Precipitation during the hottest quarter 0.448668 Carbon content of soil 0.827237 Precipitation during the driest quarter 0.941113 Precipitation during the coldest quarter 0.978783 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 1.15154 Nitrogen content of soil 1.17041 Compound topographic index (relative wetness) 1.29996 Ratio of precipitation to potential evapotranspiration 1.58183 Precipitation during the wettest quarter 1.59044 Temperature during the hottest quarter 1.62208 Day/night diurnal temperature difference 2.27164 Temperature during the coldest quarter 2.83802 Sum of monthly Tavg where Tavg >=5 deg C 3.99318 Solar interception 5.29726 Bulk density of soil 5.31688 Available water holding capacity of soil 6.28021