Day/night diurnal temperature difference 0.071123 Precipitation during the wettest quarter 0.11053 Temperature during the hottest quarter 0.240598 Compound topographic index (relative wetness) 0.326337 Nitrogen content of soil 0.392938 Precipitation during the driest quarter 0.447274 Precipitation during the coldest quarter 0.506792 Carbon content of soil 0.525288 Precipitation during the hottest quarter 0.541854 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 0.565576 Sum of monthly Tavg where Tavg >=5 deg C 0.61158 Elevation 0.613016 Ratio of precipitation to potential evapotranspiration 0.62532 Bulk density of soil 0.82242 Solar interception 0.932052 Available water holding capacity of soil 1.55443 Temperature during the coldest quarter 1.76315