Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 1.08273 Precipitation during the driest quarter 1.23356 Nitrogen content of soil 1.29808 Compound topographic index (relative wetness) 1.31954 Elevation 1.42827 Temperature during the hottest quarter 1.49172 Precipitation during the wettest quarter 1.53662 Available water holding capacity of soil 1.67232 Carbon content of soil 2.46239 Solar interception 2.55181 Bulk density of soil 2.68125 Ratio of precipitation to potential evapotranspiration 3.49921 Sum of monthly Tavg where Tavg >=5 deg C 3.71003 Precipitation during the coldest quarter 3.99518 Precipitation during the hottest quarter 5.10523 Temperature during the coldest quarter 5.59084 Day/night diurnal temperature difference 7.64023