Available water holding capacity of soil 0.839381 Temperature during the hottest quarter 1.03455 Precipitation during the hottest quarter 1.15863 Carbon content of soil 1.27529 Bulk density of soil 1.28768 Precipitation during the driest quarter 1.48023 Nitrogen content of soil 1.49115 Precipitation during the coldest quarter 1.50856 Precipitation during the wettest quarter 1.62636 Sum of monthly Tavg where Tavg >=5 deg C 1.77806 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 1.82548 Temperature during the coldest quarter 1.96031 Compound topographic index (relative wetness) 2.17177 Ratio of precipitation to potential evapotranspiration 2.40731 Day/night diurnal temperature difference 3.11893 Solar interception 6.96795