Precipitation during the hottest quarter 0.419209 Precipitation during the driest quarter 0.856993 Precipitation during the coldest quarter 1.12442 Nitrogen content of soil 1.13715 Carbon content of soil 1.35468 Compound topographic index (relative wetness) 1.58079 Temperature during the hottest quarter 1.67518 Precipitation during the wettest quarter 1.79313 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 1.79347 Ratio of precipitation to potential evapotranspiration 1.92154 Temperature during the coldest quarter 2.00411 Day/night diurnal temperature difference 2.04982 Sum of monthly Tavg where Tavg >=5 deg C 3.99671 Bulk density of soil 5.34399 Available water holding capacity of soil 7.3504 Solar interception 7.82993