Treesearch

Amendment to "A guide to hardwood log grading," a teaching aid and field reference first published in 1963 and revised in 1965. Amends only the section on epicormic or adventitious bud clusters.

A comparison of inventories of six mixed hardwood compartments on the Kaskaskia Experimental Forest - made 12 years apart - shows that the three that received a cull-removal treatment as well as group-selection harvests were moving toward achieving sustained yields of medium to large sawtimber more rapidly than the three that had received only the group-selection harvests. Cull removal created value differences great enough to pay for the treatment two times out of three.

Various herbicides were used to release pine or hardwood seedlings from competition of Japanese honeysuckle, or to eliminate honeysuckle in areas being prepared for regeneration. Considering both the degree of honeysuckle control and the amount of damage to desired trees, we recommend 2,4-D emulsifiable acid with application in late fall for release of hardwoods and in late summer or early fall for release of pines. A mixture of 2,4-D-picolinic acid applied during spring or early summer is recommended as a conditioning treatment to prepare an area for new regeneration.

In aspen trees infected by Fomes igniarius var. populinus, the thin shell of sound wood enclosing the central column of decayed wood offers an ideal place for sapsuckers to peck out nests.

The regeneration of a clearcutting with paper or yellow birch is expressed as an elementary stochastic (probabalistic) model that is computationally similar to an absorbing Markov chain. In the general case, the model contains 29 states beginning with the development of a flower (ament) and terminating with the abortion of a flower or seed, or the development of an acceptable stem, unacceptable stem, dead seedling, or nongerminate (the six absorbing states). Expressions are given for the expected mean number of occurrences of each state, and the probability of arriving at any absorbing...

No significant differences were found between the heights of standing hardwood trees estimated with a Haga altimeter and actual heights measured after the trees had been felled. Differences ranged from +10 feet to -12 feet, and the mean difference for all trees was 0.1 foot.

Plots were established in thinned shortleaf pine plantations in Missouri to determine the rate of spread of Fomes annosus root rot over a 5-year period. On these plots mortality from F. annosus was about 5 trees per acre per year.

Under the authority of the McSweeney-McNary Forest Research Act of May 22, 1928, and subsequent amendments, the Forest Service, U. S. Department of Agriculture, conducts a series of continuing forest surveys of all states to provide up-to-date information about the forest resources of the Nation. A resurvey of the timber resources in Pennsylvania was made in 1963-65 by the Northeastern Forest Experiment Station, approximately 10 years after the initial forest survey. In this resurvey, as in the initial survey, the Northeastern Station again received cooperation from the Pennsylvania...

The McSweeney-McNary Forest Research Act of 1928 authorizes the U. S. Forest Service to complete a statewide forest inventory of Kentucky at approximate 10-year intervals as part of the nationwide program of maintaining a current account of our timber resources. The Division of Forestry of the Kentucky Department of Natural Resources and the U. S. Forest Service planned and conducted a new inventory of Kentucky forests. The field work was completed in 1964. Kentucky appropriated $120,000 for the survey. This contribution, supplementing the Federal funds available for a regular survey, made...

This study was funded through the Appalachian Regional Development Act of 1965 and was conducted by the Forest Survey Project of the Northeastern Forest Experiment Station with the assistance of the State Forester and the Extension Forester of West Virginia, and the Monongahela Power Company. The State Forester's office and the Extension Forester provided lists of wood-using industries in the State, and the Monongahela Power Company assisted in the field follow-up of nonrespondents to the mail canvass.