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Full-Text Articles in Life Sciences
Tb127: Age And Thinning Effects On Wood Properties Of Red Spruce (Picea Rubens Sarg.), Michael P. Wolcott, Robert K. Shepard, James E. Shottafer
Tb127: Age And Thinning Effects On Wood Properties Of Red Spruce (Picea Rubens Sarg.), Michael P. Wolcott, Robert K. Shepard, James E. Shottafer
Technical Bulletins
Ten overstory red spruce were selected from a thinned stand and 1 0 from an unthinned stand. Average age of sample trees was approximately 80 years. Specific gravity reached a maximum at age 53 in the thinned stand and age 72 in the unthinned stand, after which it remained relatively constant. Stiffness reached a maximum at ages 35 and 50, and bending strength at ages 41 and 54; both remained relatively constant with further increases in age. Stiffness showed the largest relative difference between juvenile and mature wood, 22%, and specific gravity the smallest difference, 8%. Thinning did not adversely …
Tb125: Fertilization Of Eastern White Pine (Pinus Strobus L.) In Maine Shows Economic Potential, Robert K. Shepard, Thomas B. Brann
Tb125: Fertilization Of Eastern White Pine (Pinus Strobus L.) In Maine Shows Economic Potential, Robert K. Shepard, Thomas B. Brann
Technical Bulletins
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.