Precipitation during the wettest quarter 0.001741 Carbon content of soil 0.457255 Precipitation during the driest quarter 0.65429 Day/night diurnal temperature difference 0.661961 Nitrogen content of soil 0.676334 Precipitation during the hottest quarter 0.874267 Bulk density of soil 1.05506 Precipitation during the coldest quarter 1.08492 Ratio of precipitation to potential evapotranspiration 1.34442 Compound topographic index (relative wetness) 1.57169 Available water holding capacity of soil 1.64278 Temperature during the hottest quarter 1.83858 Temperature during the coldest quarter 2.28093 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 2.61512 Sum of monthly Tavg where Tavg >=5 deg C 3.05057 Solar interception 6.77472