Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 1.05594 Nitrogen content of soil 1.07685 Compound topographic index (relative wetness) 1.09394 Precipitation during the driest quarter 1.14322 Elevation 1.37324 Temperature during the hottest quarter 1.48766 Available water holding capacity of soil 1.64621 Precipitation during the wettest quarter 1.70817 Carbon content of soil 2.01171 Bulk density of soil 2.53253 Solar interception 2.55181 Sum of monthly Tavg where Tavg >=5 deg C 3.47411 Ratio of precipitation to potential evapotranspiration 3.49704 Precipitation during the coldest quarter 3.99518 Temperature during the coldest quarter 4.18041 Precipitation during the hottest quarter 5.1005 Day/night diurnal temperature difference 5.28344