Precipitation during the hottest quarter 0.551515 Nitrogen content of soil 0.577009 Precipitation during the driest quarter 0.779285 Compound topographic index (relative wetness) 0.796871 Available water holding capacity of soil 0.896566 Precipitation during the coldest quarter 1.01582 Solar interception 1.11997 Sum of monthly Tavg where Tavg >=5 deg C 1.18109 Ratio of precipitation to potential evapotranspiration 1.24964 Precipitation during the wettest quarter 1.63312 Elevation 1.66653 Temperature during the hottest quarter 1.82506 Temperature during the coldest quarter 1.97435 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 3.46312 Carbon content of soil 4.65987 Bulk density of soil 5.38369 Day/night diurnal temperature difference 7.72134