Precipitation during the wettest quarter 0.059153 Ratio of precipitation to potential evapotranspiration 0.150815 Solar interception 0.172092 Precipitation during the coldest quarter 0.182916 Precipitation during the hottest quarter 0.214825 Sum of monthly Tavg where Tavg >=5 deg C 0.397489 Nitrogen content of soil 0.531431 Bulk density of soil 0.583333 Carbon content of soil 0.646027 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 0.650082 Precipitation during the driest quarter 0.777371 Compound topographic index (relative wetness) 0.946034 Available water holding capacity of soil 0.996063 Temperature during the coldest quarter 1.37835 Elevation 1.39134 Temperature during the hottest quarter 1.85928 Day/night diurnal temperature difference 2.97686