Author: James B. Baker Publisher: ISBN: Category : Loblolly pine Languages : en Pages : 76
Book Description
A half-century of experience and research with uneven-aged silviculture in loblolly-shortleaf pine stands in the South are summarized in this publication, and silvicultural guidelines for developing and managing uneven-aged stands are provided.
Author: Publisher: ISBN: Category : Loblolly pine Languages : en Pages : 65
Book Description
A half-century of experience and research with uneven-aged silviculture in loblolly-shortleaf pine stands in the South are summarized in this publication, and silvicultural guidelines for developing and managing uneven-aged stands are provided.
Author: Ching-Rong Lin Publisher: ISBN: Category : Loblolly pine Languages : en Pages : 16
Book Description
A density-dependent matrix growth model of uneven-aged loblolly pine stands was developed with data from 991 permanent plots in the southern United States. The model predicts the number of pine, soft hardwood, and hard hardwood trees in 13 diameter classes, based on equations for ingrowth, upgrowth, and mortality. Projections of 6 to 10 years agreed with the growth of stands between the last two inventories. In 300-year simulations of undisturbed growth, softwood species were replaced by hardwoods, in accord with previous knowledge. Soft hardwood species became dominant on good sites and hard hardwoods on poor sites. Basal area oscillated over time, converging slowly towards a steady state. Changes in tree size diversity were correlated positively with basal area. Without disturbance, species diversity would decrease. For economic analysis, equations were developed to predict total tree height, sawlog length and volume, pulpwood volume, and volume of top sawtimber, as functions of tree diameter and stand basal area. Simulations of three cutting regimes showed that management would lead to a steady state faster than would natural growth. Management aimed at maintaining the current average distribution would result in size and species diversity similar to that of an unmanaged stand. From a financial point of view, the q-factor guide and a 13-in.- (330-mm-) diameter-limit cut would be superior to the average current management regime. The diameter-limit regime would have the greatest effect on lowering tree size diversity and an effect on species diversity similar to that of the q-factor guide. A computer program, SOUTHPRO, was developed to simulate the effects of other management alternatives.
Author: Kevin O'Hara Publisher: OUP Oxford ISBN: 0191007579 Category : Science Languages : en Pages : 305
Book Description
This book presents the latest scientific and management information on multiaged silviculture, an emerging strategy for managing forestry systems worldwide. Over recent decades, forest science and management have tended to emphasize plantation silviculture. Whilst this clearly meets our wood production needs, many of the world's forests need to be managed far less intensively and more flexibly in order to maintain their natural ecosystem functions together with the values inherent in those processes. Developing multiaged management strategies for these complex forest ecosystems represents a global challenge to successfully integrate available science with sustainable management practices. Multiaged Silviculture covers the ecology and dynamics of multiaged stands, the management operations associated with regeneration, tending, and stocking control, and the implications of this strategy on production, genetic diversity, and stand health. It is primarily aimed at graduate level students and researchers in the fields of forestry and silviculture, but will also be of relevance and use to all professional foresters and silviculturists.
Author: James B. Baker
Author: United States. Forest Service
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Author: Ching-Rong Lin
Author: Gordon G. Mark
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Author: Kevin O'Hara
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Author: James D. Haywood