Carbon content of soil 1.34339 Precipitation during the driest quarter 1.37256 Nitrogen content of soil 1.73734 Temperature during the hottest quarter 1.86144 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 1.97371 Precipitation during the wettest quarter 2.11706 Ratio of precipitation to potential evapotranspiration 2.59493 Compound topographic index (relative wetness) 2.63236 Temperature during the coldest quarter 3.1207 Day/night diurnal temperature difference 3.52119 Precipitation during the hottest quarter 3.82948 Precipitation during the coldest quarter 4.00914 Sum of monthly Tavg where Tavg >=5 deg C 4.34589 Bulk density of soil 6.40716 Available water holding capacity of soil 7.21569 Solar interception 10.3305