Precipitation during the hottest quarter 0.725383 Temperature during the hottest quarter 1.1497 Precipitation during the coldest quarter 1.17354 Precipitation during the driest quarter 1.33116 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 1.50435 Nitrogen content of soil 1.55502 Carbon content of soil 1.79866 Precipitation during the wettest quarter 2.06053 Ratio of precipitation to potential evapotranspiration 2.09578 Compound topographic index (relative wetness) 2.33441 Temperature during the coldest quarter 2.85283 Sum of monthly Tavg where Tavg >=5 deg C 2.93809 Day/night diurnal temperature difference 3.08468 Bulk density of soil 4.50948 Available water holding capacity of soil 5.07088 Solar interception 8.83271