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Articles 1621 - 1629 of 1629
Full-Text Articles in Forest Sciences
Some Effects Of Cover Over Coniferous Seedbeds In Southern New England, James W. Toumey, Ernest J. Neethling
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
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.
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
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
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....
The Keene Forest: A Preliminary Report, J. W. Toumey, Ralph C. Hawley
The Keene Forest: A Preliminary Report, J. W. Toumey, Ralph C. Hawley
Yale School of the Environment Bulletin Series
In 1913 the Yale School of Forestry came into possession of certain parcels of land located near Keene, New Hampshire. This land amounting to 629.4 acres was presented to the School as a nucleus for a school forest to be used for purposes of instruction and research. Subsequently in March, 1915, additional lots comprising 270.9 acres were purchased with funds contributed by the original donor. The present area totals 900.3 acres and is know as the "Keene Forest."
Ecological Investigations Upon The Germination And Early Growth Of Forest Trees, Richard H. Boerker
Ecological Investigations Upon The Germination And Early Growth Of Forest Trees, Richard H. Boerker
University Studies (University of Nebraska): Papers
Briefly stated the purpose of the present investigation is to inquire into the effect of the more important habitat and seed factors upon the germination and early development of certain American forest trees in control cultures in the greenhouse for the purpose of obtaining data that may be used in the ~ilvicultural management of these species.
Prefatory Note 1 / Preliminary Considerations 7 / Historical 7 / Classification and Resume of Habitat Factors 11 / The Germination Process 15 / Method of Attacking Problem at Hand 19/ Methods and Apparatus Used 2 1/ The Control of Habitat Factors 24 / …
Practical Information On The Scolytid Beetles On North American Forests I. Barkbeetles Of The Genus Dendroctonus, Andrew Delmar Hopkins
Practical Information On The Scolytid Beetles On North American Forests I. Barkbeetles Of The Genus Dendroctonus, Andrew Delmar Hopkins
The Bark Beetles, Fuels, and Fire Bibliography
During the writer's investigations of extensive insect depredations in the forests of West Virginia, from 1890 to 1902, he was forcibly impressed with the importance of the forest-insect problem in connection with any future efforts toward the successful management of the forests of this country, and was thus led to give special attention to the subject. It was soon realized that among the principal groups of insect enemies of forest trees the scolytid bark and wood boring beetles must occupy first rank, both in economic importance and systematic interest. Subsequent investigations in West Virginia, in connection with the work of …
Plant Migration Studies: Forest Trees, Charles E. Bessey
Plant Migration Studies: Forest Trees, Charles E. Bessey
University Studies (University of Nebraska): Papers
It is a familiar fact that new species appear from time to time among the native plants of a region. Such newcomers turn out on examination to be new only in the sense that they have not previously lived in the region, and in every instance these new plants are found to have come from other regions where they had existed for a longer or shorter period of time. In some cases the · new species remain for a time and then disappear, or at least become inconspicuous, but more commonly they crowd in among the former plants and become …
The Distribution Of The Native Forest Trees Of Nebraska, Charles E. Bessey, Robert Bolin , Depositor
The Distribution Of The Native Forest Trees Of Nebraska, Charles E. Bessey, Robert Bolin , Depositor
School of Biological Sciences: Faculty Publications
This document lists 67 trees identified by Dr Bessey with the help of others around the state. It includes the common and scientific names as well brief comment about each tree. Small maps are provided showing the distribution of each tree.