Nitrogen content of soil 0.524081 Precipitation during the hottest quarter 0.572876 Available water holding capacity of soil 0.602208 Sum of monthly Tavg where Tavg >=5 deg C 0.677703 Precipitation during the coldest quarter 0.689098 Precipitation during the driest quarter 0.791654 Ratio of precipitation to potential evapotranspiration 1.02777 Solar interception 1.16768 Precipitation during the wettest quarter 1.23723 Compound topographic index (relative wetness) 1.47453 Elevation 1.80722 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 1.97995 Carbon content of soil 2.38855 Temperature during the coldest quarter 3.00895 Temperature during the hottest quarter 3.05049 Bulk density of soil 3.45463 Day/night diurnal temperature difference 6.51827