Ratio of precipitation to potential evapotranspiration 0.120859
Compound topographic index (relative wetness) 0.222187
Available water holding capacity of soil 0.260106
Precipitation during the coldest quarter 0.277693
Temperature during the hottest quarter 0.355475
Precipitation during the hottest quarter 0.385415
Bulk density of soil 0.391023
Sum of monthly Tavg where Tavg >=5 deg C 0.399552
Carbon content of soil 0.730262
Nitrogen content of soil 0.773172
Precipitation during the wettest quarter 0.815887
Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 0.836872
Day/night diurnal temperature difference 1.05055
Precipitation during the driest quarter 1.21371
Solar interception 1.74108
Temperature during the coldest quarter 2.15217