Sum of monthly Tavg where Tavg >=5 deg C 0.353409
Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 0.642775
Precipitation during the driest quarter 0.645855
Nitrogen content of soil 0.67781
Carbon content of soil 0.876224
Precipitation during the wettest quarter 0.885859
Available water holding capacity of soil 1.01676
Day/night diurnal temperature difference 1.04636
Bulk density of soil 1.04725
Temperature during the hottest quarter 1.10784
Precipitation during the coldest quarter 1.16217
Ratio of precipitation to potential evapotranspiration 1.27009
Precipitation during the hottest quarter 1.31622
Compound topographic index (relative wetness) 2.03268
Solar interception 2.59479
Temperature during the coldest quarter 3.5957