Precipitation during the wettest quarter 0.011934 Carbon content of soil 0.969863 Precipitation during the hottest quarter 1.11245 Available water holding capacity of soil 1.34679 Nitrogen content of soil 1.35131 Precipitation during the driest quarter 1.41457 Ratio of precipitation to potential evapotranspiration 1.54011 Precipitation during the coldest quarter 1.57128 Bulk density of soil 1.62343 Compound topographic index (relative wetness) 1.70477 Temperature during the hottest quarter 1.70904 Sum of monthly Tavg where Tavg >=5 deg C 2.82173 Temperature during the coldest quarter 2.87445 Day/night diurnal temperature difference 3.34732 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 4.73723 Solar interception 4.91931