Precipitation during the wettest quarter 0.725338 Elevation 0.886019 Compound topographic index (relative wetness) 0.969143 Precipitation during the hottest quarter 1.14617 Nitrogen content of soil 1.17999 Temperature during the coldest quarter 1.18927 Precipitation during the coldest quarter 1.521 Precipitation during the driest quarter 1.58069 Temperature during the hottest quarter 1.99364 Ratio of precipitation to potential evapotranspiration 2.61805 Solar interception 2.64471 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 3.53119 Carbon content of soil 4.04158 Available water holding capacity of soil 4.92891 Bulk density of soil 6.00193 Sum of monthly Tavg where Tavg >=5 deg C 6.8058 Day/night diurnal temperature difference 12.9018