Precipitation during the wettest quarter 0.037809 Available water holding capacity of soil 0.108665 Precipitation during the hottest quarter 0.133892 Sum of monthly Tavg where Tavg >=5 deg C 0.169718 Compound topographic index (relative wetness) 0.241849 Precipitation during the driest quarter 0.272513 Nitrogen content of soil 0.274829 Temperature during the hottest quarter 0.300465 Precipitation during the coldest quarter 0.416762 Temperature during the coldest quarter 0.460613 Ratio of precipitation to potential evapotranspiration 0.693625 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 0.740775 Carbon content of soil 0.760129 Solar interception 0.858331 Bulk density of soil 1.19357 Day/night diurnal temperature difference 1.91117 Elevation 1.92942