Specific gravity and mechanical property-age relationships in red pine
1992
Shepard, R.K. | Shottafer, J.E.
This study examined changes in specific gravity (SG), modulus of rupture (MOR), and modulus of elasticity (MOE) with age for two plantations and a natural stand, using microbending specimens. The mature period for SG and MOR began at an average age of 39 years; for MOE it began at age 40. Average mature wood values were 22 percent greater for SG, 68 percent greater for MOR, and 90 percent greater for MOE. Mean wood property values for both the juvenile and mature periods in the two plantations were generally equal to or greater than those for the natural stand.
显示更多 [+] 显示较少 [-]