Precipitation during the driest quarter 0.374571 Precipitation during the wettest quarter 0.474363 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 0.524492 Compound topographic index (relative wetness) 0.538544 Available water holding capacity of soil 0.582304 Temperature during the hottest quarter 0.63641 Nitrogen content of soil 0.708651 Elevation 0.907486 Day/night diurnal temperature difference 1.16421 Carbon content of soil 1.51052 Bulk density of soil 1.68529 Sum of monthly Tavg where Tavg >=5 deg C 1.89601 Precipitation during the coldest quarter 2.42431 Temperature during the coldest quarter 3.27407 Precipitation during the hottest quarter 4.22814 Ratio of precipitation to potential evapotranspiration 4.6942 Solar interception 5.01694