Precipitation during the hottest quarter 0.385625
Carbon content of soil 0.424391
Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 0.430321
Sum of monthly Tavg where Tavg >=5 deg C 0.511967
Nitrogen content of soil 0.539603
Temperature during the hottest quarter 0.58302
Bulk density of soil 0.671844
Ratio of precipitation to potential evapotranspiration 0.699554
Precipitation during the coldest quarter 0.72406
Precipitation during the driest quarter 0.725489
Solar interception 0.757498
Precipitation during the wettest quarter 0.760456
Day/night diurnal temperature difference 0.83199
Compound topographic index (relative wetness) 0.996767
Available water holding capacity of soil 1.15793
Temperature during the coldest quarter 1.51824