Precipitation during the hottest quarter 0.365974 Precipitation during the coldest quarter 0.41463 Bulk density of soil 0.549571 Sum of monthly Tavg where Tavg >=5 deg C 0.59101 Ratio of precipitation to potential evapotranspiration 0.633677 Solar interception 0.907374 Nitrogen content of soil 1.01255 Temperature during the coldest quarter 1.0627 Precipitation during the wettest quarter 1.23164 Compound topographic index (relative wetness) 1.23406 Carbon content of soil 1.23919 Precipitation during the driest quarter 1.50046 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 1.53731 Elevation 2.00409 Available water holding capacity of soil 2.00549 Temperature during the hottest quarter 2.00736 Day/night diurnal temperature difference 7.9256