Precipitation during the wettest quarter 0 Precipitation during the hottest quarter 0.209914 Sum of monthly Tavg where Tavg >=5 deg C 0.276726 Carbon content of soil 0.415353 Precipitation during the coldest quarter 0.446469 Ratio of precipitation to potential evapotranspiration 0.544357 Compound topographic index (relative wetness) 0.560897 Nitrogen content of soil 0.597478 Bulk density of soil 0.607867 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 0.659975 Solar interception 0.698535 Precipitation during the driest quarter 0.76713 Available water holding capacity of soil 0.795472 Temperature during the hottest quarter 1.22782 Temperature during the coldest quarter 1.50181 Day/night diurnal temperature difference 1.60279 Elevation 1.67458