Carbon content of soil 0.417844 Precipitation during the coldest quarter 0.555451 Sum of monthly Tavg where Tavg >=5 deg C 0.579165 Precipitation during the driest quarter 0.591542 Ratio of precipitation to potential evapotranspiration 0.650456 Available water holding capacity of soil 0.738896 Precipitation during the hottest quarter 0.762839 Nitrogen content of soil 0.798025 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 0.908716 Temperature during the hottest quarter 0.928912 Precipitation during the wettest quarter 0.998972 Compound topographic index (relative wetness) 1.00738 Bulk density of soil 1.48294 Temperature during the coldest quarter 1.50992 Day/night diurnal temperature difference 1.61461 Solar interception 4.7595