Carbon content of soil 0.874995 Sum of monthly Tavg where Tavg >=5 deg C 0.940182 Nitrogen content of soil 0.962621 Day/night diurnal temperature difference 1.18094 Precipitation during the driest quarter 1.2415 Precipitation during the wettest quarter 1.25815 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 2.06287 Available water holding capacity of soil 2.12737 Ratio of precipitation to potential evapotranspiration 2.15952 Bulk density of soil 2.35947 Compound topographic index (relative wetness) 2.58024 Temperature during the hottest quarter 2.7653 Precipitation during the coldest quarter 4.0095 Precipitation during the hottest quarter 4.08397 Temperature during the coldest quarter 4.41509 Solar interception 4.60288