Solar interception 0.424503 Nitrogen content of soil 0.719502 Temperature during the hottest quarter 0.89057 Sum of monthly Tavg where Tavg >=5 deg C 0.931648 Carbon content of soil 0.959001 Bulk density of soil 0.9703 Available water holding capacity of soil 0.978851 Day/night diurnal temperature difference 1.0257 Precipitation during the wettest quarter 1.19007 Precipitation during the driest quarter 1.1926 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 1.88146 Temperature during the coldest quarter 2.64843 Compound topographic index (relative wetness) 2.97853 Precipitation during the coldest quarter 3.35643 Precipitation during the hottest quarter 3.90057 Ratio of precipitation to potential evapotranspiration 4.30183