Carbon content of soil 0.730097 Precipitation during the driest quarter 0.832971 Precipitation during the coldest quarter 0.931049 Sum of monthly Tavg where Tavg >=5 deg C 0.939237 Nitrogen content of soil 1.13765 Precipitation during the hottest quarter 1.1567 Precipitation during the wettest quarter 1.23757 Day/night diurnal temperature difference 1.42489 Ratio of precipitation to potential evapotranspiration 1.53894 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 1.61009 Bulk density of soil 1.737 Compound topographic index (relative wetness) 1.96938 Available water holding capacity of soil 1.97328 Temperature during the hottest quarter 2.70221 Temperature during the coldest quarter 3.51256 Solar interception 6.68727