Precipitation during the wettest quarter 0 Day/night diurnal temperature difference 0.159202 Precipitation during the driest quarter 0.21321 Compound topographic index (relative wetness) 0.297208 Nitrogen content of soil 0.30995 Temperature during the hottest quarter 0.584536 Elevation 0.848168 Carbon content of soil 0.925872 Bulk density of soil 0.99353 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 1.32878 Temperature during the coldest quarter 1.5785 Sum of monthly Tavg where Tavg >=5 deg C 1.58908 Ratio of precipitation to potential evapotranspiration 2.15795 Solar interception 2.5782 Available water holding capacity of soil 2.83293 Precipitation during the hottest quarter 3.51744 Precipitation during the coldest quarter 3.74017