Treesearch

That severely depleted bottomland stands can be returned to quality hardwood production is being demonstrated on a representative tract in the Delta Experimental Forest which was given an improvement cutting about 15 years ago.

From June 1954 to July 1955 the Vicksburg Infiltration Project collected and analyzed samples of 91 soil series in 7 southern states. The purpose was to supply the U. S. Army with information needed for specialized research on military trafficability, but the basic data on soil properties should be of interest to soil scientists generally. The 91 series may be considered typical of the soils in the Gulf Coastal Plain and the Lower Mississippi Valley. Samples were taken at 176 sites, and standard methods were used throughout the study for both field and laboratory procedures.

SOUTHERN HARDWOODS, which supply more than half of the nation's hardwood lumber, are a complex and varied mixture of nearly 40 commercial species. On a good share of the 112 million acres of southern hardwood types the hardwoods are mixed with or have replaced southern pines. Faced with this profusion of species, the silviculturist's first problem is to know what species to grow on a given type of land. Superficially, this would appear to require only a knowledge of the market value of different species. But actually it requires a basic knowledge of the comparative growth rate and quality...

This is a revision of Technical Note No. 34, first.issued in 1938 by C. R. Hursh. Reissues in 1939 and 1940 included numerous valuable suggestions for improvements from co-workers in the field of small drainage-area studies. Since the last issue in 1940, additions and deletions in both procedures and forms have been effected. In the present edition these changes have been brought up to date and more recent techniques and methods added; also a new section in. ground water inventories. This outline represents the efforts of the field and office staffs and technicians of the Division of...

This publication was prepared under the sponsorship of the Committeeon Southern Forest Tree Improvement by the Subcommittee on Tree Selection and Breeding. It is the purpose of the Committee: to advise and assist those interested in the improvement of southern forest trees in arranging and conducting research and development programs; to provide a clearing house for information on forest tree improvements; to provide for or assist in coordination in the conduct of a Southwide program of tree improvement research and development; and to foster and encourage the advancement of knowledge of...

Arkansas' economy depends heavily upon the State's forest resource. In value added by manufacture, wood-using industries far outrank all others; they also furnish a livelihood for almost half of all employees engaged in manufacturing.

During the past few years several pulp and paper companies in the Southeast have started to purchase pulpwood by weight rather thanby volume. The trend toward buying by weight is strong and getting stronger. This conversion from volume to weight measurement of pulpwood brings up many questions. For instance, is the weight basis fair to both buyer and seller? What are exact weight equivalents for a cord of wood? So far, the weight basis seems to be working out with reasonable justice to buyer and seller.With regard to equivalents, we do not have exact answers because the matter is complicate...

The genus Torymus is a group in which the vast majority of species are ectoparasitic on dipterous or hymenopterous gall makers. Three species, however, have been recorded from Homoptera, one on the eggs of Cicadidae and two others as gall parasitoids of the genus Pachypsylla which are gall makers of Celtis sp. (hackberry). Torymus pachypsyllac (Ashmead) is recorded, Ashmead (1888), from twig gals of Pachypsylla venusta (Osten Sacken). An additional host record is supplied by Lienk (1951), who reords it from the leaf gall maker. Another species, Torymus scalaris (Huber), is recorded from...

The Southern Appalachian Research Center is one of seven such sub-divisions within the territory of the Southeastern Forest Experiment Station. It is responsible for the U.S. Forest Service research program in the highlands of southwestern Virginia, western North Carolina, eastern Tennessee, and northwestern Georgia.

This study is part II of an investigation pertaining to the peripheral-milling process of planing lumber. Some relationships were determined between cutterhead horsepower and various combinations of specimen, cutterhead, and feed factors. Power demand curves were interpreted through comparison with simultaneously taken one micro-second photos of the forming chips. Secondary consideration was given to the quality of surface obtained. The cutterhead variables, feeds, and speeds employed are in the range of those commonly used in industry, i.e., feed speeds to 500 FPM with cutterheads ranging...