Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 1.44968 Temperature during the hottest quarter 1.5228 Elevation 1.72446 Compound topographic index (relative wetness) 1.75569 Nitrogen content of soil 1.75595 Precipitation during the wettest quarter 1.88661 Precipitation during the driest quarter 1.92529 Available water holding capacity of soil 2.44573 Carbon content of soil 2.58258 Bulk density of soil 2.67768 Solar interception 3.49793 Sum of monthly Tavg where Tavg >=5 deg C 3.70534 Precipitation during the coldest quarter 4.12764 Ratio of precipitation to potential evapotranspiration 4.9537 Temperature during the coldest quarter 6.2055 Precipitation during the hottest quarter 6.61816 Day/night diurnal temperature difference 7.64023