Precipitation during the hottest quarter 0.393388
Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 0.569179
Nitrogen content of soil 0.636808
Carbon content of soil 0.652939
Temperature during the hottest quarter 0.846678
Precipitation during the coldest quarter 0.873718
Precipitation during the driest quarter 0.985101
Compound topographic index (relative wetness) 1.08363
Precipitation during the wettest quarter 1.29124
Ratio of precipitation to potential evapotranspiration 1.58938
Temperature during the coldest quarter 1.81172
Sum of monthly Tavg where Tavg >=5 deg C 2.37258
Day/night diurnal temperature difference 2.47002
Bulk density of soil 2.69824
Available water holding capacity of soil 3.81384
Solar interception 5.73868