Treesearch

The object of the study, the results of which are presented here, was to determine the influence of the forest cover upon climate locally in the Southwest, in so far as this influence might be of importance in the management of timberlands and the possible afforestation of parks and denuded areas. Since the bearing upon forestry rather than upon meteorology is the primary consideration, comparatively little attention is given to purely meteorological problems. The study, moreover, makes no pretense of investigating the influence of the forest upon the general climate of the region. A study...

As early as 1906 the need for a systematic study of cut-over areas on the National Forests was keenly felt. It was impossible to predict to any degree of accuracy the net increment of the trees left after cutting, the height and diameter growth of individual trees, the death rate of some of the older trees nor was it possible to foretell the actual effect on reproduction and on the remaining stand of the different methods of marking, brush disposal, or grazing. Preliminary instructions were drawn up by the writer in co-operation with Mr. G. A. Pearson in 1909. These early instructions have...

Western yellow pine is to the Southwest what white pine is to the Northeast, or longleaf pine to the Southeast. The commercial forests of Arizona and New Mexico are three-fourths western yellow pine, which furnishes by far the greater part of the lumber used locally as well as that shipped to outside markets. To describe the characteristics of the species and to explain the methods of management applied to it on the National Forests of the Southwest, in the hope that they may be applied as well, wherever possible, by private owners, is the chief purpose of this bulletin. It should serve...

The largest pine forest on the North American Continent extends from north-central Arizona in a southeasterly direction into southwestern New Mexico, a distance of approximately 250 miles The forest occupies an extensive plateau, known as the Colorado Plateau, which has a general elevation of from 6,000 to 8,000 feet above sea level, with numerous peaks the highest of which reaches an altitude of about 13,000 feet. Western yellow pine occupies the level mesas and lower slopes of the plateau from approximately 6,500 to 8,500 feet elevation, forming a belt 10 to 30 miles in width.

The object of this circular is to answer so far as present knowledge permits, many questions which are constantly arising concerning the extent of our forest resources, their ownership, the rate at which they are being cut, and the outlook for a future timber supply. The data here given have been drawn from every available source. The bulk of them are based upon statistics collected by the Bureau of the Census, the Forest Service, and the Geological Survey, supplemented by reports of State foresters and conservation commissions, State and national.

The large treeless openings or "parks" in the western yellow pine forests of the southwest, which form a well known characteristic, afford an excellent opportunity for a comparative study of the effect of a forest canopy upon local snow conditions. During the late winter and spring of 1909, the writer had an exceptionally favorable opportunity for observing the progress of snowfall and subsequent melting in a virgin stand of western yellow pine near the base of the San Francisco peaks on the Coconino National Forest in northern Arizona.

On April 12, 1902, President Roosevelt issued a proclamation "for the purpose of consolidating into one reserve the lands heretofore embraced in the San Francisco Mountains Forest Reserves and of including therein the other adjacent lands within the description herein after given." The consolidated area is now known as the San Francisco Mountains Forest Reserve.

To the Senate and House of Representatives: I transmit herewith a report of the Secretary of Agriculture, prepared in collaboration with the Department of the Interior, upon the forests, rivers, and mountains; of the Southern Appalachian region, and upon its agricultural situation as affected by them. The report of the Secretary presents the final results of an investigation authorized by the last Congress. Its conclusions point unmistakably, in the judgment of the Secretary and in my own, to the creation of a national forest reserve in certain parts of the Southern States. The facts...

An American wood. Description of the distribution, growth, habit, wood, and wood properties of the species. Includes bibliographical references.

Over five billion birds move each year across the Americas, flying great distances over almost every location and habitat on the continents (Weidensaul 1999). Over 350 of the over 800 bird species in the United States migrate each year to Latin America and the Caribbean (Degraaf and Rappole 1995). Some fly each way over 4000 miles, chasing the seasons across oceans and continents (Weidensaul 1999). In addition, migratory birds are very important to Americans. Over 75 million Americans participate in bird watching, photography, hunting, nature study, and feeding. These Americans support...