Precipitation during the driest quarter 0.660125 Sum of monthly Tavg where Tavg >=5 deg C 0.701011 Precipitation during the wettest quarter 1.02109 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 1.15803 Nitrogen content of soil 1.18279 Carbon content of soil 1.30334 Available water holding capacity of soil 1.69554 Bulk density of soil 1.93344 Day/night diurnal temperature difference 2.02223 Temperature during the hottest quarter 2.35129 Precipitation during the coldest quarter 3.9966 Temperature during the coldest quarter 4.75011 Precipitation during the hottest quarter 5.16621 Ratio of precipitation to potential evapotranspiration 5.33467 Compound topographic index (relative wetness) 5.60487 Solar interception 5.8651