Precipitation during the hottest quarter 0.708832 Nitrogen content of soil 0.862751 Precipitation during the coldest quarter 0.867074 Ratio of precipitation to potential evapotranspiration 0.943453 Precipitation during the driest quarter 1.13729 Precipitation during the wettest quarter 1.2713 Compound topographic index (relative wetness) 1.29031 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 1.34439 Temperature during the hottest quarter 1.4758 Solar interception 1.69169 Elevation 1.79436 Available water holding capacity of soil 2.54331 Carbon content of soil 2.78566 Bulk density of soil 2.95173 Sum of monthly Tavg where Tavg >=5 deg C 3.81655 Temperature during the coldest quarter 4.0826 Day/night diurnal temperature difference 5.28344