Precipitation during the wettest quarter 0 Nitrogen content of soil 0.687532 Precipitation during the hottest quarter 0.774244 Compound topographic index (relative wetness) 0.901322 Precipitation during the driest quarter 0.910597 Precipitation during the coldest quarter 1.21823 Solar interception 1.69457 Ratio of precipitation to potential evapotranspiration 1.86735 Temperature during the hottest quarter 1.95427 Elevation 2.24809 Carbon content of soil 2.43842 Available water holding capacity of soil 3.56245 Bulk density of soil 3.58295 Sum of monthly Tavg where Tavg >=5 deg C 3.65756 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 3.82661 Temperature during the coldest quarter 4.21404 Day/night diurnal temperature difference 4.38598