Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 1.02784 Nitrogen content of soil 1.06315 Precipitation during the driest quarter 1.10226 Compound topographic index (relative wetness) 1.21111 Elevation 1.40405 Temperature during the hottest quarter 1.45573 Precipitation during the wettest quarter 1.54101 Available water holding capacity of soil 1.66773 Carbon content of soil 2.09945 Solar interception 2.55181 Bulk density of soil 2.67768 Ratio of precipitation to potential evapotranspiration 3.49704 Temperature during the coldest quarter 3.6592 Sum of monthly Tavg where Tavg >=5 deg C 3.70534 Precipitation during the coldest quarter 3.99518 Precipitation during the hottest quarter 5.1005 Day/night diurnal temperature difference 5.28344