Treesearch

Forest survey Unit No. 6 in north Alabama embraces 10 counties that lie almost exclusively in the watershed of the Tennessee River (fig. 2). The unit, containing 4,595,900 acres, extends entirely across the northern part of the State, with its southern boundary roughly parallel to, and about 50 miles south of, the Tennessee State line. The Tennessee River, which enters the unit in the northeast corner and flows through it for 200 miles before swinging northward to enter Tennessee, is highly important to the economy of this area, as it is under intensive development by the Tennessee Valley...

The unit hydrograph principle was first presented in 1932 by Leroy K. Sherman, M. Am. Soc. C. E. Since then it has been developed into a usable method for surface run-off analysis. The most notable advance was the introduction of the distribution graph and pluviagraph in 1934 by Merrill M. Am. Soc. C. E. Although the method has become quite. generally accepted, the engineers and hymologists who have made special studies in this field have suggested that farther research be conducted to determine, more definitely, the limitations in the application of the unit hydrograph. One of the...

Each year forest nurserymen are faced with the problem of estimating the number of seedlings they can ship from their nurseries. Since errors in the estimates may seriously affect the planting programs, during the past 2 years the Southern Forest Experiment Station has been attempting to improve nursery-inventory procedure. The inventory method that appears most promising consists of making two estimates one of the total number of seed­ lings in the entire nursery, or a natural subdivision of it; and another of the percentage of plantable seedlings. With the data from these two estimates,...

Methods which are satisfactory for determining the base-exchange capacity of mineral soils can not be applied indiscriminately for determining the exchange capacity of fresh or decomposed plant residues.

The portion of Arkansas treated in this report is a former flood plain of Mississippi River, through which the Arkansas, the White, the Mississippi, and other rivers have cut new channels and developed a later flood plain at a lower level. The soils and topography differ accordingly on the two sites. The present flood plains, or bottoms, are generally flat; wheareas the earlier flood plains, or terraces, are slightly undulating, and because they are about 10 to 20 feet higher they are usually better drained than the bottoms. Altogether, this area (Forest Survey Unit Arkansas #1) covers...

Southeast Alabama (Forest survey Unit Alabam No. 3) has long been one of the principal agricultural areas of the deep South. since its forests, however, are almost as extensive as its fields, a recent study has been made of the forest resources and wood-products industries of this area to determine how important the yare and how their usefulness may be increased. the area, which includes 21 counties with an aggregate of 9 million acres in the southeast part of the State, extends from the Florida boundary line northward to about the middle of the State, and from Georgia line westward to the...

An area of about 8 million acres in southwest Alabama, extending from the Gulf of Mexico northward into the western edge of the Black Belt Prairie, includes two Forest survey Unites: Alabama #1 (the southern part of the area, with Covington, Escambia, Baldwin, Mobile, and Washington Counties), and Alabama #2 (the northern part, with Sumter, Coctaw, Marengo, Wilcox, Clark, Monroe, and Conecuh Counties). These two unites, together, constitute a source of supply for Mobile, an important wood-using center. The southern part of the area, where turpentine and rosin are produced, is in the "naval...

The North Arkansas Delta survey unit includes the flood plains of the Mississippi River and its principal tributaries between Helena, Arkansas, and Cape Girardeau, Missouri, with boundaries as shown in figure 1. Although chiefly in Arkansas, it includes portions of Missouri, Tennessee, and Kentucky. A conspicuous topographic feature is Crowley's Ridge, a narrow elevation rising some 200 feet above the general level of the surrounding plain and extending about 180 miles from Helena, Ark., to the vicinity of Advance, Mo. elsewhere the relief is remarkably uniform, seldom varying locally more...

The Ouachita Mountain region of Arkansas is a rugged, timbered area extending fanwise from Little Rock westward to the Oklahoma state line. The Arkansas River form the northern boundary, and the southernmost ridges of the Ouachita Mountains approximate the southern limits of the area (map, fig. 3). It includes all 9 counties and part of 3 others, totaling 4,917,700 acres. All but a very small portion of the Ouachita National Forest within the State of Arkansas is included in this unit. The cities of Little Rock and Fort Smith, both on the Arkansas River, are important industrially, while...

Northwest Florida is the long arm of the State that extends along the Gulf Coast south of Georgia and Alabama and includes the 16 counties west of the Aucilla River (see map, fig. 1). It is a rather sparsely settled area in which only 26 percent of the total population of 254,000 (1930 Census) live in cities of 2,500 population or larger; most of the inhabitants live on farms and in lumber or turpentine camps. Pensacola near the western boundary, with over 30,000 people, and Tallahassee near the eastern edge, with about 11,000 people, are the only cities of more than 10,000 population.