Author: United States Department Of Agriculture
Publisher: Forgotten Books
ISBN: 9781396157882
Category : Science
Languages : es
Pages : 140
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Excerpt from The Caribbean Forester, Vol. 15: January-April, 1954; Nos. 1 And 2 Research in this problem area has, as elsewhere been concerned with the artificial introduction of superior species into both open areas and secondary forests and also with the improvement of existing forests by partial cuttings. The existence within this problem area of the only extensive well developed virgin and slightly disturbed for ests in the island has provided the sole local opportunity to perform fundamental research on the silvical characteristics and require ments of the component species. Studies of this nature have been caried out as a basis for silviculture in several problem areas. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: Southern Forest Experiment Station
Publisher: Forgotten Books
ISBN: 9780265779743
Category :
Languages : en
Pages : 202
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Excerpt from The Caribbean Forester, Vol. 3: October, 1941 The journal is presented quarterly, in January, April, July, and October. Material for publication should be submitted at least two months before publication date and be addressed to the Director, Tropical Forest Experiment Station, Rio Piedras, Puerto Rico. Articles may be submitted in the contributor's own language and preferably should be accompanied by a short summary of the paper. Authors' names should be typed or printed clearly and the title or position of the author sent with the paper. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: United States Department Of Agriculture
Publisher: Forgotten Books
ISBN: 9780265766804
Category :
Languages : en
Pages : 118
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Excerpt from The Caribbean Forester, Vol. 16: January-June 1955 The humid limestone region, extending al most the length of the north coast of Puerto Rico, is an area of shallow rocky clay soils, mostly hilly and already covered with secon dary forests. The lower, more protected slo pes apparently are potentially a good forest site, but because of their accessibility few trees of good species remain. Reforestation is less a problem than the introduction of supe rior species into existing stands. The studies here reported are located in the Cambalache Experimental Forest at sea level with about 60 inches of rainfall annually, in the Rio Aba jo Forest, at feet elevation with 80 inches of precipitation, and in the Guajataca Forest at 500 feet elevation with 70 inches of rain fall annually.made slow but continuous growth beneath light shade. After 2 years the trees range between 30 and 48 inches in height, and no need for early liberation is apparent. Mexican cypress (cupressus lusitanica Mill), described elsewhere in this report as very promising at high elevation, has general ly appeared much less adapted to low eleva tions. Trees at sea level usually become poorly formed, weaken, and frequently fall over. In 1952 underplanting in the Rio Abajo forest the trees appeared so weak until the past year as to be destined for failure. However, as a result of recent complete liberation from shade the trees now appear to be growing as well as at higher elevations. Now, after 4 years, the trees range between 10 and 15 feet in height and are beginning to dominate the site. This species will apparently not withstand much shade under these conditions and therefore should not be underplanted. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: Tropical Forest Experiment Station
Publisher: Forgotten Books
ISBN: 9780265777121
Category :
Languages : en
Pages : 226
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Excerpt from The Caribbean Forester, Vol. 2: October, 1940 History. - The forests of the Virgin Islands are particularly interesting because of the tremendous past influence of man on the present composition of existing stands. The Virgin Islands were purchased from Denmark by the United States in 1917. Prior to that date, these islands had been the property of Denmark for over two centuries, but had gone through many vicissitudes, all of which had their effect on the forest. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: United States Forest Service
Publisher: Forgotten Books
ISBN: 9781390454673
Category : Science
Languages : en
Pages : 446
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Excerpt from The Caribbean Forester, Vol. 6: October 1944-January 1945 The following descriptions of the soil types was furnished by Dr. B. M. Chehery, Government Soil Chemist. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: United States Forest Service
Publisher: Forgotten Books
ISBN: 9781396095320
Category : Science
Languages : fr
Pages : 732
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Excerpt from The Caribbean Forester, Vol. 7: January 1946 February and March Winds are of highest intensity, thus contributing to drier conditions during this period. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 156
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 820
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Author: American Geographical Society of New York
Publisher:
ISBN:
Category : Geography
Languages : en
Pages : 588
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