Precipitation during the wettest quarter 0.22411 Nitrogen content of soil 0.710235 Precipitation during the hottest quarter 0.723611 Compound topographic index (relative wetness) 0.867093 Precipitation during the coldest quarter 0.992292 Precipitation during the driest quarter 1.0152 Ratio of precipitation to potential evapotranspiration 1.429 Solar interception 1.66641 Bulk density of soil 1.75614 Elevation 1.77941 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 1.88927 Carbon content of soil 2.03635 Temperature during the coldest quarter 2.17996 Sum of monthly Tavg where Tavg >=5 deg C 2.19947 Temperature during the hottest quarter 2.74522 Available water holding capacity of soil 3.26091 Day/night diurnal temperature difference 6.63295