Precipitation during the wettest quarter 0.019253 Temperature during the coldest quarter 0.498857 Precipitation during the hottest quarter 0.702468 Ratio of precipitation to potential evapotranspiration 0.753953 Nitrogen content of soil 0.846792 Compound topographic index (relative wetness) 0.855836 Precipitation during the coldest quarter 0.880843 Bulk density of soil 0.974514 Precipitation during the driest quarter 0.988027 Solar interception 1.00879 Sum of monthly Tavg where Tavg >=5 deg C 1.45516 Elevation 1.91188 Carbon content of soil 2.20501 Available water holding capacity of soil 2.29483 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 2.48547 Temperature during the hottest quarter 2.53186 Day/night diurnal temperature difference 7.68695