Precipitation during the wettest quarter 0.10721 Precipitation during the driest quarter 0.129063 Solar interception 0.154994 Carbon content of soil 0.191263 Sum of monthly Tavg where Tavg >=5 deg C 0.331716 Nitrogen content of soil 0.410972 Precipitation during the coldest quarter 0.437132 Precipitation during the hottest quarter 0.563861 Ratio of precipitation to potential evapotranspiration 0.697121 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 0.736164 Day/night diurnal temperature difference 0.787449 Compound topographic index (relative wetness) 0.880001 Bulk density of soil 0.936471 Available water holding capacity of soil 1.16099 Temperature during the hottest quarter 1.71384 Temperature during the coldest quarter 3.84535