Day/night diurnal temperature difference 0.038688 Precipitation during the wettest quarter 0.238348 Temperature during the hottest quarter 0.246323 Compound topographic index (relative wetness) 0.277851 Nitrogen content of soil 0.815198 Carbon content of soil 0.907267 Precipitation during the driest quarter 0.921306 Elevation 0.946786 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 0.974454 Sum of monthly Tavg where Tavg >=5 deg C 1.6375 Bulk density of soil 1.66278 Available water holding capacity of soil 1.73625 Temperature during the coldest quarter 2.52985 Solar interception 2.8991 Precipitation during the coldest quarter 3.41768 Precipitation during the hottest quarter 3.73484 Ratio of precipitation to potential evapotranspiration 4.31197