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In this experiment we studied the effect of nitrogen fertilizer and soil on the nutrient content of foliage and average basal area growth of red spruce (Picea rubens Sarg.) trees in stands that were approaching economic maturity. These trees were on three common soil series of eastern and central Maine. We conducted foliage analyses for 5 years after fertilization, and measured the basal area growth for 9 years after treatment.
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Maine Agricultural and Forest Experiment Station
Forest management, Fertilizers
Safford, L.O.; Young, H.E.; and Knight, T.W.. 1977. B740: Effect of Soil and Urea Fertilization on Foliar Nutrients and Basal Area Growth of Red Spruce. Maine Agricultural and Forest Experiment Station Bulletins .