Treesearch

The literature was reviewed for reports on nutrient cycling in the eastern deciduous forest, particularly with respect to nitrogen, and for effects of forest management on the nutrient cycle. Although most such research has dealt with conifers, a considerable body of literature relates to hardwoods. Usually, only those references that dealt quantitatively with nutrient cycling were cited. The nutrient content of the forest stand is a relatively small part of the total nutrient pool contained in soil. Under the present practices of harvesting stem wood on a 50- to 100-year rotation,...

To gain a better understanding of public reaction to I & E displays, average visitor-viewing time was measured for a variety of exhibits at the Adirondack Museum, Blue Mountain Lake, N.Y. Visitors viewed displays 15 to 64 percent of the time required to read or listen to the total message presented. The longer the message per exhibit, the less time was spent observing it. This paper includes a picture of each exhibit, the number of minutes normally required to read each exhibit's entire message, and the average number of minutes visitors actually took to view each display. Study results...

Spraying 16-year-old eastern white pine (Pinus strobus L.) growing in a geographic seed-source test plantation with 10-percent silicone antitranspirant emulsion effectively increased internal water balance during the growing season when compared to control trees of the same seed sources that received no treatment. Extreme silicone toxicity was observed. Apical shoot elongation of treated trees averaged 37 percent of that of controls. Needle elongation of treated trees was also restricted. All of the treated trees were attacked by the white-pine weevil (Pissodes strobi Peck.), and leader...

A field trial was run to test the hypothesis that a band of roots killed by soil fumigation with methyl bromide would be unsuitable for invasion by F. annosus and would block the underground spread of the fungus from diseased trees to healthy trees. Infection centers in red pine plantations from New York to Rhode Island were delineated on the basis of symptoms and fruiting bodies, and were treated. Development of disease was observed in 11 centers for 4 years. Excavation and isolation from roots of trees and stumps adjacent to the fumigation line showed that the fungus had crossed the zone...

Low-temperature forced-air drying involves drying green lumber in heated buildings with forced-air circulation and partial control of temperature and humidity conditions. The lumber is dried to about 20 percent moisture content at dry-bulb temperatures of 70º to 110ºF and with air velocities of 300 to 600 feet per minute. Equipment, methods, and procedures for commercial application of low-temperature drying in the Appalachian hardwood region are described, including dryer design and construction, drying schedules and drying times for commercially important Appalachian species, and...

Results of a 10-year study showed that stumps from 50- to 60-year-old red oak, black cherry, yellow-poplar, white oak, and chestnut oak trees sprouted vigorously. A high percentage of the dominant sprouts had good stem form, and many had excellent height and diameter growth. For all species, we found that the proportion of stumps sprouting, number of sprouts per stump, and dominant-sprout height were not correlated with parent-tree vigor or parent-tree dbh. In red oak, sprouting was not related to season of cutting or site quality.

Several changes in the characteristics of campers' visits were discovered by comparing camping permit data before and after the start of differential campsite pricing at a New Hampshire state park campground in 1973. Differentials included a premium charge for waterfront sites and a preferential rate for New Hampshire residents. Attendance by state residents increased significantly over the average for the preceding 2 years. Total revenue increased by 61 percent. The preferential rates did not produce longer visits or more frequent repeat visits by state residents. Use of waterfront sites...

Sampling of forest tree foliage for nutrient analyses is commonly restricted to specific and often dificult-to-reach locations such as the uppermost sun leaves growing on the south side of the crown. A study of 60-year-old red, white, chestnut, and scarlet oaks growing near Parsons, West Virginia, suggests that the easier-to-reach foliage from the lower crown is equally well suited for nutrient sampling. In this study, 10 individuals of each species were sampled. Foliage samples were taken from the terminal shoot, from each cardinal point in the upper unshaded section of the crown, from...

Three main aspects of uneven-aged management in northern hardwoods are discussed: (1) choice of cutting method, including selection, group selection, and patch selection; (2) control of yields, which involves the establishment of structural goals, the control of marking operations, and the prediction of allowable harvest; and (3) the transportation or removal of products - truck roads, skidroads, and harvesting precautions. Emphasis is on flexibility: the possibilities of applying a range of cutting methods and structural goals to conform to varied objectives and stand conditions.

The yields of interior furniture parts from four manufacturing sequences were compared. In three of the sequences, gang-ripping was the first step; in the fourth, the lumber was crosscut first. Though the grade of lumber used affects the percentage yield of parts, the manufacturing sequence used does not - but it will affect the cost per part. The selection of the best method must be based on factors other than parts yield.