Temperature during the hottest quarter 0.371245 Available water holding capacity of soil 0.732629 Carbon content of soil 1.07797 Precipitation during the driest quarter 1.12941 Precipitation during the wettest quarter 1.15137 Nitrogen content of soil 1.38599 Day/night diurnal temperature difference 1.41064 Temperature during the coldest quarter 1.49125 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 2.00407 Bulk density of soil 2.06266 Ratio of precipitation to potential evapotranspiration 2.27114 Compound topographic index (relative wetness) 2.35655 Sum of monthly Tavg where Tavg >=5 deg C 2.38701 Precipitation during the hottest quarter 3.60942 Precipitation during the coldest quarter 3.82394 Solar interception 8.58835