Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 0.93612 Compound topographic index (relative wetness) 0.950496 Nitrogen content of soil 1.00892 Elevation 1.13291 Temperature during the hottest quarter 1.21725 Precipitation during the driest quarter 1.2334 Precipitation during the wettest quarter 1.24551 Carbon content of soil 1.89382 Available water holding capacity of soil 1.97134 Bulk density of soil 2.05035 Ratio of precipitation to potential evapotranspiration 2.15955 Sum of monthly Tavg where Tavg >=5 deg C 2.57857 Solar interception 2.58077 Precipitation during the coldest quarter 4.00523 Precipitation during the hottest quarter 4.08584 Day/night diurnal temperature difference 5.28344 Temperature during the coldest quarter 5.48572