Precipitation during the coldest quarter 0.632328 Precipitation during the hottest quarter 0.738778 Ratio of precipitation to potential evapotranspiration 0.743122 Temperature during the hottest quarter 0.860887 Sum of monthly Tavg where Tavg >=5 deg C 0.868915 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 0.965176 Carbon content of soil 1.01065 Compound topographic index (relative wetness) 1.155 Precipitation during the driest quarter 1.23733 Nitrogen content of soil 1.50536 Bulk density of soil 1.55693 Available water holding capacity of soil 1.63444 Precipitation during the wettest quarter 1.71098 Temperature during the coldest quarter 1.78463 Day/night diurnal temperature difference 1.92886 Solar interception 9.22147