | 0.13 | 0.00 | 0.79 |
Landcover_cropland | 1087 | Time constant | 0.24 | 0.29 | 0.00 | 0.97 |
Landcover_buildings | 1087 | Time constant | 0.09 | 0.12 | 0.00 | 0.98 |
Landcover_forest | 1087 | Time constant | 0.45 | 0.28 | 0.00 | 0.96 |
fwc | 1087 | Time constant | 0.38 | 0.04 | 0.27 | 0.47 |
vs | 1087 | Time constant | 8.63 | 4.07 | 1.00 | 15.00 |
Nbal | 4870 | 2003–2007 | 39.99 | 24.05 | −28.24 | 143.69 |
Fert | 4870 | 2003–2007 | 99.20 | 42.98 | 0.08 | 181.92 |
Withd | 4870 | 2003–2007 | 99.76 | 29.88 | 0.02 | 172.61 |