The Impact of Harvesting on Forest Site Quality

Grey, D. C.; Jacobs, Erica

doi:10.1080/00382167.1987.9630071

Cited by 11 publications

(7 citation statements)

References 28 publications

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“…Many trials and a number of worldwide literature reviews have shown that soil disturbance and compaction resulting from harvesting often increase seedling mortality and reduce tree growth (Murphy 1982, Grey and Jacobs 1987, Skinner et al 1989, Minore and Weatherley 1990, Wronski and Murphy 1994. However, the effects of compaction on tree growth can vary with soil texture.…”

Section: Introductionmentioning

confidence: 99%

Impacts of forest harvesting related soil disturbance on end-of-rotation wood quality and quantity in a New Zealand radiata pine forest

Murphy¹,

Brownlie²,

Kimberley³

et al. 2009

Silva Fenn.

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The long-term effect of soil disturbance (litter removal, topsoil removal and compaction) from forest harvesting on wood quality and quantity of second-rotation Pinus radiata growing on a clay loam soil, was assessed at the end the rotation, 26 years after planting. Relative to Control plots, average tree and stand total volume at rotation end was not significantly affected by litter removal and nil or light compaction, but was significantly reduced by 28% by litter and topsoil removal and moderate subsoil compaction, and further reduced by 38% by heavy compaction. Wood density at breast height in the inner rings of trees in the most disturbed treatments was elevated by up to 30 kg m-3. This occurred because these treatments were more N deficient as reflected by foliar N levels during the first 11 years of growth relative to the Control. However, no treatment differences in wood density were evident in outer rings, and by rotation age overall mean density did not differ significantly between treatments. Neither acoustic velocity of standing trees, nor acoustic velocity of logs, was significantly affected by soil disturbance, indicating that stiffness of lumber cut from trees in the trial was likely to be similar for all treatments. Economic impacts of soil disturbance and compaction on this soil type will therefore result largely from the considerable negative impacts on final tree size, with little or no compensation from improved wood properties.

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Section: Introductionmentioning

confidence: 99%

Impacts of forest harvesting related soil disturbance on end-of-rotation wood quality and quantity in a New Zealand radiata pine forest

Murphy¹,

Brownlie²,

Kimberley³

et al. 2009

Silva Fenn.

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“…En outre, les méthodes et techniques d'exploitation forestière ont fortement évolué durant les 2 dernières décen-nies, avec l'apparition d'engins spécifiques à la forêt de plus en plus lourds (jusqu'à 50 tonnes en charge) dont les effets sont mal connus [1]. La question qui se pose est de savoir si les différentes techniques d'exploitation ont des effets différents sur l'état de surface du sol des coupes [6] et, par voie de conséquences, des effets probablement différents sur les caractéristiques écologiques associées au sol [13,15]. L'objectif de cet article est de comparer avec une mé-thode standardisée au niveau européen [20] les états de surface du sol résultants d'exploitations conduites avec des techniques différentes.…”

Section: Introductionunclassified

Effets des techniques d'exploitation foresti�re sur l'�tat de surface du sol

Deconchat

2001

Ann. For. Sci.

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Résumé -L'utilisation d'une méthode standardisée de description de l'état de surface du sol dans des coupes du sud-ouest de la France permet de montrer que l'exploitation forestière laisse en moyenne 30 % de la surface du sol non perturbée, couvre 32 % par des réma-nents, perturbe légèrement 29 % et affecte fortement 9 %. Les techniques traditionnelles d'exploitation laissent moins de rémanents, dont le volume apparent peut être estimé avec la méthode, l'utilisation de skidder provoque plus d'impact forts. L'étude montre d'une part la faisabilité d'une description standardisée des états de surface d'une coupe et d'autre part la variabilité qui existe entre les techniques d'exploitation. On peut supposer qu'elles auront donc des conséquences différentes sur la biodiversité. Des améliorations méthodo-logiques sont proposées afin de faciliter la comparaison des techniques d'exploitation forestière. exploitation forestière / état de surface du sol Abstract -Effects of logging techniques on the soil surface. A standardised method for the description of the ground surface in logged area in south-western France shows that 30% of the area remain without perturbation, 32% are covered by slash, 29% are slightly perturbed and 9% are heavily perturbed. Traditional logging techniques keep less slash (the volume could be estimated by the method), the use of skidder induces more heavy impacts. The study shows on one hand the feasibility of a standardised description of ground surface in logged areas, and on the other hand, the variability between logging techniques. They should have different effects on biodiversiy. Methodological improvements are proposed to compare logging techniques. logging / ground surface perturbation

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“…While the potential for soil compaction to reduce productivity of plantation forests has been long understood (Froehlich 1973), the magnitude of potential loss of productivity is often not quantified (see for example the discussion of South African forestry by Grey and Jacobs 1987). Indeed, Greacen and Sands (1980) and Lacey (1993) suggest that the effects of compaction in plantations are not always conspicuous or easily quantified.…”

Section: Introductionmentioning

confidence: 95%

“…The nature and extent of mechanical soil compaction often has high spatial variability due to variations in soil condition, surface residue and machine impacts (Greacen and Sands 1980;Grey and Jacobs 1987;Taylor and Brar 1991;Costantini 1995a). This variability can obscure growthrelated effects, especially where other edaphic, genetic, biological and silvicultural factors affecting growth are also variable.…”

Section: Introductionmentioning

confidence: 98%

Management of compaction during harvest ofPinusplantations in Queensland: II. Preliminary evaluation of compaction effects on productivity

Costantini

Doley

2001

Australian Forestry

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Two retrospective studies were conducted in the coarsetextured, coastal lowland soils of south-eastern Queensland to provide a preliminary assessment of compaction affects on the productivity of Pinus plantations.In the first study, stem wood volume of a 9-year-old plantation established on a site used as a log dump during clearfell harvest of the first rotation was reduced by 40.3%. There was a clear link between persistent compaction, reduced root development and reduced wood production. Standard site preparation and cultivation operations used at the time of second rotation establishment did not ameliorate compaction damage. A number of operational measures are suggested for minimising the impact of log dumps on plantation productivity.In the second study, dendro-chronological techniques were used to determine annual basal area increments (BAis) of crop trees following thinning operations that resulted in rut compaction of various intensities. The methodology allowed both positive growth responses to thinning and adverse growth responses from compaction to be identified. BAI reduction was most prominent in larger trees adjacent to rut compaction exceeding 10 em depth. For example, BAI of trees with a 27.5 em underbark diameter adjacent to ruts 15 and 35 em deep was reduced by 17% and 29% respectively compared to increment of those adjacent to ruts 0 em deep. The study provides support for proscribing rut compaction exceeding 1 0 em in depth.

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The Impact of Harvesting on Forest Site Quality

Cited by 11 publications

References 28 publications

Impacts of forest harvesting related soil disturbance on end-of-rotation wood quality and quantity in a New Zealand radiata pine forest

Impacts of forest harvesting related soil disturbance on end-of-rotation wood quality and quantity in a New Zealand radiata pine forest

Effets des techniques d'exploitation foresti�re sur l'�tat de surface du sol

Management of compaction during harvest ofPinusplantations in Queensland: II. Preliminary evaluation of compaction effects on productivity

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