Treesearch

Intensive forest management demands high rates of return, and these are affected by such things as growth rate per acre and quality of wood produced. It is necessary therefore to use trees that grow rapidly and produce wood of the best possible quality in the specific characteristics desired. Such trees can be developed through genetic improvement of commercially important species. Provenance studies such as the one eported in this paper are important sources of basic information for tree improvement programs. This study is being conducted on three Southern Appalachian sites using provenanc...

Following tests in the coastal plain and Piedmont of Georgia (Moore et al. 1960), a procedure was developed and used to assess browse resources in 21 counties of north Georgia involving a total land area of approximately 4 million acres (fig. 1). Although the Forest Survey is designed primarily to yield information on timber, it also provides an excellent sampling vehicle for measuring other forest resources. For example, West Virginia, working with the Northeastern Forest Experiment Station, obtained a statewide habitat map which has been of great value in managing wildlife resources...

Tree improvement research at the Lake City (Florida) Research Center of the Southeastern Forest Experiment Station is aimed primarily at improving oleoresin yield of slash pine (Pinus elliottii Engelm. ). The wide range in variation of this trait among individual trees is already being utilized in the improvement of the species. The results of intraspecies hybridization have been reported by Mergen (1954), Mergen et al. (1955), Bourdeau and Schopmeyer (1958, pp. 313-319), Squillace and Dorman (1961), and Squillace and Bengtson (1961).

The trail-marking substance of Atta texana (Buckley) is formed in the true poison gland and deposited by the sting. This attractant is initially produced by teneral workers. The substance obtained from mature, large workers is the most potent.

Although slash pine has the most limited range of the major southern pines, more has been planted than any other southern pine, or for that matter, than any timber species in North America. More acres of planted slash pine are also approaching a merchantable condition than any other species, even though the bulk of the plantings has been in the last 20 years. Because most planting is so recent, there has been a lack of information on the growth and yield of slash pine plantations. Until 1955 the information was piecemeal and only then did the first major contribution on growth and yield...

This report summarizes information on the 1962 production of industrial roundwood (except pulpwood) in Louisiana. Because parish output is included--as well as State totals--this report should be locally useful to foresters, economists, and others concerned with the formation of forestry programs, the evaluation of timber production trends, the appraisal of plant location opportunities, and outlets for marketing timber products. The data were collected by the Louisiana Forestry Commission and compiled by the Southern Forest Experiment Station. Information on pulp- wood production is issued...

Tree planting rates in the South have rocketed over the past three decades, and the area now leads the nation in plantation establishment. During 1960 over a half-million acres were planted in the states of Georgia and Florida alone. Such extensive planting, mainly of pines, has brought in its train a need for more seed and better seed. Each year the demand intensifies for seed from trees of known geographical origin with proven or inheritable desirable traits such as superior growth rates, superior form, disease resistance, or gum-producing capability. This demand in turn has led governmen...

Research has demonstrated that a high correlation exists between the moisture content of fine fuels and the moisture content of the ambient air. The mortarboard psychrometer was developed by the Southern Forest Fire Laboratory to provide a simple, accurate, yet inexpensive means of obtaining wet - and dry-bulb temperature readings to be used in estimating fine fuel moisture. It is one of the results of a series of studies conducted in conjunction with the development of the National Fire Danger Rating System. A number of commercially available psychrometers were tested. All instruments...

Every manager of a recreation site needs three essential statistics: man-hours of use, number of visits, and peak loads. Man-hours of use are a good gauge of site wear and tear and service reaquirements. Visits reflect the number of impressions gained by people and hence provide an index to public approval or dissatisfaction, depending upon site condition. Peak load data are the basis of plans for capacity or overload crowds.

Pulpwood production in the south rose to an all-time high of 25,586,300 cords in 1962-58 percent of the Nation's total. At the year's end, 80 southern pulpmills were operating; their combined daily pulping capacity was more than 52,000 tons. Nine mills outside the region were using wood grown in the South.