Precipitation during the wettest quarter 0.006053 Day/night diurnal temperature difference 0.038532 Temperature during the hottest quarter 0.12428 Compound topographic index (relative wetness) 0.255533 Nitrogen content of soil 0.546671 Carbon content of soil 0.571634 Elevation 0.621563 Precipitation during the driest quarter 0.62967 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 0.634397 Sum of monthly Tavg where Tavg >=5 deg C 0.870177 Available water holding capacity of soil 1.07352 Bulk density of soil 1.08533 Temperature during the coldest quarter 2.5114 Solar interception 2.8991 Precipitation during the coldest quarter 3.41768 Precipitation during the hottest quarter 3.55939 Ratio of precipitation to potential evapotranspiration 4.31768