Sum of monthly Tavg where Tavg >=5 deg C 0.291874
Nitrogen content of soil 0.39228
Precipitation during the driest quarter 0.415443
Precipitation during the hottest quarter 0.427996
Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 0.441495
Ratio of precipitation to potential evapotranspiration 0.469805
Carbon content of soil 0.482993
Bulk density of soil 0.560561
Precipitation during the wettest quarter 0.587929
Precipitation during the coldest quarter 0.658613
Temperature during the hottest quarter 0.6889
Solar interception 0.708596
Available water holding capacity of soil 0.789288
Day/night diurnal temperature difference 0.833096
Compound topographic index (relative wetness) 1.87482
Temperature during the coldest quarter 3.28788