Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 0.651111 Nitrogen content of soil 0.661618 Compound topographic index (relative wetness) 0.882017 Precipitation during the driest quarter 1.00707 Precipitation during the wettest quarter 1.04083 Available water holding capacity of soil 1.34036 Elevation 1.35151 Ratio of precipitation to potential evapotranspiration 1.39266 Carbon content of soil 1.71029 Solar interception 1.98756 Bulk density of soil 2.49467 Temperature during the hottest quarter 2.6468 Sum of monthly Tavg where Tavg >=5 deg C 2.69759 Precipitation during the hottest quarter 3.8522 Precipitation during the coldest quarter 3.98267 Day/night diurnal temperature difference 4.05468 Temperature during the coldest quarter 5.28746