Day/night diurnal temperature difference 0.235711 Temperature during the hottest quarter 0.417765 Compound topographic index (relative wetness) 0.62232 Nitrogen content of soil 0.730368 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 0.743186 Ratio of precipitation to potential evapotranspiration 0.778997 Precipitation during the wettest quarter 0.833268 Precipitation during the driest quarter 0.887901 Precipitation during the coldest quarter 1.0047 Carbon content of soil 1.16235 Solar interception 1.18066 Elevation 1.18118 Precipitation during the hottest quarter 1.37132 Available water holding capacity of soil 1.8512 Bulk density of soil 2.05492 Sum of monthly Tavg where Tavg >=5 deg C 2.10382 Temperature during the coldest quarter 4.72413