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Plots in seven eastern white pine sawlog stands were treated with nitrogen at rates of 0, 56, 112, and 224 kg/ha. After four years the largest increase in basal area growth, 0.31 dm2 /tree, and volume growth, 13.0 m3 /ha, occurred in plots that received 112 kg/ha. It appears that an application rate of 112 kg/ha may provide a real return of 15% or more in some stands.
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Maine Agricultural Experiment Station
eastern white pine
Shepard, R.V., and T.B. Brann. 1987. Fertilization of eastern white pine (Pinus strobus L.) in Maine shows economic potential. Maine Agricultural Experiment Station Technical Bulletin 125.