Carbon content of soil 0.455132 Precipitation during the driest quarter 0.861622 Nitrogen content of soil 1.15799 Precipitation during the coldest quarter 1.38527 Precipitation during the wettest quarter 1.44897 Precipitation during the hottest quarter 1.529 Day/night diurnal temperature difference 1.87541 Compound topographic index (relative wetness) 1.98139 Ratio of precipitation to potential evapotranspiration 2.22555 Temperature during the coldest quarter 2.73061 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 3.37314 Solar interception 3.42392 Sum of monthly Tavg where Tavg >=5 deg C 3.84517 Temperature during the hottest quarter 4.40439 Available water holding capacity of soil 6.11067 Bulk density of soil 6.67024