Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 0.740191 Precipitation during the coldest quarter 0.794929 Ratio of precipitation to potential evapotranspiration 0.818449 Nitrogen content of soil 1.06552 Solar interception 1.22279 Bulk density of soil 1.22811 Sum of monthly Tavg where Tavg >=5 deg C 1.32689 Compound topographic index (relative wetness) 1.43975 Precipitation during the driest quarter 1.55626 Precipitation during the hottest quarter 1.58369 Available water holding capacity of soil 1.58755 Precipitation during the wettest quarter 2.00415 Temperature during the hottest quarter 2.21453 Carbon content of soil 2.23142 Temperature during the coldest quarter 2.36898 Elevation 2.41509 Day/night diurnal temperature difference 9.80444