Precipitation during the hottest quarter 0.351987 Available water holding capacity of soil 0.354757 Precipitation during the coldest quarter 0.376618 Solar interception 0.405987 Ratio of precipitation to potential evapotranspiration 0.428663 Nitrogen content of soil 0.482534 Sum of monthly Tavg where Tavg >=5 deg C 0.530057 Precipitation during the driest quarter 0.930923 Compound topographic index (relative wetness) 1.03344 Precipitation during the wettest quarter 1.04192 Temperature during the hottest quarter 1.49488 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 1.85844 Elevation 1.95036 Temperature during the coldest quarter 2.27256 Carbon content of soil 2.39096 Bulk density of soil 3.28378 Day/night diurnal temperature difference 5.73548