Precipitation during the wettest quarter 0.79084 Ratio of precipitation to potential evapotranspiration 0.938931 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 1.03981 Compound topographic index (relative wetness) 1.13285 Carbon content of soil 1.15125 Precipitation during the driest quarter 1.1901 Precipitation during the coldest quarter 1.19594 Nitrogen content of soil 1.2071 Solar interception 1.33227 Bulk density of soil 1.38607 Available water holding capacity of soil 1.46633 Precipitation during the hottest quarter 1.52238 Sum of monthly Tavg where Tavg >=5 deg C 2.08431 Temperature during the hottest quarter 2.78783 Elevation 3.10678 Day/night diurnal temperature difference 3.49964 Temperature during the coldest quarter 4.77994