Precipitation during the hottest quarter 0.156859
Day/night diurnal temperature difference 0.175469
Carbon content of soil 0.194254
Nitrogen content of soil 0.261804
Sum of monthly Tavg where Tavg >=5 deg C 0.312273
Precipitation during the wettest quarter 0.335688
Precipitation during the driest quarter 0.343641
Precipitation during the coldest quarter 0.414112
Ratio of precipitation to potential evapotranspiration 0.467802
Available water holding capacity of soil 0.50688
Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 0.520863
Bulk density of soil 0.695454
Temperature during the hottest quarter 0.84229
Compound topographic index (relative wetness) 0.969744
Solar interception 1.146
Temperature during the coldest quarter 2.27807