Precipitation during the hottest quarter 0.933301 Nitrogen content of soil 0.936919 Precipitation during the coldest quarter 1.20796 Sum of monthly Tavg where Tavg >=5 deg C 1.37419 Precipitation during the driest quarter 1.42706 Compound topographic index (relative wetness) 1.51648 Available water holding capacity of soil 1.59096 Solar interception 1.75743 Temperature during the coldest quarter 1.93992 Precipitation during the wettest quarter 2.02643 Ratio of precipitation to potential evapotranspiration 2.02684 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 2.1408 Elevation 2.79025 Temperature during the hottest quarter 3.29358 Carbon content of soil 3.57322 Bulk density of soil 3.87759 Day/night diurnal temperature difference 9.80444