Nitrogen content of soil 0.858033 Sum of monthly Tavg where Tavg >=5 deg C 0.939237 Carbon content of soil 0.962952 Precipitation during the driest quarter 1.06211 Precipitation during the wettest quarter 1.37626 Day/night diurnal temperature difference 1.40123 Ratio of precipitation to potential evapotranspiration 1.55031 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 1.58618 Bulk density of soil 1.90009 Compound topographic index (relative wetness) 2.39422 Available water holding capacity of soil 2.42935 Precipitation during the hottest quarter 3.26449 Temperature during the hottest quarter 3.36099 Precipitation during the coldest quarter 3.95998 Temperature during the coldest quarter 4.14238 Solar interception 6.68727