Carbon content of soil 0.863045 Sum of monthly Tavg where Tavg >=5 deg C 0.939237 Nitrogen content of soil 0.968666 Precipitation during the driest quarter 0.990133 Day/night diurnal temperature difference 1.1933 Precipitation during the wettest quarter 1.37626 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 1.5349 Ratio of precipitation to potential evapotranspiration 1.85998 Bulk density of soil 1.87997 Available water holding capacity of soil 1.97328 Compound topographic index (relative wetness) 2.55208 Temperature during the hottest quarter 2.70221 Precipitation during the hottest quarter 3.6687 Precipitation during the coldest quarter 3.92583 Temperature during the coldest quarter 4.14238 Solar interception 6.68727