Precipitation during the hottest quarter 0.644154 Precipitation during the coldest quarter 1.01506 Precipitation during the driest quarter 1.10679 Temperature during the hottest quarter 1.23021 Nitrogen content of soil 1.25711 Carbon content of soil 1.26376 Compound topographic index (relative wetness) 1.40301 Precipitation during the wettest quarter 1.49406 Ratio of precipitation to potential evapotranspiration 1.72933 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 1.87877 Day/night diurnal temperature difference 2.34381 Temperature during the coldest quarter 2.88718 Sum of monthly Tavg where Tavg >=5 deg C 2.96164 Bulk density of soil 3.49826 Available water holding capacity of soil 5.42541 Solar interception 6.11873