Solar interception 0.037292
Carbon content of soil 0.091917
Precipitation during the coldest quarter 0.178576
Sum of monthly Tavg where Tavg >=5 deg C 0.371494
Ratio of precipitation to potential evapotranspiration 0.384713
Precipitation during the hottest quarter 0.384886
Precipitation during the driest quarter 0.44696
Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 0.515434
Precipitation during the wettest quarter 0.516847
Compound topographic index (relative wetness) 0.578336
Nitrogen content of soil 0.616752
Day/night diurnal temperature difference 0.733289
Bulk density of soil 0.795523
Temperature during the coldest quarter 1.06312
Temperature during the hottest quarter 1.34747
Available water holding capacity of soil 1.44322