Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 0.135277 Temperature during the hottest quarter 0.176887 Precipitation during the coldest quarter 0.244255 Ratio of precipitation to potential evapotranspiration 0.273814 Precipitation during the hottest quarter 0.286356 Precipitation during the driest quarter 0.348287 Compound topographic index (relative wetness) 0.351144 Carbon content of soil 0.368461 Nitrogen content of soil 0.36984 Temperature during the coldest quarter 0.42291 Precipitation during the wettest quarter 0.522163 Bulk density of soil 0.641229 Sum of monthly Tavg where Tavg >=5 deg C 0.749916 Day/night diurnal temperature difference 1.15827 Available water holding capacity of soil 1.211 Solar interception 4.91009