Precipitation during the coldest quarter 0.386428 Precipitation during the hottest quarter 0.387404 Temperature during the coldest quarter 0.440674 Nitrogen content of soil 0.53927 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 0.720448 Ratio of precipitation to potential evapotranspiration 0.74251 Precipitation during the driest quarter 0.74898 Temperature during the hottest quarter 0.773504 Solar interception 0.874019 Available water holding capacity of soil 0.976163 Precipitation during the wettest quarter 0.986797 Compound topographic index (relative wetness) 1.07595 Elevation 1.21535 Bulk density of soil 1.65809 Sum of monthly Tavg where Tavg >=5 deg C 1.8973 Carbon content of soil 2.24347 Day/night diurnal temperature difference 8.67305