Carbon content of soil 0.675503 Precipitation during the driest quarter 1.01509 Nitrogen content of soil 1.44284 Precipitation during the wettest quarter 1.87955 Temperature during the coldest quarter 2.11108 Compound topographic index (relative wetness) 2.63236 Day/night diurnal temperature difference 2.64865 Ratio of precipitation to potential evapotranspiration 2.73929 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 3.48984 Precipitation during the coldest quarter 3.75586 Precipitation during the hottest quarter 3.80909 Sum of monthly Tavg where Tavg >=5 deg C 4.00666 Temperature during the hottest quarter 4.84634 Available water holding capacity of soil 6.32807 Bulk density of soil 6.76231 Solar interception 9.8405