Precipitation during the hottest quarter 0.307565 Available water holding capacity of soil 0.499858 Precipitation during the coldest quarter 0.512185 Nitrogen content of soil 0.535697 Ratio of precipitation to potential evapotranspiration 0.567222 Sum of monthly Tavg where Tavg >=5 deg C 0.814159 Solar interception 0.819142 Precipitation during the wettest quarter 0.939869 Precipitation during the driest quarter 0.989541 Compound topographic index (relative wetness) 1.49883 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 1.96007 Temperature during the hottest quarter 2.0927 Elevation 2.10944 Carbon content of soil 2.17543 Bulk density of soil 2.64789 Temperature during the coldest quarter 3.31063 Day/night diurnal temperature difference 5.01642