Precipitation during the hottest quarter 0.891578 Temperature during the hottest quarter 0.905923 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 0.907332 Compound topographic index (relative wetness) 1.04862 Elevation 1.13174 Carbon content of soil 1.25222 Precipitation during the coldest quarter 1.27125 Precipitation during the driest quarter 1.31684 Nitrogen content of soil 1.31829 Precipitation during the wettest quarter 1.42057 Ratio of precipitation to potential evapotranspiration 1.58281 Available water holding capacity of soil 1.71728 Solar interception 1.87206 Bulk density of soil 2.36548 Sum of monthly Tavg where Tavg >=5 deg C 2.49137 Day/night diurnal temperature difference 3.01123 Temperature during the coldest quarter 4.39911