Distribution of the Jack-pine Budworm in the Tree Crown and the Development of a Technique for Sampling Populations PDF Download
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Author: John Louis Foltz
Publisher:
ISBN:
Category : Ecology
Languages : en
Pages : 74
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Book Description
Author: John Louis Foltz
Publisher:
ISBN:
Category : Ecology
Languages : en
Pages : 74
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Book Description
Author: National Agricultural Library (U.S.)
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 652
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Book Description
Author:
Publisher:
ISBN:
Category : Spruce budworm
Languages : en
Pages : 70
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Book Description
Author:
Publisher:
ISBN:
Category : Natural history
Languages : en
Pages : 1068
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Book Description
A refereed, broad-spectrum journal publishing basic research in diverse disciplines in biology and varied taxa.
Author:
Publisher:
ISBN:
Category : Forest genetics
Languages : en
Pages : 492
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Book Description
Author: Bozzano G Luisa
Publisher: Elsevier
ISBN: 032313873X
Category : Technology & Engineering
Languages : en
Pages : 652
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Book Description
This comprehenisive text approaches the subject from an ecological/evolutionary biological perspective. The assumption is that one cannot study forest insects without understanding the dynamics of the relationship between an insect and its host plant. This relationship includes knowing what factors control forest insect populations such as food, food quality, tree vigor, host selection, and symbiotic relationships. The authors also discuss tree-injuring insects from the perspective of their influence on tree physiology and growth as well as economic and commercial effects. The book represents a "modern" approach to the topic of forest and shade tree insects; is well-illustrated; and includes a comprehensive primary reference list.
Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 550
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Book Description
Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 1370
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Book Description
Author:
Publisher:
ISBN:
Category : Forest canopies
Languages : en
Pages : 92
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Book Description
The Forest Inventory and Analysis (FIA) Program of the Forest Service, U.S. Department of Agriculture, conducts a national inventory of forests across the United States. A systematic subset of permanent inventory plots in 38 States is currently sampled every year for numerous forest health indicators. One of these indicators, crown-condition classification, is designed to estimate tree crown dimensions and assess the impact of crown stressors. The indicator features eight tree-level field measurements in addition to variables traditionally measured in conjunction with FIA inventories: vigor class, uncompacted live crown ratio, crown light exposure, crown position, crown density, crown dieback, foliage transparency, and crown diameter. Indicators of crown health derived from the crown data are intended for analyses at the State, regional, and national levels, and contribute to the core tabular output in standard FIA reports. Crown-condition measurements were originally implemented as part of the Forest Health Monitoring (FHM) Program in 1990. Except for crown diameter, these measurements were continued when the FIA Program assumed responsibility for FHM plot-based detection monitoring in 2000. This report describes in detail the data collection and analytical techniques recommended for crown-condition classification.
Author:
Publisher:
ISBN:
Category : Forest management
Languages : en
Pages : 542
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Book Description
