Precipitation during the driest quarter 0.44847 Precipitation during the wettest quarter 0.710486 Precipitation during the hottest quarter 1.00775 Compound topographic index (relative wetness) 1.15318 Sum of monthly Tavg where Tavg >=5 deg C 1.19412 Precipitation during the coldest quarter 1.19946 Nitrogen content of soil 1.26396 Solar interception 1.59662 Available water holding capacity of soil 1.61018 Temperature during the coldest quarter 1.85431 Ratio of precipitation to potential evapotranspiration 1.8847 Elevation 2.29437 Temperature during the hottest quarter 2.31417 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 2.72074 Carbon content of soil 4.22918 Bulk density of soil 5.23635 Day/night diurnal temperature difference 7.69304