Precipitation during the driest quarter 0.810365 Nitrogen content of soil 0.863608 Precipitation during the hottest quarter 0.9152 Precipitation during the coldest quarter 0.958614 Carbon content of soil 0.976396 Sum of monthly Tavg where Tavg >=5 deg C 1.00013 Precipitation during the wettest quarter 1.33428 Ratio of precipitation to potential evapotranspiration 1.55038 Day/night diurnal temperature difference 1.61678 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 1.6385 Compound topographic index (relative wetness) 1.87943 Bulk density of soil 2.16447 Available water holding capacity of soil 2.65064 Temperature during the coldest quarter 2.75689 Temperature during the hottest quarter 3.78254 Solar interception 4.87401