Precipitation during the wettest quarter 0.178406 Precipitation during the hottest quarter 0.525179 Carbon content of soil 0.694361 Precipitation during the driest quarter 0.781405 Nitrogen content of soil 0.9882 Precipitation during the coldest quarter 1.04267 Compound topographic index (relative wetness) 1.36391 Ratio of precipitation to potential evapotranspiration 1.36561 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 2.15218 Day/night diurnal temperature difference 2.24219 Temperature during the coldest quarter 2.38458 Temperature during the hottest quarter 2.6286 Sum of monthly Tavg where Tavg >=5 deg C 2.95089 Bulk density of soil 3.67699 Available water holding capacity of soil 4.53345 Solar interception 13.4378