Treesearch

Atlantic white-cedar typically grows in dense stands. In southern New Jersey, young stands commonly contain several thousand trees per acre, and at ages around 60 years there still may be 1,000 or more trees per acre.

The Northeastern Forest Experiment Station, in cooperation with other experiment stations in the United States and Canada, began a range-wide provenance test of eastern white pine (Pinus strobus L.) in 1955. Seed was collected from 31 different locations in 17 states and 4 Canadian provinces. In most places collections were made from 10 trees at each location. The seed from individual trees was kept separate.

In 1948, a dieback of sweetgum (Liquidambar styraciflua L.) was first observed and reported at College Park, Md. Since then, surveys made from Maryland southward have shown that the dieback, now termed sweetgum blight, has increased in both distribution and severity and now occurs throughout much of the species range. No pathogenic organism has been found to be associated with this blight.

In November 1952 a hot surface fire burned through part of a 30-year-old Virginia pine-hardwood stand near Beltsville, Md. Observations were made for the next 2 years to evaluate the effects of this type of fire under these stand conditions. The main direct effects during the 2 years, as reported by Church in 1955, were: 45 percent mortality of trees 1 inch d.b.h. and larger, principally in the smaller size classes; and destruction of any pine seedlings that may have been present. An indirect effect, on the credit side, was the establishment of almost 11,000 pine seedlings per acre on the...

Nematodes are present in all forest soils, but their effects on forest trees are not known. The known destructive nature of these worms on other woody crops suggests that they may also be involved in causing some of the unexplainable losses in vigor and mortality of forest trees.

Virginia pine (Pinus virginiana Mill.) seed used in nurseries and for forest seeding ordinarily is collected from standing or felled trees in autumn. Some questions that concern the seed collector are: How early in the season does Virginia pine seed ripen? How does seed viability change if the cones are left on the felled trees?

This is a report on the timber resources of Maine. It is based on the findings of a forest survey made in 1954-58 by the Northeastern Forest Experiment Station, U.S. Forest Service. The Maine survey was part of a nationwide survey that is being made to evaluate the extent and condition of the Nation's forest resources.

The Pennsylvania Department of Forests and Waters serves the people in managing state forest lands and in helping private owners manage their forest lands. To produce more timber from Pennsylvania forests, the Department applies many different forestry practices. But the more effort it spends in one direction, the less it can spend in others. So the Department must make choices, seeking the directions by which it can gain the greatest possible increase in timber values for the money it spends.

Open-pit or strip mining has become an important method of mining bituminous coal in Pennsylvania. In 1958 some 19.5 million tons of soft coal - 29 percent of the total bituminous production in the State - were produced by this method.

Northern hardwood forests provide the industries of New England with their most valuable woods: yellow birch and sugar maple for veneer, paper birch for turning stock, and other hardwood species for a variety of specialty products. As a result of recent developments in hardwood pulping, these northern hardwood forests now represent a tremendous reservoir of raw material to the pulp and paper industry. To ensure a continued and balanced supply of timber for these wood-using industries, foresters must be well equipped with information on the growth and development of northern hardwoods.