Precipitation during the wettest quarter 0.001913 Nitrogen content of soil 0.431485 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 0.541194 Carbon content of soil 0.663717 Precipitation during the driest quarter 0.715337 Ratio of precipitation to potential evapotranspiration 0.784498 Bulk density of soil 0.803757 Available water holding capacity of soil 0.831899 Elevation 0.849396 Compound topographic index (relative wetness) 0.884951 Solar interception 0.968433 Precipitation during the coldest quarter 1.11821 Precipitation during the hottest quarter 1.2043 Sum of monthly Tavg where Tavg >=5 deg C 1.24035 Temperature during the hottest quarter 1.49072 Day/night diurnal temperature difference 2.06102 Temperature during the coldest quarter 2.07189