Precipitation during the driest quarter 0.049767 Precipitation during the coldest quarter 0.105346 Compound topographic index (relative wetness) 0.177964 Precipitation during the hottest quarter 0.197083 Carbon content of soil 0.225313 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 0.260493 Temperature during the coldest quarter 0.26494 Precipitation during the wettest quarter 0.270954 Ratio of precipitation to potential evapotranspiration 0.2942 Day/night diurnal temperature difference 0.315264 Nitrogen content of soil 0.348549 Temperature during the hottest quarter 0.420992 Sum of monthly Tavg where Tavg >=5 deg C 1.48321 Bulk density of soil 2.15232 Available water holding capacity of soil 2.45563 Solar interception 3.97895