Day/night diurnal temperature difference 0.346736 Available water holding capacity of soil 0.388646 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 0.415939 Precipitation during the driest quarter 0.450003 Temperature during the hottest quarter 0.464662 Nitrogen content of soil 0.478093 Compound topographic index (relative wetness) 0.548611 Precipitation during the hottest quarter 0.587443 Precipitation during the wettest quarter 0.604379 Carbon content of soil 0.715767 Ratio of precipitation to potential evapotranspiration 0.729398 Precipitation during the coldest quarter 0.748198 Elevation 0.899512 Solar interception 1.47145 Bulk density of soil 1.73548 Sum of monthly Tavg where Tavg >=5 deg C 1.92878 Temperature during the coldest quarter 4.69707