Carbon content of soil 0.467056 Nitrogen content of soil 0.471 Precipitation during the driest quarter 0.47954 Precipitation during the hottest quarter 0.482889 Precipitation during the coldest quarter 0.500561 Precipitation during the wettest quarter 0.592795 Day/night diurnal temperature difference 0.637154 Sum of monthly Tavg where Tavg >=5 deg C 0.784091 Ratio of precipitation to potential evapotranspiration 0.918889 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 1.42702 Available water holding capacity of soil 1.69147 Bulk density of soil 1.737 Compound topographic index (relative wetness) 1.7726 Temperature during the coldest quarter 2.01876 Temperature during the hottest quarter 2.07745 Solar interception 3.74531