Precipitation during the hottest quarter 0.804598 Precipitation during the driest quarter 0.853556 Compound topographic index (relative wetness) 1.01089 Nitrogen content of soil 1.0149 Sum of monthly Tavg where Tavg >=5 deg C 1.1034 Precipitation during the coldest quarter 1.2504 Available water holding capacity of soil 1.45438 Temperature during the coldest quarter 1.62301 Solar interception 1.67428 Precipitation during the wettest quarter 1.91595 Ratio of precipitation to potential evapotranspiration 2.0199 Elevation 2.57953 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 3.63385 Temperature during the hottest quarter 3.79361 Carbon content of soil 4.91866 Bulk density of soil 6.1209 Day/night diurnal temperature difference 10.0645