Treesearch

In the lower Piedmont, fully stocked stands of advance reproduction survive and grown underneath a great range of overwood densities of loblolly pine. A relatively small amount of overwood markedly reduces the height growth of understory seedlings as compared with that of free-growing seedlings; but a rather large additional increase in overwood density is required to bring about significant additional reduction in seedling height growth. Thus, under the shelterwood method of regeneration, considerable leeway can be exercised in the amount of overwood left. This study shows that level of...

Loblolly pine is one of the most valuable tree in the South. It grows to large size faster than any of the other ou them pines. Loblolly pine is easy to recognize. The needles are 6 to 9 inches long growing in clu ters of 3 ( occasionally 2) . I ts cones are usually 3 to 5 inche long having short sharp spines. On young trees the bark is nearly black and scaly; on older trees it is 1 to 2 inches thick and divided into irregular dark-brown scaly block . Mature tree are generally 80 to 100 feet high, having a tall, traight trunk with larger specim ns averaging about 2 f et in diameter ( fig....

Southern foresters and forest landowners are often faced with the necessity of estimating the productive capacity of their hardwood sites. The Southern Forest Experiment Station is developing techniques for using soil and topographic characteristics to predict site index (average height of dominants at age 50 years ) for many commercially important southern hardwood species .

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...