Day/night diurnal temperature difference 0.1573 Compound topographic index (relative wetness) 0.56013 Nitrogen content of soil 0.563083 Precipitation during the driest quarter 0.683709 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 0.762599 Precipitation during the coldest quarter 0.766521 Precipitation during the wettest quarter 0.787979 Temperature during the hottest quarter 0.905117 Ratio of precipitation to potential evapotranspiration 0.920869 Available water holding capacity of soil 1.09251 Carbon content of soil 1.11182 Precipitation during the hottest quarter 1.11883 Elevation 1.32727 Solar interception 1.37051 Bulk density of soil 2.29107 Sum of monthly Tavg where Tavg >=5 deg C 2.37769 Temperature during the coldest quarter 3.9315