Precipitation during the wettest quarter 0.059662 Available water holding capacity of soil 0.788667 Carbon content of soil 0.825206 Temperature during the hottest quarter 1.08755 Precipitation during the driest quarter 1.34426 Nitrogen content of soil 1.41552 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 1.90558 Temperature during the coldest quarter 2.12454 Ratio of precipitation to potential evapotranspiration 2.27114 Day/night diurnal temperature difference 2.30526 Compound topographic index (relative wetness) 2.35655 Bulk density of soil 2.6534 Sum of monthly Tavg where Tavg >=5 deg C 2.69743 Precipitation during the hottest quarter 3.75754 Precipitation during the coldest quarter 3.87766 Solar interception 9.08164