Nitrogen content of soil 0.395105 Precipitation during the hottest quarter 0.604249 Precipitation during the driest quarter 0.69465 Precipitation during the coldest quarter 0.707669 Available water holding capacity of soil 0.726632 Compound topographic index (relative wetness) 0.857358 Sum of monthly Tavg where Tavg >=5 deg C 1.09208 Precipitation during the wettest quarter 1.19582 Solar interception 1.24686 Ratio of precipitation to potential evapotranspiration 1.6791 Elevation 1.79375 Temperature during the hottest quarter 1.9508 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 2.34892 Carbon content of soil 2.94819 Temperature during the coldest quarter 3.16702 Bulk density of soil 3.5934 Day/night diurnal temperature difference 5.45342