Precipitation during the wettest quarter 0.226686 Available water holding capacity of soil 0.260599 Precipitation during the hottest quarter 0.285552 Nitrogen content of soil 0.302733 Sum of monthly Tavg where Tavg >=5 deg C 0.34966 Precipitation during the driest quarter 0.571698 Precipitation during the coldest quarter 0.57603 Compound topographic index (relative wetness) 0.829006 Solar interception 0.875639 Temperature during the hottest quarter 0.925782 Ratio of precipitation to potential evapotranspiration 0.961617 Elevation 1.10601 Temperature during the coldest quarter 1.41281 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 1.73591 Carbon content of soil 1.80618 Day/night diurnal temperature difference 2.58308 Bulk density of soil 2.77139