Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 0.755036 Available water holding capacity of soil 1.00919 Compound topographic index (relative wetness) 1.04494 Nitrogen content of soil 1.15496 Temperature during the hottest quarter 1.17708 Precipitation during the driest quarter 1.21193 Elevation 1.39158 Precipitation during the wettest quarter 1.5824 Carbon content of soil 1.92212 Bulk density of soil 2.25466 Solar interception 2.55181 Sum of monthly Tavg where Tavg >=5 deg C 2.57003 Ratio of precipitation to potential evapotranspiration 3.49921 Precipitation during the coldest quarter 3.99518 Day/night diurnal temperature difference 4.05468 Temperature during the coldest quarter 4.64619 Precipitation during the hottest quarter 5.10523