Precipitation during the driest quarter 1.09042 Nitrogen content of soil 1.19985 Carbon content of soil 1.62293 Precipitation during the wettest quarter 1.73693 Compound topographic index (relative wetness) 2.62057 Ratio of precipitation to potential evapotranspiration 2.66619 Day/night diurnal temperature difference 2.7607 Temperature during the coldest quarter 2.97899 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 3.23089 Precipitation during the hottest quarter 3.59791 Precipitation during the coldest quarter 3.71537 Sum of monthly Tavg where Tavg >=5 deg C 4.08279 Temperature during the hottest quarter 4.97536 Bulk density of soil 6.91225 Available water holding capacity of soil 7.3504 Solar interception 9.8405