Precipitation during the hottest quarter 0.614126 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 0.857004 Carbon content of soil 1.01229 Precipitation during the driest quarter 1.06162 Precipitation during the coldest quarter 1.13189 Nitrogen content of soil 1.16608 Compound topographic index (relative wetness) 1.21205 Temperature during the hottest quarter 1.37409 Ratio of precipitation to potential evapotranspiration 1.47404 Temperature during the coldest quarter 1.84243 Precipitation during the wettest quarter 2.00677 Day/night diurnal temperature difference 2.48438 Sum of monthly Tavg where Tavg >=5 deg C 3.6928 Bulk density of soil 5.76919 Available water holding capacity of soil 6.08937 Solar interception 7.95452