Forest Sciences Commons^™

Biotic Communities Of The Aspen Parkland Of Central Canada, Ralph D. Bird

Aspen Bibliography

No abstract provided.

Control Of The White Pine Weevil On The Eli Whitney Forest, William Maughan

Yale School of the Environment Bulletin Series

During the summer of 1930 the author made an investigation to determine the actual results of the control work. The results show that the weevil can be controlled on certain sites. The removal of infested tips brings about a marked reduction in the amount of infestation evident during succeeding years. The reduction first becomes noticeable the second or third year after the work is started. In the stands in which treatment has been completed more than enough acceptable stems have been secured on the medium and better sites. On the poorer sites enough acceptable stems are not secured even though …

Forest Possibilities Of Aspen Lands In The Lake States, Joseph Kittredge, Jr, Suren Rubenian Gevorkiantz

Aspen Bibliography

No abstract provided.

Quaking Aspen: A Study In Applied Forest Pathology, E.P. Meinecke

Aspen Bibliography

In the management of quaking aspen (Populus tremuloides Michaux.), as well as of any other species of forest tree, two factors are of decisive influence, namely, the possibility of securing the maximum volume production in sustained yield on a given area and on the other hand that of reducing to a minimum the loss from decay and other injurious factors.

Colloidal Content And Related Soil Factors As Indicators Of Site Quality, Irvine T. Haig

Yale School of the Environment Bulletin Series

This paper presents a study of the correlation between soil colloidal content and soil productiveness and hence a measure of the value of colloidal content in determining site quality. The character of this investigation also permitted incidental observation and comment on the relative value of organic matter, soil acidity, and soil type and class as similar measures. The findings are directly applicable to the forest soils of southern Connecticut and, more particularly, to such of these soils as occur commonly in the vicinity of New Haven. Since these soils are typical of the brown, weakly podsolized forest soils of southern …

Some Aspects Of Soil Moisture In The Forest, Ian J. Craib

Yale School of the Environment Bulletin Series

By determining the moisture content of carefully selected soil samples taken at various depths down to three feet, the moisture content of soils in the forest and in the open have been compared. The soils investigated were similar in their mechanical properties. Part I is an investigation of the effect of forest cover on the amount of water in the soil over the growing season and its availability. Part II is an investigation of the effect of root competition on the available water supply of forest soils.

Some Aspects Of Light In The Forest, Amihud Grasovsky

Yale School of the Environment Bulletin Series

In this present investigation an attempt is made to determine experimentally to what extent light controls the vegetation on the forest floor and, consequently, succession of the forest flora, and whether under natural canopies light can be looked upon as a limiting factor in plant survival.

The general conclusion reached is that the intensity and quality of the light reaching the forest floor are not the determining factors in accounting for the presence or absence of reproduction in the fully stocked forest where the investigation was made.

Trends And Silvicultural Significance Of Upland Forest Successions In Southern New England, Harold J. Lutz

Yale School of the Environment Bulletin Series

The problems encountered in the silvicultural treatment of southern New England forests are many. They result largely from the extremely diverse and complex conditions under which the forest is developed. Due to the glaciated nature of the region the soil character changes radically within relatively short distances. With changes in soil from place to place come minor changes of forest composition. One of the chief reasons for the problems which the silviculturalist encounters in this region is the large number of species which make up the stands. There are approximately thirty commercially important forest trees in southern New England. The …

The Pine Tipmoth In The Nebraska National Forest, M. H. Swenk

Nebraska Agricultural Experiment Station: Historical Research Bulletins

On May 8, 1911, Mr. Smith Riley, the District Forester, with headquarters at Denver, in a letter to Acting Supervisor Pierce at Halsey, requested that the Nebraska Agricultural Experiment Station take up energetically the investigation of the pine tipmoth in the Nebraska National Forest. This request being presented to the Department by Mr. Pierce later in the month resulted in the presentation of the problem to the Experiment Station Council as a proposed Station project. The project was approved on May 31, 1911, and the expenses of the investigations of 1911 and 1912 that are reported upon in this bulletin …

Heartrot Of Aspen : With Special Reference To Forest Management In Minnesota, Henry Schmitz, Lyle W.R. Jackson

Aspen Bibliography

No abstract provided.

The Testing Of Coniferous Tree Seeds At The School Of Forestry, Yale University, 1906-1926, James W. Toumey, Clark L. Stevens

Yale School of the Environment Bulletin Series

Quality in forest tree seed centers in (a) origin; (b) genuineness; (c) purity; and (d) viability. The purchaser should insist on knowing the origin of the seed and the locality where it was collected.

Without seed testing establishments for investigating forest tree seeds by standardized methods under an established technique, nurserymen and foresters will continue to sow seed beds and undertake direct seeding without an adequate knowledge of the origin, genuineness, purity, and viability of the seeds used.

Factors Controlling Germination And Early Survival In Oaks, Clarence F. Korstian

Yale School of the Environment Bulletin Series

There is little information available upon the seed and seedling characteristics of the American oaks. Among the fundamental problems in American silviculture, those which relate to seed efficiency are especially important. The future productiveness of the hardwood forests in which chestnut has been an important·element rests largely upon seed and sprout efficiency. Seed efficiency is governed by (I) seed production, (2) seed distribution, and (3) the factors affecting the reproductive value of the seed, such as viability, storage of seed in the litter of the forest floor, and destruction by insects and rodents.

A Second Progress Report Of The Results Secured In Treating Pure White Pine Stands On Experimental Plots At Keene, New Hampshire, Ralph C. Hawley

Yale School of the Environment Bulletin Series

In October, 1905, nineteen permanent sample plots were established in the white pine type near Keene, New Hampshire, by the United States Forest Service in cooperation with the Faulkner and Colony Manufacturing Company on lands owned by the latter.! The plots were remeasured in 1909 and again in 1915 by representatives of the United States Forest Service. After the 1915 measurement the plots were turned over to the Yale School of Forestry. In 1920 the plots were remeasured for the third time, three additional plots were established and six of the original plots were discontinued. A fourth remeasurement was made …

Grazing Periods And Forage Production On The National Forests, Arthur W. Sampson, Harry E. Malmsten

Aspen Bibliography

Stockmen in the West have always had confidence in the adequacy of the native forage crop to provide pasturage for their livestock. Indeed, under normal climatic conditions this enormous natural resource has not failed the grazier, except where it has been called upon to meet unreasonable demands. The productivity of the range has declined sharply, however, wherever the requirements of plant growth have been disregarded for many years in succession. Where there has been too early or too frequent and to heavy grazing, undue trampling, or some other unsatisfactory feature of range use, the results have been uniformly bad. Many …

Soil Temperature As Influenced By Forest Cover, Tsi-Tung Li

Yale School of the Environment Bulletin Series

The purpose of this investigation is to study the effect of the forest on soil temperature at definite depths, expressed in terms of daily maximum and daily minimum. By forest is meant not only the trees but the surface vegetation and litter as well. Effort was made to preserve the vegetation and litter from being disturbed over the period covered by the investigation.

Distribution And Structure Of The Forests Of Eastern Nebraska, John M. Aikman

University Studies (University of Nebraska) (1888–1984)

This paper is a study of the distribution and structure of the forests of extreme eastern Nebraska. The Missouri river, which forms the eastern boundary of the state, has so greatly modified the climate, that along its course an arm of the deciduous forest extends far into the grassland. Most of the trees and shrubs composing this forest are at the extreme western limit of their range. The range, grouping, and behavior of the several dominants and subdominants, under the environmental conditions imposed upon them, and the transition of forest to grassland are the subjects of this investigation. This region …

Studies Of Connecticut Hardwoods: The Form Of Hardwoods And Volume Tables On A Form Quotient Basis, Ralph C. Hawley, Rogers G. Wheaton

Yale School of the Environment Bulletin Series

SATISFACTORY volume tables for Connecticut Hardwoods have been . lacking. Considering the fact that the forestry movement within the state started a quarter of a century ago, this condition may seem strange. The scarcity of large bodies of timber, the diverse mixture of species in the average stand requiring several volume tables, and the fact that timber estimating as a business is of relatively lower importance here than in the more heavily timbered regions, account for the failure to develop volume tables. Foresters working within the region have been content to estimate timber by log unit methods or to adapt …

Factors Determining Natural Reproduction Of Longleaf Pine On Cut-Over Lands In Lasalle Parish, Louisiana, Herman H. Chapman

Yale School of the Environment Bulletin Series

The original ' pine forests, of the southern states covered from 125 to 130 million acres of land, about two-thirds of which was Longleaf pine. Four-fifths of this area had been cut over by 1920, leaving about 230 million acres, one-half of which is Longleaf pine. Of the cut-over lands, 31 million acres have not restocked. The Longleaf pine has thus been the principal tree crop on about 85 million acres of land, of which 11% million acres remained' in 1920, giving a cut-over area of nearly 73 million acres, or 114,062 square miles. This area is nearly half the …

Boxwoods, Samuel J. Record, George A. Garratt

Yale School of the Environment Bulletin Series

True boxwood, commonly called Turkish boxwood, is derived from a small group of plants, of which the common evergreen ·box of our gardens is the type. To this group the famous botanist Linnaeus gave the generic name of Buxis, the Latin for box tree. He called the best known member of it Buxis sempervirens, which is' but another form of Ovid's "buxus perpetuo virens," the evergreen box. For long this was considered the only species, though various forms and varieties came to be recognized, several of which have since been elevated by other botanists to specific rank.

The Transportation Of Logs On Sleds, Alexander Michael Koroleff, Ralph C. Bryant

Yale School of the Environment Bulletin Series

Heavy sleds, designed to transport timber from the forest to water courses down which it is floated or to haul it to mill or market, have been perfected chiefly in the United States and Canada. The importance of this method is indicated by the fact that it is used in transporting approximately 90 per cent of the annual log input of New England and New York, 80 per cent of that of the Lake States, and 100 per cent of that of Alaska and of Canada, exclusive of British Columbia.

The credit for the development of sled-hauling methods in the …

Aspen In The Central Rocky Mountain Region, Frederick S. Baker

Aspen Bibliography

The detailed studies reported in this bulletin were carried out chiefly on the Ephraim Canyon watershed of the Manti National Forest in central Utah.

Studies Of Connecticut Hardwoods: The Treatment Of Advance Growth Arising As A Result Of Thinnings And Shelterwood Cuttings, Louis J. Leffelman, Ralph C. Hawley

Yale School of the Environment Bulletin Series

The typical hardwood stand with which the silviculturist in Connecticut has to deal is even-aged in form. The causes which operated in the past to create stands of this character are thoroughly understood and do not require consideration in this study. That even-aged stands, particularly when densely stocked and composed of comparatively intolerant species, require thinning to develop the most vigorous individuals and to obtain maximum production, is an accepted principle of silviculture.

The study separates logically into five parts:

1. A system of classification for the woody vegetation.

2. Amount, character, and distribution of the advance growth and of …

Nursery Investigations With Special Reference To Damping-Off, J W. Toumey, T T. Li

Yale School of the Environment Bulletin Series

The object of this investigation is therefore fourfold: 1. To determine an effective means of control of damping-off in the School of Forestry Nursery. 2. To determine the effects of different soil sanitation agents on the germination and later growth of coniferous stock. 3. To determine the effects of different sanitation agents on the germination and growth of weeds. 4. To determine the effects of different sanitation agents on the physical characteristics of the soil.

Hemlock: Its Place In The Silviculture Of The Southern New England Forest, Perry H. Merrill, Ralph C. Hawley

Yale School of the Environment Bulletin Series

Eastern hemlock (Tsuga Canadensis) has been considered in the past of negligible value as a timber tree in comparison with its associates. This idea persists in spite of the fact that either virgin or second growth hemlock of merchantable size is readily salable for a variety of products.

Some Effects Of Cover Over Coniferous Seedbeds In Southern New England, James W. Toumey, Ernest J. Neethling

Yale School of the Environment Bulletin Series

The object of the study as at first conceived was to secure experimental data under the climatic conditions of southern Connecticut: 1. On the effect of shade as compared with full light on the time required for germination, and on germination values in representative conifers, and on survival and growth during the first season. 2. On the effect of mulch as compared with exposed soil on the time required for germination, and on germination values in representative conifers, and on survival and growth during the first season.

Cocobolo, Samuel J. Record, George A. Garratt

Yale School of the Environment Bulletin Series

Cocobolo is a valuable timber of commerce that has been in use in this country, particularly for handles of cutlery, for more than fifty years. It is produced by certain species of Dalbergia indigenous to Central America and southwestern Mexico. The present commercial sources are Panama, Costa Rica, and Nicaragua.

A Progress Report Of The Results Secured In Treating Pure White Pine Stands On Experimental Plots At Keene, New Hampshire., Ralph C. Hawley

Yale School of the Environment Bulletin Series

In October, 1905, nineteen permanent sample plots were established in the white pine type near Keene, New Hampshire, by the United States Forest Service in cooperation with the Faulkner and Colony Manufacturing Company on lands owned by the latter. The plots were remeasured in 1909 and again in 1915 by representatives of the United States Forest Service. After the 1915 measurement the plots were turned over to the Yale School of Forestry. In September, 1920, the plots were remeasured for the third time, three additional plots were established and six of the original plots were discontinued. Fifteen years have elapsed …

Lignum-Vitae: A Study Of The Woods Of The Zygophyllaceae With Reference To The True Lignum-Vitae Of Commerce--Its Sources, Properties, Uses, And Substitutes, Samuel J. Record

Yale School of the Environment Bulletin Series

The true lignum-vitae of commerce belongs to the family Zygophyllaceae, of which only three genera, namely, Guaiacum, Porlieria, and Bulnesia, have representatives of tree size, and these are confined to the tropical and sub-tropical regions of the Western Hemisphere. Porlieria is of no commerical importance.

The Den: A Preliminary Report, With Map, Of A Tract Of Woodland Given To The School By Mr. And Mrs. Winthrop Perry., James W. Toumey, Ralph C. Hawley

Yale School of the Environment Bulletin Series

In the autumn of 1918, through gift of Mr. and Mrs. Winthrop Perry, the School of Forestry came into possession of a number of closely connected parcels or woodland comprising over 1,300 acres in Farifield County Connecticut.

The purpose of the donors and conditions under which the gift was made are clearly stated....

Notes On Some Diseases Of Aspen, Carl Hartley, Glenn G. Hahn

Aspen Bibliography

No abstract provided.