Day/night diurnal temperature difference 0.196186 Available water holding capacity of soil 0.229065 Temperature during the hottest quarter 0.320754 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 0.415339 Compound topographic index (relative wetness) 0.470391 Nitrogen content of soil 0.519516 Precipitation during the hottest quarter 0.529404 Carbon content of soil 0.580043 Elevation 0.606727 Solar interception 0.610777 Precipitation during the coldest quarter 0.789403 Precipitation during the driest quarter 0.791716 Ratio of precipitation to potential evapotranspiration 0.928413 Precipitation during the wettest quarter 1.04164 Sum of monthly Tavg where Tavg >=5 deg C 1.10555 Temperature during the coldest quarter 1.23425 Bulk density of soil 1.47666