Forest Site Productivity Among Soil Taxonomic Units in Northern Lower Michigan

Abstract

AbstractGrowth measurements (site index and cubic meter volume) and soil descriptions for 195 field plots on 12 soil taxa were obtained to evaluate the variation in tree growth of jack pine (Pinus banksiana L.), northern red oak (Quercus rubra L.), sugar maple (Acer saccharum Marsh.), and bigtooth aspen (Populas grandidentata Michx.) in northern lower Michigan.Jack pine had significant differences in growth among five of eight soil taxa. Red oak showed significant differences among four soil taxa. Sugar maple showed no significant differences in growth among five soil taxa. Bigtooth aspen exhibited significant differences in growth among four of eight soil taxa.Soil properties recorded for soil profile descriptions were related to the range in site index of each study species. Regression equations were developed for depth to mottling, depth to loamy sand lenses in sandy soils, and thickness of A and B horizons. The significance of the effect of the soil property on tree growth differed between species.Soil‐tree growth ratings are possible, but the precision is affected by the lack of significant site differences among soil taxa. Within soil taxa, variation should be recognized for some soil series.