Day/night diurnal temperature difference 0.162324
Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 0.224814
Nitrogen content of soil 0.334172
Ratio of precipitation to potential evapotranspiration 0.364309
Bulk density of soil 0.38438
Elevation 0.386952
Precipitation during the coldest quarter 0.402066
Precipitation during the hottest quarter 0.534672
Available water holding capacity of soil 0.54693
Solar interception 0.560118
Compound topographic index (relative wetness) 0.56456
Sum of monthly Tavg where Tavg >=5 deg C 0.58497
Temperature during the hottest quarter 0.611309
Precipitation during the driest quarter 0.656414
Precipitation during the wettest quarter 0.741422
Carbon content of soil 0.93777
Temperature during the coldest quarter 2.19857