| УДК |
Аннотация: В сборнике рассматриваются статьи: выращивание деловой осины для спичечного производства; главнейшие вредители и болезни осины и меры борьбы с ними.
Экземпляры всего: 2
ИЛ-Фонд (2)
Свободны: ИЛ-Фонд (2)
Сводный каталог книг
w10=
Найдено документов в текущей БД: 41
06л
Ц 11
Ц 11
Выращивание деловой осины
[Текст] = Studies in silviculture of aspen timber : сборник трудов. Сб. 16 / Отв. ред. И.Я. Гурвич ; ЦНИИЛХ. - Л. : Гослестехиздат, 1940. - 82 с. : ил. - 500 экз. - 3.60 р.
Аннотация: В сборнике рассматриваются статьи: выращивание деловой осины для спичечного производства; главнейшие вредители и болезни осины и меры борьбы с ними.
Экземпляры всего: 2
ИЛ-Фонд (2)
Свободны: ИЛ-Фонд (2)
Аннотация: В сборнике рассматриваются статьи: выращивание деловой осины для спичечного производства; главнейшие вредители и болезни осины и меры борьбы с ними.
Экземпляры всего: 2
ИЛ-Фонд (2)
Свободны: ИЛ-Фонд (2)
634.9
A 60
A 60
Annual Report 1995
[Текст] : статистический материал / IUFRO. - [Б. м.] : Slovakia, 1996. - 36 с. - бесплатно р.
Библиогр: В надзаг.:
Кл.слова (ненормированные):
IUFRO, report,forest products, inventory, physiology, genetics and protection, forest environment and silviculture
Экземпляры всего: 1
ИЛ-ИФ (1)
Свободны: ИЛ-ИФ (1)
Библиогр: В надзаг.:
| УДК |
Кл.слова (ненормированные):
IUFRO, report,forest products, inventory, physiology, genetics and protection, forest environment and silviculture
Экземпляры всего: 1
ИЛ-ИФ (1)
Свободны: ИЛ-ИФ (1)
634.9
B 17
B 17
Theory and practice of silviculture
[Текст] : монография / F.S. Baker. - New York ; London : McGraw-Hill Book Company,Inc., 1934. - 502 с. : ill. - (American Forestry Series). - Библиогр: p.465-487%Index: p.489-502. - 75.00 р.
Кл.слова (ненормированные):
silviculture%theory and practice%plant physiology%forest ecology%systematizes silvicultural experience%USA
Экземпляры всего: 1
ИЛ-Иф (1)
Свободны: ИЛ-Иф (1)
| УДК |
Кл.слова (ненормированные):
silviculture%theory and practice%plant physiology%forest ecology%systematizes silvicultural experience%USA
Экземпляры всего: 1
ИЛ-Иф (1)
Свободны: ИЛ-Иф (1)
634.9
C 21
C 21
Caring for the forest: research in a changing world
[Текст] : poster abstracts; IUFRO XX World Congress 6-12 Augus 1995 Tampere, Finland / Edited by E.Korpilahti, T. Salonen, S. Oja. - Tampere : IUFRO, 1995. - 205 с. - бесплатно р.
Библиогр: %Index to Authors: p. 199-205%ISBN 951-40-1452-9
Кл.слова (ненормированные):
Silviculture, forest environmentб forest products, physiology, genetics, protection, Finland
Экземпляры всего: 1
ИЛ-ИФ (1)
Свободны: ИЛ-ИФ (1)
Библиогр: %Index to Authors: p. 199-205%ISBN 951-40-1452-9
| УДК |
Кл.слова (ненормированные):
Silviculture, forest environmentб forest products, physiology, genetics, protection, Finland
Экземпляры всего: 1
ИЛ-ИФ (1)
Свободны: ИЛ-ИФ (1)
634.9
C 51
C 51
American silvics and silviculture
[Текст] : монография / E.G. Cheyney. - Minneapolis : The University of Minnesota Press, 1942. - 472 с. : ill. - 20.25 р.
Библиогр: p. 454-466%Index: p. 467-472
Аннотация: Silviculture as an art has been developed in Europe through centuries of experience with European species of trees. Out of that expeience has come a series of silvicultural patterns that can be very useful in America when we have learned to adapt and apply them to our own species. It is a textbook for students.
Экземпляры всего: 1
ИЛ-ИФ (1)
Свободны: ИЛ-ИФ (1)
Библиогр: p. 454-466%Index: p. 467-472
| УДК |
Аннотация: Silviculture as an art has been developed in Europe through centuries of experience with European species of trees. Out of that expeience has come a series of silvicultural patterns that can be very useful in America when we have learned to adapt and apply them to our own species. It is a textbook for students.
Экземпляры всего: 1
ИЛ-ИФ (1)
Свободны: ИЛ-ИФ (1)
634.9
E 18
E 18
Ecology and management of Larix Forests: a look ahead
[Текст] : proceedings of an international Symposium Whitefish, Montana, USA October 5-9, 1992 / Compillers: W.C.Schmidt, K.J.McDonald ; USDA Forest Service, Intern. Res. Station. - Ogden : Intermountain Research Station, 1995. - 521 с. : ill. + tables,figures. - (General Technical Report GTR-INT : proceedings of an International Symposium / USDA Forest Service ; 319). - Библиогр: at the end of the parts. - бесплатно р.
Кл.слова (ненормированные):
larch, western larch, Larix occidentalis, ecology, international larch management
Аннотация: This proceedings is the product of an international symposium on the Larix species of North America, Europe, and Asia. Western larch, an important species in the Western United States and Canada, was featured. The symposium included information on ecology, management, silviculture, regeneration processes, growth, wildlife, vegetation succession, silvics, history, genetics, breeding and provenance testing, physiology, fire, insects and desease, and research needs. This proceedings illustrates the importance of Larix in the temperate forests of the Northern Hemisphere
Экземпляры всего: 1
ИЛ-ИФ (1)
Свободны: ИЛ-ИФ (1)
| УДК |
Кл.слова (ненормированные):
larch, western larch, Larix occidentalis, ecology, international larch management
Аннотация: This proceedings is the product of an international symposium on the Larix species of North America, Europe, and Asia. Western larch, an important species in the Western United States and Canada, was featured. The symposium included information on ecology, management, silviculture, regeneration processes, growth, wildlife, vegetation succession, silvics, history, genetics, breeding and provenance testing, physiology, fire, insects and desease, and research needs. This proceedings illustrates the importance of Larix in the temperate forests of the Northern Hemisphere
Экземпляры всего: 1
ИЛ-ИФ (1)
Свободны: ИЛ-ИФ (1)
634.9
E 93
E 93
Silviculture of broadleaved woodland
[Текст] : сборник научных трудов / J. Evans. - London : Her Majesty's Stationary Office, 1984. - 232 с. : ill. + figures. - (Forestry Commission Bulletin ; 62). - бесплатно р.
Библиогр: p.213-218, Tree species index: p. 227-232, ISBN 0-11- 710154-0
Аннотация: The object of this book is to assist all who are concerned with the management or cultivation of broadleaves. Much practical silvicultural advice is included and many recommendations are made with the main emphasis on the silvicultural techniquers used to grow good quality timber. But broadleaved woodlands are important for much more than timber production and silvicultural requirements to serve other objectives such as landscape, consewrvation and sporting, are also covered.
Экземпляры всего: 1
ИЛ-ИФ (1)
Свободны: ИЛ-ИФ (1)
Библиогр: p.213-218, Tree species index: p. 227-232, ISBN 0-11- 710154-0
| УДК |
Аннотация: The object of this book is to assist all who are concerned with the management or cultivation of broadleaves. Much practical silvicultural advice is included and many recommendations are made with the main emphasis on the silvicultural techniquers used to grow good quality timber. But broadleaved woodlands are important for much more than timber production and silvicultural requirements to serve other objectives such as landscape, consewrvation and sporting, are also covered.
Экземпляры всего: 1
ИЛ-ИФ (1)
Свободны: ИЛ-ИФ (1)
634.9
H 40
H 40
The practice of silviculture
[Текст] : with particular reference to its application in the United States of America / R.C. Hawley. - Second edition rewritten and reset / Hawley. - New York ; London : John Wiley & Sons, Inc.; Chapman & Hall, 1929. - 335 с. + figures. - eng. - Библиогр. в конце глав. - 60.00 р.
Аннотация: The effort has been made to bring the text up to date and incorporate the information concerning American Silviculture, developed since the book first appeared, without appreciably enlarging the volume. Protection against fire, however, has been treated in greater detail. This is well justified both by the importance, in the application of silviculture, of fire control and by the noteworthy advance made in this field within the last decade.
Экземпляры всего: 1
ИЛ-ИФ (1)
Свободны: ИЛ-ИФ (1)
| УДК |
Аннотация: The effort has been made to bring the text up to date and incorporate the information concerning American Silviculture, developed since the book first appeared, without appreciably enlarging the volume. Protection against fire, however, has been treated in greater detail. This is well justified both by the importance, in the application of silviculture, of fire control and by the noteworthy advance made in this field within the last decade.
Экземпляры всего: 1
ИЛ-ИФ (1)
Свободны: ИЛ-ИФ (1)
634.9
H 40
H 40
The practice of silviculture
[Текст] : монография / R.C. Hawley. - Fifth ed. / Hawley R.C. - New York ; London : John Wiley and Sons,Inc.; Chapman & Hal,Limited, 1946. - 354 с. + figures. - 22.00 р.
Библиогр: at the end of the chapters%Index: p. 345-354
Аннотация: The book deals with the principles and methods of technical procedures but also the details of silvicultural practice for all important tree species.
Экземпляры всего: 1
ИЛ-ИФ (1)
Свободны: ИЛ-ИФ (1)
Библиогр: at the end of the chapters%Index: p. 345-354
| УДК |
Аннотация: The book deals with the principles and methods of technical procedures but also the details of silvicultural practice for all important tree species.
Экземпляры всего: 1
ИЛ-ИФ (1)
Свободны: ИЛ-ИФ (1)
634.9
G 75
G 75
Principles of handling woodlands
[Текст] : монография / H.S. Graves. - New York : John Wiley & Sons, Inc., Б. г. - 325 с. : ill. - eng. - 30.00 р.
Аннотация: The book deals primarily with the principles of cutting mature stands of timber with a view to their replacement by new growth; cuttings in immature stands made for their improvement; and forest protection, with particular reference to forest fires. The book is not intended as a complete treatise on silviculture, but deals only with the treatment of wooalands. The methods of artificial seeding and planting are not included at all.
Экземпляры всего: 1
ИЛ-ИФ (1)
Свободны: ИЛ-ИФ (1)
| УДК |
Аннотация: The book deals primarily with the principles of cutting mature stands of timber with a view to their replacement by new growth; cuttings in immature stands made for their improvement; and forest protection, with particular reference to forest fires. The book is not intended as a complete treatise on silviculture, but deals only with the treatment of wooalands. The methods of artificial seeding and planting are not included at all.
Экземпляры всего: 1
ИЛ-ИФ (1)
Свободны: ИЛ-ИФ (1)
634.9
H 40
H 40
Forestry in New England
[Текст] : a handbook of eastern forest management / R.C. Hawley, A.F. Hawes. - New York ; London : John Wiley & Sons; Chapman & Hall, 1912. - 479 с. : ill + figures. - Библиогр: p. 420-425%Tables: p.426-474%Index: p. 475-479. - 40.00 р.
Кл.слова (ненормированные):
Silviculture -- forest planting and seeding -- injuries -- forest insects and fungi -- fires
Аннотация: The book is arranged in two parts: one dealing with methods and principles of forestry in general, the second treating in detail with the forests of New England. While it is written with special reference to New England, the book has a much wider field of direct application.
Доп.точки доступа:
Hawes, A.F.
Экземпляры всего: 1
ИЛ-Иф (1)
Свободны: ИЛ-Иф (1)
| УДК |
Кл.слова (ненормированные):
Silviculture -- forest planting and seeding -- injuries -- forest insects and fungi -- fires
Аннотация: The book is arranged in two parts: one dealing with methods and principles of forestry in general, the second treating in detail with the forests of New England. While it is written with special reference to New England, the book has a much wider field of direct application.
Доп.точки доступа:
Hawes, A.F.
Экземпляры всего: 1
ИЛ-Иф (1)
Свободны: ИЛ-Иф (1)
634.9
L 44
L 44
Interaction theory in forest ecology and management
[Текст] : монография / R.A. Leary. - Dordrecht ; Boston ; Lancaster : Kluwer Academic Publishers Group, 1985. - 219 с. + figures. - (Forestry sciences ; 19). - eng. - Библиогр.: с. 197-213. - ISBN 90-247-3220-4 : 43.10 р.
Аннотация: This book addresses a crucial concern of forest management: how to manage forests for economic efficiency, ecosystem integrity, and for the biocentrist's concerns for species exclusion and extinction. The author gives an interdisciplinary synthesis of constructs from silviculture, forest economics, and multiple use forest management with ideas from philosophy (ontology, and philosophy of science), mathematics (group algebra, Haskell's coordinate system), structuralism (Piaget's relational structuralism), population and community ecology, and conservation
Экземпляры всего: 1
ИЛ-ИФ (1)
Свободны: ИЛ-ИФ (1)
| УДК |
Аннотация: This book addresses a crucial concern of forest management: how to manage forests for economic efficiency, ecosystem integrity, and for the biocentrist's concerns for species exclusion and extinction. The author gives an interdisciplinary synthesis of constructs from silviculture, forest economics, and multiple use forest management with ideas from philosophy (ontology, and philosophy of science), mathematics (group algebra, Haskell's coordinate system), structuralism (Piaget's relational structuralism), population and community ecology, and conservation
Экземпляры всего: 1
ИЛ-ИФ (1)
Свободны: ИЛ-ИФ (1)
634.9
M 29
M 29
Prescribing silvicultural treatments in Hardwood stands of the Alleghenies (revised)
[Текст] / D.A. Marquis, R.L. Ernst, S.L. Stout ; USDA, Forest Service. - Radnor : USDA, Forest Service, Northeastern Forest Experiment Station, 1992. - 101 с. : рис., табл. - (General Technical Report NE / USDA, For.Ser., Northeastern Forest Exp. St. ; 96). - eng. - Библиогр.: с. 17-26. - Б. ц.
Аннотация: This publication brings together the results of 20 years of research and experience in the silviculture of hardwood forests in the Allegheny region. It provides a summary of silvicultural knowledge, and guidelines, decision tables, and step-by step instructions for determining silvicultural prescriptions in individual stands
Доп.точки доступа:
Stout, S.L.; Ernst, R.L.
Экземпляры всего: 1
ИЛ-ИФ (1)
Свободны: ИЛ-ИФ (1)
| УДК |
Аннотация: This publication brings together the results of 20 years of research and experience in the silviculture of hardwood forests in the Allegheny region. It provides a summary of silvicultural knowledge, and guidelines, decision tables, and step-by step instructions for determining silvicultural prescriptions in individual stands
Доп.точки доступа:
Stout, S.L.; Ernst, R.L.
Экземпляры всего: 1
ИЛ-ИФ (1)
Свободны: ИЛ-ИФ (1)
634.9
T79
T79
Foundations of silviculture upon an ecological basis Vol. 1
[Текст] : монография / J.W. Toumey. - New York : John Wiley and Sons, Inc., 1928. - 438 с. : рис. - ). - 50.00 р.
Аннотация: For many years, America has led the world in bringing about forest wastes and the forest devastation. As yet, only the foundation has been laid in forest renewal. The activity of man in brining about forest destruction makes the comprehensive study of reproduction on vast areas of utmost silvicultural importance. We cannot say at the present time what will be the accepted silvicultural practice on these areas. We can say that the difficult study and research that must determine the practice should be comprehensive. Through research and investigation of the forest, through the comprehension of the natural history of forests and through logical reasoning from cause to effect, silvics is rapidly taking its place as a science
Экземпляры всего: 1
ИЛ-ИФ (1)
Свободны: ИЛ-ИФ (1)
| УДК |
Аннотация: For many years, America has led the world in bringing about forest wastes and the forest devastation. As yet, only the foundation has been laid in forest renewal. The activity of man in brining about forest destruction makes the comprehensive study of reproduction on vast areas of utmost silvicultural importance. We cannot say at the present time what will be the accepted silvicultural practice on these areas. We can say that the difficult study and research that must determine the practice should be comprehensive. Through research and investigation of the forest, through the comprehension of the natural history of forests and through logical reasoning from cause to effect, silvics is rapidly taking its place as a science
Экземпляры всего: 1
ИЛ-ИФ (1)
Свободны: ИЛ-ИФ (1)
634.9
T79
T79
Seeding and planting in the practice of forestry
[Текст] : a manual for the guidance of forestry students, foresters, nurserymen, forest owners, and farmers / J.W. Toumey, C.F. Korstian. - 3rd. ed. . - New York : John Wiley and Sons, Inc., 1942. - 520 с. : рис. - eng. - Библиогр.: с. 498-500. - 26.25 р.
Аннотация: The third edition of this book deals with the production of nursery stock for planting on particular sites and the inauguration of greatly enlarged planting programs by federal, state, and private agencies. In this edition, very few cost figures are included for the various nursery and planting operations. In preparation of this edition, many helpful and constructive suggestions have been received from a number of American foresters.
Доп.точки доступа:
Korstian, C.F.
Экземпляры всего: 1
ИЛ-ИФ (1)
Свободны: ИЛ-ИФ (1)
| УДК |
Аннотация: The third edition of this book deals with the production of nursery stock for planting on particular sites and the inauguration of greatly enlarged planting programs by federal, state, and private agencies. In this edition, very few cost figures are included for the various nursery and planting operations. In preparation of this edition, many helpful and constructive suggestions have been received from a number of American foresters.
Доп.точки доступа:
Korstian, C.F.
Экземпляры всего: 1
ИЛ-ИФ (1)
Свободны: ИЛ-ИФ (1)
634.9
V29
V29
Variability and ecology of Siberian larch species
[Текст] : монография / A.P. Abaimov, J.A. Lesinski, O. Martinsson, L.I. Milyutin ; Swedish University of Agricultural Sciences Department of Silviculture. - Umea : Swedish Univ. of Agr. Sci. Department of Silviculture, 1998. - 123 с. : рис., табл. - (Swedish University of Agricultural Sciences, Department of Silviculture Reports, ISSN 0348-8969 ; 43). - eng. - Библиогр.: с. 106-123. - Б. ц.
Аннотация: There is a growing interest in Siberian larch species among researchers and practicioners from abroad, mainly due to their fast growth and excellent wood properties. Some attempts of introducing Siberian larch species as commercial plantations have already been initiated in western countries. However, the knowledge of botanical, ecological and silvicultural features of Siberian larch species is rather poor outside of Russia. Because of its economic importance for Russian forestry the Siberian larch species have been comprehensively studied for many years and many papers as well as a number of monographs have been published, most of them in Russian. The large Russian expertise concerning regionalisation of seed sources, seed crop and quality, seed orchards, seedling production in nurseries and silvicultural practices in commercial plantations beyond their range of natural distribution is presented in this report. May it support foreign foresters in their efforts to enlarge use of Siberian larch species.
Доп.точки доступа:
Abaimov, A.P.; Lesinski, J.A.; Martinsson, O.; Milyutin, L.I.
Экземпляры всего: 1
ИЛ-ИФ (1)
Свободны: ИЛ-ИФ (1)
| УДК |
Аннотация: There is a growing interest in Siberian larch species among researchers and practicioners from abroad, mainly due to their fast growth and excellent wood properties. Some attempts of introducing Siberian larch species as commercial plantations have already been initiated in western countries. However, the knowledge of botanical, ecological and silvicultural features of Siberian larch species is rather poor outside of Russia. Because of its economic importance for Russian forestry the Siberian larch species have been comprehensively studied for many years and many papers as well as a number of monographs have been published, most of them in Russian. The large Russian expertise concerning regionalisation of seed sources, seed crop and quality, seed orchards, seedling production in nurseries and silvicultural practices in commercial plantations beyond their range of natural distribution is presented in this report. May it support foreign foresters in their efforts to enlarge use of Siberian larch species.
Доп.точки доступа:
Abaimov, A.P.; Lesinski, J.A.; Martinsson, O.; Milyutin, L.I.
Экземпляры всего: 1
ИЛ-ИФ (1)
Свободны: ИЛ-ИФ (1)
634.9
B 29
B 29
Some interrelationships of silviculture and logging
[Текст] / G.L. Baskerville. - Ottawa : Canadian Department of Forestry Research Branch , 1965. - 7 с. : табл. - (Pulp and Paper Magazine of Canada / Department of Forestry, Research Branch ; june). - eng. - Библиогр.: с. 7. - 0.05 р.
Аннотация: Data for natural stands of 700, 1000, 1500, 2000, 3000 and 5000 stem per acre are analyzed to show the influence of changing stand structure on both forest growth and cost harvesting. Inferences are drawn regarding the effect of thinning on stand growth and logging cost. It is noted that silvicultural control can be used only to produce more wood but also to produce a forest which is less costly to harvest.
Экземпляры всего: 1
ИЛ-ИФ (1)
Свободны: ИЛ-ИФ (1)
| УДК |
Аннотация: Data for natural stands of 700, 1000, 1500, 2000, 3000 and 5000 stem per acre are analyzed to show the influence of changing stand structure on both forest growth and cost harvesting. Inferences are drawn regarding the effect of thinning on stand growth and logging cost. It is noted that silvicultural control can be used only to produce more wood but also to produce a forest which is less costly to harvest.
Экземпляры всего: 1
ИЛ-ИФ (1)
Свободны: ИЛ-ИФ (1)
634.96
T 35
T 35
10th World Forestry Congress
[Текст] : vol.5: Forests, a heritage for the future; Sector D: Management of the forest heritage. - Paris : OAA/FAO, 1991. - 334 с. : tables. - (Revue Forestiere Francaise; Hors Serie : vol. 5: Forests, a heritage for the future; Sector D: Management of the forest heritage; 2e partie, ISSN 0035-2829 ; 5). - Библиогр: at the end of the papers. - 10-02 р.
Экземпляры всего: 1
ИЛ-Иф (1)
Свободны: ИЛ-Иф (1)
| УДК |
Экземпляры всего: 1
ИЛ-Иф (1)
Свободны: ИЛ-Иф (1)
634.9T
V 53
V 53
An analysis of measures of density in even-aged balsam fir and jack pine stands
[Текст] / P.E. Vezina ; Canada Department of Forestry. - Ottawa : Canada Department of Forestry, Forest Research Branch, 1964. - 474-481 с. + table. - (Forest Research Branch Contribution / Canada Department of Forestry ; 620). - Библиогр: p. 481. - 0-05 р.
Аннотация: The concept of stand density is fundamental in forestry. Investigations of problems of mensuration, growth and yield, and silviculture need to consider density as one of the main stand variables. Several methods of expressing density were defined and discussed in an earlier study (Vezina 1963a). This paper discusses the results obtained in testing some common methods of expressing stand density in relation to crown closure of both balsam fir (Abies balsamea (L.) Mill.) and jack pine (Pinus banksiana Lamb.). stands in Quebec. A more general objective was to discuss the development of the stand density concept: how it developed in the past and how one may expect it to develop in the future.
Экземпляры всего: 1
ИЛ-Иф (1)
Свободны: ИЛ-Иф (1)
| УДК |
Аннотация: The concept of stand density is fundamental in forestry. Investigations of problems of mensuration, growth and yield, and silviculture need to consider density as one of the main stand variables. Several methods of expressing density were defined and discussed in an earlier study (Vezina 1963a). This paper discusses the results obtained in testing some common methods of expressing stand density in relation to crown closure of both balsam fir (Abies balsamea (L.) Mill.) and jack pine (Pinus banksiana Lamb.). stands in Quebec. A more general objective was to discuss the development of the stand density concept: how it developed in the past and how one may expect it to develop in the future.
Экземпляры всего: 1
ИЛ-Иф (1)
Свободны: ИЛ-Иф (1)
634.9T
W 68
W 68
Crown size and stem diameter in red spruce and balsam fir
[Текст] / B.C. Wile ; Canada Deapartment of Forestry. - Ottawa : Canada Department of Forestry, 1964. - 9 с. : Table. - (Forest Research Branch / Canada Department of Forestry ; 1056). - Библиогр: p. 9. - 0-10 р.
Аннотация: Some relationships between crown size and stem diameter at breast height having application in silviculture, aerial inventories of forest resources and fire protection, were determined from 48 red spruce and 80 balsam fir growing together in the same stands. For trees of the same d.b.h., spruce crowns vary in width and average slightly wider than fir crowns, lengths are similar for both species, but spruce crowns are much heavier. All relationships examined were highly significant for both species but the strongest correlation was between d.b.h. and crown weight.
Экземпляры всего: 1
ИЛ-Иф (1)
Свободны: ИЛ-Иф (1)
| УДК |
Аннотация: Some relationships between crown size and stem diameter at breast height having application in silviculture, aerial inventories of forest resources and fire protection, were determined from 48 red spruce and 80 balsam fir growing together in the same stands. For trees of the same d.b.h., spruce crowns vary in width and average slightly wider than fir crowns, lengths are similar for both species, but spruce crowns are much heavier. All relationships examined were highly significant for both species but the strongest correlation was between d.b.h. and crown weight.
Экземпляры всего: 1
ИЛ-Иф (1)
Свободны: ИЛ-Иф (1)