Precipitation during the wettest quarter 0 Day/night diurnal temperature difference 0.088152 Compound topographic index (relative wetness) 0.251953 Temperature during the hottest quarter 0.256777 Precipitation during the coldest quarter 0.361181 Precipitation during the driest quarter 0.475135 Precipitation during the hottest quarter 0.526862 Ratio of precipitation to potential evapotranspiration 0.528347 Nitrogen content of soil 0.673364 Solar interception 0.859369 Carbon content of soil 0.860405 Elevation 1.03476 Sum of monthly Tavg where Tavg >=5 deg C 1.56782 Available water holding capacity of soil 1.57598 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 1.71342 Bulk density of soil 1.73396 Temperature during the coldest quarter 2.28437