Precipitation during the hottest quarter 0.375697 Bulk density of soil 0.576748 Carbon content of soil 0.738366 Nitrogen content of soil 0.761268 Precipitation during the coldest quarter 0.790662 Available water holding capacity of soil 0.86978 Temperature during the hottest quarter 0.892319 Precipitation during the driest quarter 0.990709 Sum of monthly Tavg where Tavg >=5 deg C 1.44933 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 1.47116 Compound topographic index (relative wetness) 1.52682 Ratio of precipitation to potential evapotranspiration 1.81836 Temperature during the coldest quarter 1.85253 Day/night diurnal temperature difference 1.94554 Precipitation during the wettest quarter 6.2e-05 Solar interception 7.18445