Construction of Variable-Density Empirical Yield Equations from Forest Management Inventory Data

1990 ◽  
Vol 7 (3) ◽  
pp. 110-113
Author(s):  
David K. Walters ◽  
Alan R. Ek ◽  
David Czysz
Keyword(s):  
Forest Management ◽  
Data Aggregation ◽  
Variable Density ◽  
Forest Owner ◽  
Inventory Data ◽  
Average Yield ◽  
Fitting Procedure ◽  
Analysis Methodology ◽  
Yield Trends ◽  
Or Manager

Abstract Using simple concepts, forest management inventory data, and microcomputers for analysis, methodology is described whereby a forest owner or manager can construct yield equations quickly and economically. Models such as these should adequately explain the average yield trends in the data and can be adjusted, through the use of ratios, to specific stand information. Steps and cautions in choice of model form, data aggregation, and fitting procedure are discussed and illustrated. Assumptions and procedures for model implementation are also described. North. J. Appl. For. 7:110-113, September 1990.

scholarly journals Promoting Landscape-Level Forest Management in Fire-Prone Areas: Delegate Management to a Multi-Owner Collaborative, Rent the Land, or Just Sell It?

Forests ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 22
Author(s):  
Ana Martins ◽  
Ana Novais ◽  
José Lima Santos ◽  
Maria João Canadas
Keyword(s):  
Forest Management ◽  
A Priori ◽  
Policy Option ◽  
Small Scale ◽  
Forest Owner ◽  
Target Area ◽  
Management Options ◽  
Forest Ownership ◽  
Landscape Level Management ◽  
Landscape Level

Forest management at the landscape level is a requirement for reducing wildfire hazard. In contexts where non-industrial private forest ownership prevails, the collaboration among multiple owners has been proposed as the way forward to reach consistent fuel management at that level. The current literature has been focused on identifying the factors that lead to collaboration among owners. In this study we explored other ways to reach landscape-level management in addition to the collaborative way, such as those that may be promoted through land renting or selling. Different contexts and owner types may require different solutions. Thus, we explicitly asked which alternative would be chosen by a given forest owner, from the following set: keeping individual management, entering a multi-owner collaborative arrangement where they delegate management, renting to a pulp company; or selling the land. In a context of small-scale ownership and high recurrence of wildfires in Portugal, a face-to-face survey was carried out to a sample of landowners. Our results suggest that there is not an a priori generalized unwillingness of owners to delegate management, rent or sell the land and thus they seem prone to align themselves with policy strategies to promote management at the landscape level. Multinomial logit regression modelling allowed us to explain and predict owners’ choices among the aforementioned set of alternative management options. We found that choosing multi-ownership collaboration, as opposed to keeping current individual management, is associated with passive management under harsher conditions, by non-residents without bonding capital. The identified factors of owners’ choices show the limited scope of tenancy and land-market mechanisms to promote landscape-level management. The best policy option was found to depend on the owner profiles prevailing in the target area. This suggests that studying the existing context and owner types is required to design effective policies.

scholarly journals Further Development of a New Concept in Small Scale Forestry: “Forest-Management-Service-Contracts” in Bavaria

2021 ◽  
Vol 7 (3) ◽  
pp. 7-11
Author(s):  
Dr. Michael Lutze
Keyword(s):  
Forest Management ◽  
Economic Analysis ◽  
Success Factors ◽  
Process Analysis ◽  
Small Scale ◽  
Forest Owner ◽  
Management Service ◽  
Service Contracts ◽  
And Performance ◽  
Further Development

The forests in Bavaria cover about one third of its land area or 2.56 Mio hectares (ha) and the major part of this forest is held by private forest owners. Around 700 000 landlords manage approximately 1.4 Mio ha. In Bavaria, about 130 Forest Owner Associations (FOAs) play a key role in managing the small scale forests. In the last years, a new concept in small scale forest management arose, “Forest-Management-Service-Contract” (FMSC). The statutory corporations needed a proper management for their forests accordingly the German forest laws and the FOA took the chance to adopt a new business concept. In Bavaria exist about 3000 forest-management-service-contracts, covering over 40.000 hectares. In a current project “Further development of the successful concept – Forest-Management-Service-Contracts – through economic analysis” will be elaborated a data base for the better understanding of the crucial to success factors of FMSC. The economic analysis of the FMSC will base on business process analysis related to the administration of FMSC, on economic operating figures deviated from a single contract analysis and performance data. This information base aims to optimize the contracting process and to reduce the risks related to unknown hazards of the single FMSC.

scholarly journals The pertinent role of forest inventory in making choice of silvicultural operations in community forests of Nepal

2018 ◽  
pp. 65-75 ◽  
Author(s):  
S. G. Baral ◽  
H. Vacik ◽  
B. B. K. Chhetri ◽  
K. Gauli
Keyword(s):  
Time Series ◽  
Forest Management ◽  
Forest Inventory ◽  
Sustainable Forest Management ◽  
Forest Stand ◽  
Inventory Data ◽  
Community Forests ◽  
Management Objectives ◽  
Management Plans ◽  
Stand Conditions

This paper explores the application of forest inventory to design silvicultural operations and its implementation to community forests. Four-time series forest inventory data (2005, 2010, 2013 and 2016) of Terai community forests were analysed, focusing on the type and size of tree removals from the forests. In addition, content analysis of the management plans of the forests was carried out and consultations were held with key informants. Though the forest inventory was prepared during the preparation of management plans, the results did not provide proper guidance on the selection of silvicultural operations, which were decided without a clear definition of the management objectives. They were very generic and largely ignored site-specific forest stand conditions. Most commonly practised silvicultural operations were cleaning and selective harvesting, which were similar for all forest blocks, though they varied in respect of forest stand conditions. The time series analysis of the inventory data showed that pole-sized trees were consistently removed in all four periods and emphasis was on extracting good quality trees without considering its effects on the stand. The study concludes that the current forest inventory is not very relevant in making a choice about silvicultural operations and the current practices might cause economic and ecological losses. Hence, we argued for identifying minimum forest management requirement necessary for the sustainable forest management that the silvicultural operations should be decided based on the management objectives and conditions of the forest, considering the ecological and economic value of the forest. Banko JanakariA Journal of Forestry Information for Nepal Special Issue No. 4, 2018, Page : 65-75

scholarly journals Thoreau, Muir, and Jane Doe: Different Types of Private Forest Owners Need Different Kinds of Forest Management

2006 ◽  
Vol 23 (1) ◽  
pp. 27-34 ◽  
Author(s):  
Andrew O. Finley ◽  
David B. Kittredge
Keyword(s):  
Forest Management ◽  
Target Population ◽  
Management Plan ◽  
Forest Owner ◽  
Private Forest ◽  
Government Control ◽  
Private Forest Owners ◽  
Forest Owners ◽  
Forest Ownership ◽  
Segmentation Analysis

Abstract We present a three-phase segmentation analysis designed to highlight the heterogeneity of forest ownership values and attitudes toward government control, privacy, and environmental protection held by a sample of Massachusetts private forest owners. This case study explores private forest owner characteristics that are associated with enrollment into Massachusetts' Chapter 61 current-use forest property tax program, which requires a professionally prepared 10-year forest management plan. We suggest the key to increasing landowner participation in forest management programs is to (1) recognize this heterogeneity of the target population, and (2) tailor the program to meet segment specific needs and desires.

scholarly journals Reconstructing past forest status using inventory and tree ring data to support uneven-aged forest management

2017 ◽  
Vol 63 (4) ◽  
pp. 203-211 ◽  
Author(s):  
Ladislav Kulla ◽  
Michal Bošeľa ◽  
Vlastimil Murgaš ◽  
Joerg Roessiger ◽  
Vladimír Šebeň
Keyword(s):  
Forest Management ◽  
Tree Ring ◽  
Forest Inventory ◽  
Management System ◽  
Inventory Data ◽  
Diameter Increment ◽  
Forest Inventory Data ◽  
Tree Ring Data ◽  
Species Specific ◽  
Forest Status

Abstract The decision to change forest management system from the traditional even-aged to the selection one based on statistical inventory is often limited by a missing previous inventory. To avoid this issue, we used available forest inventory data from ca 2 000 ha of mixed uneven-aged beech-fir-spruce-pine forest and tree ring data from 831 trees to reconstruct forest status from one decade ago. For this purpose, we have created three sets of species-specific models: 1) diameter-stump models to reconstruct the diameter of missing trees, 2) diameter-increment models based on tree ring data to estimate past diameters, and 3) height-diameter models to estimate past tree heights. This approach has allowed us to completely reconstruct the state of the forest as it was ten years ago and use the results as a substitution for a previously missing inventory.

scholarly journals Implementing the conditional value at risk approach for even-flow forest management planning

2016 ◽  
Vol 46 (5) ◽  
pp. 637-644 ◽  
Author(s):  
Kyle Eyvindson ◽  
Zhuo Cheng
Keyword(s):  
At Risk ◽  
Forest Management ◽  
Value At Risk ◽  
Net Present Value ◽  
Growth Models ◽  
Management Plan ◽  
Conditional Value At Risk ◽  
Forest Owner ◽  
Management Planning ◽  
Forest Management Planning

Deciding on a plan of action for a forest holding involves a significant amount of uncertainty. As forest planning involves the use and extraction of resources, uncertainty lies in both the future development of the forest (biological uncertainty) and the development of the market for forest-based products (economic uncertainty). Additionally, natural hazards can be a source of unexpected losses. In traditional forest management planning, the most common way to deal with uncertainty is to ignore it. Growth models are used that are assumed to be correct, and timber prices are assumed to be held constant. By ignoring the fact that these models provide only one representation of what may happen, the forest owner may get an overly optimistic (or pessimistic) view of the potential value of the forest holding. Through a stochastic programming formulation, these uncertainties can be modelled directly into the optimization formulation, and a management plan can be created that incorporates the risk preferences of the decisionmaker. This is highlighted through an example that maximizes the net present value of the holding while minimizing the conditional value at risk of obtaining a stated even flow of income.

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