Using Tree Growth and Yield Simulators to Create Ecological Yield Tables for Silvicultural Prescriptions

1994 ◽  
Vol 9 (3) ◽  
pp. 91-94 ◽  
Author(s):  
Tara M. Barrett ◽  
Lawrence S. Davis ◽  
Frieder G. Schurr
Keyword(s):  
Spatial Distribution ◽  
Tree Growth ◽  
Forest Structure ◽  
Temporal Changes ◽  
Wildlife Habitat ◽  
Growth And Yield ◽  
Target Distribution ◽  
Dynamic Target ◽  
Silvicultural Prescriptions

Abstract Several authors have suggested using silviculture to create a dynamic target distribution of forest structures across the landscape in managing for both biodiversity and production of outputs (Harris 1984, Oliver 1992, Swanson and Franklin 1992). If forest structure (the dynamic spatial distribution and composition of tree vegetation) is known, it can be used for predicting changes in wildlife habitat, biodiversity, and output production. This paper describes a method for using tree growth and yield simulator output to classify temporal changes in forest structure associated with applying silvicultural prescriptions. West. J. Appl. For. 9(3):91-94.

scholarly journals Spatial distribution of spruce trees in the nature reserve 'Jankove bare' on mt. Kopaonik

2009 ◽  
pp. 191-204
Author(s):  
Branko Stajic ◽  
Milivoj Vuckovic ◽  
Marko Smiljanic
Keyword(s):  
Spatial Distribution ◽  
Tree Growth ◽  
Environmental Conditions ◽  
National Park ◽  
Nature Reserve ◽  
Distance Methods ◽  
Study Results

The methodology and applicability of the study of spatial distribution of trees in Serbian forestry have been insufficiently reported and presented. This paper, based on mathematical?statistical principles, analyses the method of spatial distribution of spruce trees in the Nature Reserve 'Jankove Bare' in the National Park 'Kopaonik'. The following methods in the group of distance methods were applied: Kotar's method (1993), T2?method, and the index of distance dispersion (Johnson, Zimmer, 1985). The study results in a pure uneven-aged spruce stand based on all three methods showed that spruce trees are randomly distributed over the stand area. Therefore, environmental conditions in the study stand can be regarded as homogeneous and equally suitable for tree growth, and there are no significant interactions between the trees, which could cause a higher competition between the trees for nutrients, water, etc.

Frequency of Herbicide Applications to Coffee Groves

1969 ◽  
Vol 64 (3) ◽  
pp. 249-258
Author(s):  
Elvin G. Boneta García
Keyword(s):  
Weed Control ◽  
Tree Growth ◽  
Tree Mortality ◽  
Growth And Yield ◽  
Coffee Production ◽  
Coffee Yield ◽  
Agricultural Experiment

Dowpon, Roundup, Gramoxone and mixtures of Karmex with Dowpon or Gramoxone applied with different frequency were evaluated for weed control in young sun-grown coffee trees at Adjuntas Agricultural Experiment Substation, located at lat. 18° N. and long. 66°48' W., and at an elevation of 588 m. Gramoxone (0.95 L/ha) applied at one- or two-month intervals provided excellent weed control. Dowpon at 5.65 and 11.30 kg/ha was equally effective on grasses but ineffective on broadleaves. Roundup (1.90 L/ha) provided good weed control without producing detrimental effects on tree growth and yield. The addition of Karmex to the Gramoxone or Dowpon solution to increase effectiveness in control is questionable. Tree mortality was higher and coffee yield lower when Karmex was added to the solution than when either Gramoxone or Dowpon was used alone. When Dowpon was applied at a rate of 11.30 kg/ha, coffee production was significantly higher than production of the remaining treatments, except for that of the application of 5.65 kg/ha of Dowpon at 12-week interval. The production of the latter plots was significantly higher than that of plots in which Karmex (2.26 kg/ha) was added to the Dowpon (5.65 kg/ha) or the Gramoxone solution (0.95 L/ha) and applied each at 12-week intervals. Coffee yield when the weeds were controlled by Roundup (1.90 L/ha) or Gramoxone (0.95 L/ha) was significantly higher than that when Karmex (2.26 kg/ha) was added to the Gramoxone solution and applied every 12 weeks.

scholarly journals Integrating Wildlife into the Managed Forest

1985 ◽  
Vol 61 (2) ◽  
pp. 146-149
Author(s):  
Hal Salwasser
Keyword(s):  
Forest Management ◽  
Management Plan ◽  
Wildlife Habitat ◽  
Growth And Yield ◽  
Multiple Use ◽  
Vegetation Growth ◽  
Resource Managers ◽  
Coordination Work ◽  
The Right ◽  
Effective Use

Integrating wildlife habitat concerns into multiple-use forest management requires four things: 1) the right attitude, 2) a process for systematic resource coordination, 3) models that relate forest conditions to wildlife outputs, and 4) the effective use of monitoring to support an adaptive management strategy. These four things reflect that resource managers must first want to make forestry-wildlife coordination work, that they need a mechanism for doing it, that they need habitat criteria for meeting wildlife goals, and that we only know enough at this time to get pointed in the right direction.Comprehensive goals for timber and wildlife are set early in successful forestry-wildlife integration. The goals provide for maintaining habitat and wildlife diversity while simultaneously producing consumable surpluses of timber and game in relation to demands for those products. Comprehensive inventories and vegetation growth and yield models are used to analyze the current management situation and show the need for actions to meet goals. The wildlife yield models are species-habitat relationships functions that relate habitat conditions to wildlife outputs by species. The management plan developed constitutes a coordinated set of resource objectives and the schedule of practices that will achieve them in an efficient way. Monitoring the effects of the practices is used to learn whether assumptions and models used in planning need to be revised, and whether the course of management needs to be adjusted to meet the goals. Key words: Forest management, Wildlife management, integration, Wildlife habitat, Multiple use planning.

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