Nitrogen content of soil 0.908875
Ratio of precipitation to potential evapotranspiration 0.910745
Sum of monthly Tavg where Tavg >=5 deg C 1.00246
Carbon content of soil 1.06997
Precipitation during the coldest quarter 1.18915
Precipitation during the driest quarter 1.21411
Precipitation during the wettest quarter 1.29694
Compound topographic index (relative wetness) 1.34102
Day/night diurnal temperature difference 1.52922
Bulk density of soil 1.56389
Precipitation during the hottest quarter 1.64394
Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 2.02249
Available water holding capacity of soil 2.40245
Temperature during the hottest quarter 2.6258
Solar interception 2.92821
Temperature during the coldest quarter 5.16659