Treesearch

Surface mine reclamation plantings established in Pennsylvania from 1919 to 1934 were evaluated to determine merchantable volume, presence and volume of volunteer species, and soil development since planting. The evaluation showed that planted conifers had a total volume of 744 M bm on the 150 acres of reclaimed surface mines. In addition, there were 356 M bm of volunteer hardwood species on the area. Examination of soil profiles showed development of distinct soil horizons in all the plantations.

Research literature was reviewed for evidence supporting the management of black walnut plantations for combined timber and nut production. The silviculture of the species is discussed in relation to dual cropping. Stimulation and phenology of flowering and fruiting are reviewed.

Total tree height, seasonal shoot elongation, dates of growth initiation and cessation, and mean daily growth rate were measured and analyzed for a population of jack pine full-sib families derived from inter-provenance crosses. Parental provenance had no effect on these variables although this may have been due to small sample size. Progenies differed significantly for all characteristics and little detectable dominance variance. Total tree height and total seasonal growth were more strongly related to mean daily growth rate than to the date of growth cessation, which was a measure of...

A statistical report on the third forest survey of Ohio conducted in 1978 and 1979. Statistical findings are based on data from remeasured and new 10-point variable radius plots. The current status of forest-land area, timber volume, and annual growth and removals is presented. Timber products output by timber industries, based on a 1978 updated canvass of manufacturers is presented.

This annual assessment of regional timber output is based on a canvass of the pulpmills in the Northeast that use roundwood or wood residue as a basic raw material for paper, insulation, and hardboard products. Contained in the report are a discussion and tabular data on roundwood and chips from plant residues produced and received in the 14 Northeastern states in 1979. This includes pulpwood production by state, county, and species group; pulpwood receipts from roundwood by state and species group; pulpwood chip receipts by state and species group; and production of total-tree chips. From...

Cubic-foot volume equations are presented for the 17 species groups used in the forest survey of the 14 northeastern states. The previous cubic- foot volume equations were simple linear in form; the revised cubic-foot volume equations are nonlinear.