Carbon content of soil 0.465709
Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 0.474339
Sum of monthly Tavg where Tavg >=5 deg C 0.540186
Solar interception 0.552696
Precipitation during the coldest quarter 0.559607
Precipitation during the driest quarter 0.59662
Nitrogen content of soil 0.672072
Precipitation during the hottest quarter 0.740084
Ratio of precipitation to potential evapotranspiration 0.763639
Day/night diurnal temperature difference 0.84476
Bulk density of soil 0.93062
Precipitation during the wettest quarter 1.0145
Compound topographic index (relative wetness) 1.09888
Available water holding capacity of soil 1.98368
Temperature during the hottest quarter 2.066
Temperature during the coldest quarter 3.28017