Precipitation during the hottest quarter 0.66617 Precipitation during the coldest quarter 0.887079 Ratio of precipitation to potential evapotranspiration 0.951975 Carbon content of soil 0.981343 Nitrogen content of soil 0.993747 Precipitation during the driest quarter 1.11987 Sum of monthly Tavg where Tavg >=5 deg C 1.2898 Precipitation during the wettest quarter 1.37626 Day/night diurnal temperature difference 1.65069 Compound topographic index (relative wetness) 1.74806 Bulk density of soil 2.44431 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 2.51741 Available water holding capacity of soil 2.83964 Temperature during the hottest quarter 3.74049 Temperature during the coldest quarter 3.92099 Solar interception 4.60288