Solar interception 0.179154 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 0.237728 Nitrogen content of soil 0.40945 Sum of monthly Tavg where Tavg >=5 deg C 0.412081 Carbon content of soil 0.449201 Precipitation during the hottest quarter 0.508213 Day/night diurnal temperature difference 0.547467 Compound topographic index (relative wetness) 0.560336 Bulk density of soil 0.562815 Precipitation during the driest quarter 0.722918 Precipitation during the coldest quarter 0.784525 Ratio of precipitation to potential evapotranspiration 0.907516 Precipitation during the wettest quarter 0.949657 Temperature during the hottest quarter 1.15134 Temperature during the coldest quarter 1.18414 Available water holding capacity of soil 1.4288