Precipitation during the wettest quarter 0.00084 Precipitation during the hottest quarter 0.586107 Compound topographic index (relative wetness) 0.63191 Precipitation during the driest quarter 0.635609 Nitrogen content of soil 0.659504 Bulk density of soil 1.04008 Sum of monthly Tavg where Tavg >=5 deg C 1.07271 Precipitation during the coldest quarter 1.17974 Carbon content of soil 1.20475 Ratio of precipitation to potential evapotranspiration 1.26961 Solar interception 1.43718 Available water holding capacity of soil 1.58924 Elevation 1.68148 Temperature during the hottest quarter 1.91047 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 2.51614 Temperature during the coldest quarter 4.79262 Day/night diurnal temperature difference 6.00273