Available water holding capacity of soil 0.644342 Precipitation during the wettest quarter 0.708759 Temperature during the hottest quarter 0.748782 Carbon content of soil 0.858583 Ratio of precipitation to potential evapotranspiration 0.870187 Precipitation during the coldest quarter 1.07829 Precipitation during the driest quarter 1.10566 Nitrogen content of soil 1.1287 Compound topographic index (relative wetness) 1.16231 Bulk density of soil 1.17745 Sum of monthly Tavg where Tavg >=5 deg C 1.26569 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 1.33866 Precipitation during the hottest quarter 1.55069 Temperature during the coldest quarter 2.01357 Day/night diurnal temperature difference 2.03012 Solar interception 5.18147