Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 0.120984
Day/night diurnal temperature difference 0.232009
Available water holding capacity of soil 0.253206
Bulk density of soil 0.277312
Nitrogen content of soil 0.281433
Precipitation during the hottest quarter 0.286104
Precipitation during the driest quarter 0.387928
Elevation 0.405415
Sum of monthly Tavg where Tavg >=5 deg C 0.41728
Compound topographic index (relative wetness) 0.421292
Temperature during the hottest quarter 0.473454
Precipitation during the wettest quarter 0.501139
Carbon content of soil 0.587331
Ratio of precipitation to potential evapotranspiration 0.693226
Precipitation during the coldest quarter 0.700198
Solar interception 1.51123
Temperature during the coldest quarter 2.12162