Precipitation during the wettest quarter 0.019275 Precipitation during the hottest quarter 0.586536 Nitrogen content of soil 0.775374 Precipitation during the coldest quarter 0.988386 Carbon content of soil 1.00054 Bulk density of soil 1.09758 Precipitation during the driest quarter 1.13584 Ratio of precipitation to potential evapotranspiration 1.25112 Compound topographic index (relative wetness) 1.28635 Available water holding capacity of soil 1.76136 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 2.41235 Sum of monthly Tavg where Tavg >=5 deg C 2.43067 Temperature during the hottest quarter 2.63746 Day/night diurnal temperature difference 2.79718 Temperature during the coldest quarter 4.42179 Solar interception 7.29319