Precipitation during the hottest quarter 0.404196 Precipitation during the coldest quarter 0.419656 Bulk density of soil 0.621834 Ratio of precipitation to potential evapotranspiration 0.635767 Sum of monthly Tavg where Tavg >=5 deg C 0.706575 Solar interception 0.90103 Compound topographic index (relative wetness) 1.10358 Nitrogen content of soil 1.11473 Temperature during the coldest quarter 1.38924 Carbon content of soil 1.413 Precipitation during the wettest quarter 1.5321 Precipitation during the driest quarter 1.53561 Temperature during the hottest quarter 1.61253 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 1.70478 Elevation 1.72328 Available water holding capacity of soil 1.8442 Day/night diurnal temperature difference 7.85379