Precipitation during the wettest quarter 0 Day/night diurnal temperature difference 0.034637 Temperature during the hottest quarter 0.082141 Compound topographic index (relative wetness) 0.144844 Precipitation during the driest quarter 0.450484 Carbon content of soil 0.532801 Nitrogen content of soil 0.539789 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 0.649884 Elevation 0.898704 Available water holding capacity of soil 1.05508 Bulk density of soil 1.07774 Sum of monthly Tavg where Tavg >=5 deg C 1.12543 Temperature during the coldest quarter 2.19418 Solar interception 3.49747 Precipitation during the coldest quarter 3.74073 Ratio of precipitation to potential evapotranspiration 4.95283 Precipitation during the hottest quarter 6.61737