Masam – a flexible stand density management model for meeting diverse structural objectives in multiaged stands

O’Hara, Kevin L.; Valappil, Narayanan I.

doi:10.1016/s0378-1127(98)00486-1

Cited by 31 publications

(12 citation statements)

References 14 publications

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“…Because of the severity of these treatments, longer cutting cycles would be necessary to provide time for the stand to return to full site occupancy and maximum productivity (O'Hara and Valappil, 1999). For a transition from old forest stands to managed second-or third-growth stands, silviculturists are often faced with large gaps between old redwood forest stumps.…”

Section: Management Implicationsmentioning

confidence: 99%

Understory stump sprout development under variable canopy density and leaf area in coast redwood

O’Hara

Stăncioiu²,

Spencer

2007

Forest Ecology and Management

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Section: Management Implicationsmentioning

confidence: 99%

Understory stump sprout development under variable canopy density and leaf area in coast redwood

O’Hara

Stăncioiu²,

Spencer

2007

Forest Ecology and Management

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“…Tree spacing has been used to describe the growth resources available to potential crop trees in mixedage stands (Reineke, 1933;Vanclay, 1994;O'Hara and Valappil, 1999), and it may provide the most effective indicator of stem diameter increment (Primack et al, 1985). However, Wadsworth (1953) and Dawkins (1963) recognised that the position of a tree crown within the canopy influenced its shape and general condition, as well as its size.…”

Section: Discussionmentioning

confidence: 99%

Stem and crown dimensions as predictors of thinning responses in a crowded tropical rainforest plantation of Flindersia brayleyana F. Muell.

Brown

Doley

Keenan³

2004

Forest Ecology and Management

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“…Basal area is biologically linked to the cross-sectional area of sapwood, hence, leaf area index and the total foliar display of the stand (O'Hara and Valappil 1999;O'Hara et al 2001;O'Hara and Gersonde 2004). Basal area may also be used for expressing stand condition relative to stocking, competition, and prospects for regeneration success.…”

Section: Methods Based On Proportional Basal Areamentioning

confidence: 99%

Proportional basal area method for implementing selection silviculture systems in longleaf pine forests

2014

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Proportional basal area (Pro-B) was developed as an accurate, easy-to-use method for making uneven-aged silviculture a practical management option. Following less than 3 h of training, forest staff from a range of professional backgrounds used Pro-B in an operational-scale field study to apply single-tree selection and group selection systems in longleaf pine (Pinus palustris Mill.) stands. Field crews achieved precision levels often within 3%-5% of the 11.5 m 2 ·ha −1 target residual basal area. By aggregating many diameter classes into only three diameter-class groups, Pro-B improves efficiency by requiring tree markers to remember only three fractions, while making a single pass through the stand. Trees of large size, specific species and with good form, broad crowns and cavities can be retained, while adjusting spacing to release residuals. Systematic quantification of marking trees for removal enables different individuals to obtain similar results. Early observations revealed encouraging levels of pine regeneration and stand development, along with continuing good volume growth rates of 3% per year. Although less certain until one or more cutting cycles are completed, these early tests indicate that a stable mature forest structure should develop, which is characterized by the presence of large trees and natural regeneration.Résumé : La surface terrière proportionnelle (ST-Pro) est une méthode précise et facile d'utilisation qui a été mise au point pour que la sylviculture inéquienne devienne une option pratique d'aménagement. Avec moins de trois heures d'entraînement, du personnel forestier provenant de divers milieux professionnels a utilisé ST-Pro dans le cadre d'une étude de terrain à l'échelle opérationnelle pour appliquer les systèmes de jardinage par pied d'arbre et par groupe à des peuplements de pin des marais (Pinus palustris Mill.). Les équipes de terrain ont souvent atteint des niveaux de précision variant entre 3 et 5 % de la valeur cible de surface terrière résiduelle qui était de 11,5 m 2 ·ha −1 . En regroupant plusieurs classes de diamètre en seulement trois groupes, la ST-Pro augmente l'efficacité en demandant aux marteleurs de ne retenir que trois fractions lors de leur passage unique dans le peuplement. Des arbres de grande taille, d'espèces particulières et ayant une belle forme, une large cime et des cavités peuvent être retenus tout en ajustant l'espacement entre les arbres résiduels. La quantification systématique des arbres marqués pour la récolte permet à différentes personnes d'obtenir des résultats similaires. Des observations préliminaires ont montré que la régénération en pin et le développement des peuplements montraient des signes encourageants tout en maintenant un bon taux de croissance en volume de 3 % par année. Bien que les résultats soient incertains jusqu'à ce qu'au moins un cycle de coupe soit complété, ces tests préliminaires indiquent qu'une structure stable de forêt mature devrait se développer, ce qui se caractérise par la présence de gros arbres et de régénération...

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Masam – a flexible stand density management model for meeting diverse structural objectives in multiaged stands

Cited by 31 publications

References 14 publications

Understory stump sprout development under variable canopy density and leaf area in coast redwood

Understory stump sprout development under variable canopy density and leaf area in coast redwood

Stem and crown dimensions as predictors of thinning responses in a crowded tropical rainforest plantation of Flindersia brayleyana F. Muell.

Proportional basal area method for implementing selection silviculture systems in longleaf pine forests

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