Sustainability Attributes of a Small-Scale Betel Leaf Agroforestry System: A Case Study in North-eastern Hill Forests of Bangladesh

The Khasia ethnic community of Bangladesh has been a population of forest villagers in the north-eastern hill forests of Bangladesh since the early 1950s, practicing a betel leaf-based agroforestry system on land granted by the Forest Department. Taking a sample forest village of the Sylhet forest division as a case study, this article examines the sustainability attributes of betel leaf production in the agroforestry system. The presence of several positive attributes of sustainability including the composition of agroforestry, disease control, soil fertility management, profitability, socio-cultural acceptability and institutional support indicate that betel leaf production within the agroforestry system is stable under the prevailing traditional management system. Income from the sale of betel leaf is the principal livelihood means and villager’s reciprocal contributions help to conserve forest resources. However, problems with land ownership and regular agreement renewal need to be resolved for the sake of their livelihoods and forest conservation.

Non-operator landowner interest in agroforestry practices in two Missouri watersheds

Land tenure has long been considered a critical factor in determining the adoption and long-term maintenance of agroforestry practices. Empirical evidence from non-US settings has consistently shown that secure land tenure is positively associated with agroforestry adoption. In the US, over 40% of private agricultural land is farmed by someone other than the owner. Given the importance of land tenure in agroforestry decisions in other countries and the magnitude of non-operator landownership in the US, there has been surprisingly little focus on land tenure in the temperate agroforestry literature. Using data from a 1999 survey in Missouri, this study explores factors associated with non-operator landowner interest in agroforestry. Results suggest that differences in farming orientation are linked to interest in agroforestry. Closer ties to farming, stronger financial motivations for landownership, and higher proportion of land planted to row crops were negatively related to interest in agroforestry among non-operator landowners. Environmental or recreational motivations for landownership and contacts with natural resource professionals were positively associated with interest in agroforestry. These results, consistent with earlier qualitative research suggesting that farm operators who have a strong “conventional farming identity” were less interested in agroforestry, point to a divide between landowners for whom environmental and recreational values play an important role in ownership motivation and those for whom financial considerations take precedence. The findings imply that agroforestry development programs in the US should take non-operator landowners and their farming and ownership orientations into account when designing research and outreach efforts.

Virtual trees and light capture: a method for optimizing agroforestry stand design

In agroforestry systems, the distribution of light transmitted under tree canopies can be a limiting factor for the development of intercrops. The light available for intercrops depends on the quantity of light intercepted by tree canopies and, consequently, on the architecture of the tree species present. The influence of tree architecture on light transmission was analysed using dynamic 3D architectural models. The architectural analysis of Acacia mangium and Tectona grandis was performed in Indonesian agroforestry systems with trees aged from 1 to 3 years. 3D virtual trees were then generated with the AmapSim simulation software and 3D virtual experiments in which tree age, planting density, planting pattern and pruning intensity varied were reconstructed in order to simulate light available for the crop. Canopy closure of trees was more rapid in A. mangium than in T. grandis agroforestry systems; after 3 years the quantity of light available for A. mangium intercrops was three times lower than under T. grandis. Simulations with A. mangium showed that practices such as pruning and widening tree spacing enable to increase the total transmitted light within the stand. On T. grandis, modification of the tree row azimuth resulted in changes in the spatial and seasonal distribution of light available for the intercrops. These results are discussed in terms of agroforestry system management.

Examining disadoption of gum arabic production in Sudan

Gum arabic production in Sudan has developed over the years in a well-established traditional bush-fallow system in which the gum tree (Acacia senegal) is rotated with annual crops. Following the Sahel drought, the gum area has suffered from deforestation and gum production has declined. Several programs have been developed to stimulate gum production; however, many original adopters have disadopted gum production and the bush-fallow system. In this paper we apply a logit model to study the decision-making behavior of farmers in west Sudan and to identify the socio-economic factors influencing disadoption of gum production and gum agroforestry system. Variables that measure farmer’s wealth were found significant in explaining the disadoption behavior. Off-farm work was also found to positively influence the disadoption decision. Results show that a higher level of income from annual crops decreases the probability of disadoption, which suggests that annual crops and gum production do not compete but rather complement each other within the farm household economy. Therefore, policy measures aiming to boost the production of annual crops in the region might reduce seasonal labor migration and accordingly stimulate gum production.

Underutilized agroforestry food products in Amazonas (Venezuela): a market chain analysis

The worlds’ current food production system is focused on a limited number of crops. However, international food demand is increasingly looking for more diversified supplies. In the Venezuelan State Amazonas, the Piaroa indigenous people collect and cultivate several indigenous species with local, regional, national and even international potential. A participatory approach was used to select, in cooperation with these Piaroa people, a list of products for in-depth economic analysis and for introduction in agroforestry trials in a later phase. Seven agroforestry food products of this list were identified as underutilized. Primary data collected through consumer and trader surveys on the local markets and participatory exercises in selected Piaroa communities revealed that the main causes of underutilization are the general lack of transport, processing and market infrastructure in Amazonas; the lack of demand, due to a lack of product information; the lack of market information and cooperation between the different market chain actors; and the low productivity of the traditional slash and burn plots. Solutions to overcome the infrastructural constraints are sought by looking at the example set by a local NGO.

Valuing the benefits to the local community of supplying recreational facilities in community owned forests: an application of the contingent behaviour method

This research utilises a contingent behaviour valuation technique to value a number of improvements to recreational facilities in small-scale forests in Ireland. Willingness-to-pay estimates have previously been made for Coillte (Ireland’s state-owned forestry company) trails and forests. The total non-market value of Irish forests has also been examined. This paper adds to the literature by being the first to estimate the consumer surplus associated with recreational enhancements to Irish small-scale forest resources. The results presented indicate that community owned small-scale forestry can contribute enormously to the wellbeing of nearby urban residents, through the provision of outdoor recreational services.

The Upland Settlement Project of Bangladesh as a Means of Reducing Land Degradation and Improving Rural Livelihoods

Because of illegal logging, increased population pressure and intensified shifting cultivation, forest coverage of the Chittagong Hill Tracts (CHT) has decreased drastically resulting in land degradation. Many development projects have been implemented to combat forest loss and land degradation and also to improve the livelihoods of the hill people. This paper reports an empirical study of the Upland Settlement Project (USP) of Bangladesh which was undertaken to prevent land degradation and enhance the standard of living of the people. Planters were found to have given up shifting cultivation and adopted soil conserving agroforestry practices, and forest coverage has been increased in the project village. Interacting with project staff members, government officials and NGOs assisted planters in diversifying livelihood strategies thereby reducing dependency on project resources. Rich planters, utilizing their own capacity, expanded their income sources successfully. Poor planters still remain wage labourers because they do not have sufficient finance and networks to invest in productive ventures. Planters’ participation in project activities and the information flow between them and project staff were found to be minimal. Suggestions are made for the continuity of project functions, which involve greater participation of planters in rubber management functions, improved information flow, resolution of land tenure and greater equality in distribution of rubber revenue.

Consuming Fuel and Fuelling Consumption: Modelling Human Caloric Demands and Fuelwood Use

This paper describes a conceptual framework that was developed to integrate livestock, human, cultivation and forest constraints to model community fuelwood consumption over a 25-year planning horizon. This framework was constructed as an energy balance based on human caloric requirements in order to examine the effects of household-level decisions for nutrition, fuelwood and land use. A scenario from a virtual community in Uganda is presented to illustrate the utility of this model to allow rapid policy and scenario evaluation. User-defined inputs combined with published research data are used in simulating resource responses and energy consumption rates. This model is a potential tool to monitor fuelwood consumption and to understand the implications of various land-use practices.

Woodland Management and Public Good Outputs: Appraising the Trade-offs in English Woodlands

This paper examines the trade-offs between woodland management for timber and public good outputs in English woodlands. Recent evidence suggests that some public good values may be declining as a result of a lack of woodland management. Such under-management has been attributed to the decline in timber values and reduction in the productivity of woodlands and forests for timber products. It is argued that assessing the management needs of woodlands in order to enhance public good outputs presents a complex challenge and often depends on a variety of factors, including location, type of woodland, age, condition, substitutability and ownership motivation. However, in most instances a moderate level of management (whether for timber or otherwise) is likely to be beneficial for public good outputs.

The potential of auctioning contracts for conservation policy

This article studies the possibility of using auctions as a policy instrument in conservation programs. In particular, it provides insight into the main concerns that need to be dealt with when implementing conservation auctions. To show the cost saving potential of this policy instrument, we also calculate the social welfare improvement that can be obtained for an afforestation project in Flanders. When developing conservation policies, it is thus worthwhile to consider auctions as an alternative policy instrument.

Texture function application for wood ultrastructure description. Part 2: Application

The practical application of the orientation distribution function (ODF), being the three-dimensional representation of the texture function, was presented. The investigations of the crystallograpically organized regions of wood were performed. The experimental methods of the X-ray diffraction were discussed in detail. The incomplete pole figures were measured in order to calculate the ODF. The dominant components of the crystallographical texture of wood were determined from the obtained ODF. The obtained texture function was also used to derive the complete pole figures, additional non-measurable figures as well as inverse pole figures. The figures were used to perform additional analysis of the crystallographical organization. The traditional concept of the microfibril angle was enhanced by defining two transformation parameters, i.e. a crystallographical axis and an angle of rotation.

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Factors affecting farm operators’ interest in incorporating riparian buffers and forest farming practices in northeast and southeast Missouri

Interest in the incorporation of riparian buffers and forest farming were modeled following agricultural conservation and agroforestry adoption studies. Attitudes, individual characteristics, economic diversity of landowners’ household portfolio, and physical and ecological conditions were explanatory variables in Logit regression models of interest. Habitus and field, the values and institutions of farm operators, were included in the framework. Knowledge of the practice, perceived problems with the environment and attitude/habitus variables had a positive effect on the probability of being interested in riparian buffers. Knowledge of the practice was the most important factor in explaining interest in the case of forest farming, followed by attitudes about trees and concern for future generations, both habitus variables. Field variables like CRP payments representing familiarity with government programs that support conservation, had no significant effect on interest in riparian buffers. Older farmers were less interested in both practices, consistent with other findings. Existing economic diversification of the household portfolio had no effect on the probability of being interested in either practice.

How to foster good husbandry of private native forests

It is generally agreed that effective conservation requires the cooperation of private landholders to complement reserve-based efforts, but there is little agreement about how this can best be achieved. Various stakeholders lobby for tough regulations, for greater landholder freedom, and for incentives for activities or outcomes. A review of these alternatives suggests an emerging consensus that incentives are the most effective approach. Policy-makers should consider incentive-based approaches such as stewardship support to foster conservation outcomes on private lands.

Biomass expansion factors for Sitka spruce (<Emphasis Type="Italic">Picea sitchensis</Emphasis> (Bong.) Carr.) in Ireland

The assessment of a forest resource in national inventories provides a firm basis for the calculation of biomass and carbon (C) stocks of forests. Biomass expansion factors (BEFs) and conversion factors provide a robust and simple method of converting from forest tree stem volume to total forest biomass. These factors should be constructed on the basis of nationally specific data in order to take account of regional differences in growth rates, management practices, etc. The objective of this study is to improve the accuracy of biomass estimation by calculating a range of age-dependant BEFs from representative data that more accurately describe the allometry of present forests. The results from this study show that the allocation of biomass to compartments in forest stands and throughout a rotation varies considerably, and that the use of BEFs for the calculation of C stocks in forests of sub-timber dimensions is highly impractical.

Financial feasibility of using shelterbelts for swine odor mitigation

A farm-level financial feasibility was performed to examine the use of shelterbelts as a swine odor mitigation technology. Shelterbelts are purposefully planted rows of trees and shrubs around the main sources of swine odor—swine buildings, manure storage systems, and crop fields that receive land applied manure. By using a series of model pork finishing farms and a number of differing shelterbelt design scenarios, the shelterbelt establishment and long-term (20 years) maintenance costs were calculated using a discounted cash flow analysis. Total costs for examined pork finishing farms, depending upon the shelterbelt design scenario, and whether or not government cost-share programming was used, ranged from $0.01 to $0.65 per pig produced. Study results emphasized the importance of cost-share programs, particularly Environmental Quality Incentive Program (EQIP). In most cases, both with and without cost-share programming, the total costs were well below reported pork producer expenditures for odor management.

Climatic Drivers of Revegetation Management Practices in Australia: Analysis of a Social Survey

Investment in small and large-scale revegetation in Australia is growing in response to concerns regarding the sustainability and productivity of agricultural landscapes. Site preparation and management––such as soil cultivation, weed control, fertilising, mulching, use of treeguards and watering––are major costs associated with small-scale revegetation. The aim of this study has been to investigate local revegetation knowledge and practices to determine the usefulness of each management practice for achieving success and to determine whether some practices are more suited to particular climatic zones. A national online revegetation survey was conducted to ascertain current small-scale revegetation practices and the factors that drive these choices. Management practices were found to be strongly associated with climate. Mulch, fertiliser, weed control and watering were applied more frequently in higher rainfall and higher temperature zones. Soil cultivation and treeguards were used more frequently in lower rainfall and lower temperature zones. These findings suggest that there may be some benefit in modifying existing revegetation guidelines to reflect climatic zones and management flexibility.

Investment in Small-Scale Forestry Enterprises: A Strategic Perspective for India

Small and medium enterprises are a key driver of current double-digit industrial growth of India; however, the shrinking domestic log supply has created a unique market opportunity for global forest-based industries. This paper examines the major obstacles to investment in forests at the national and individual firm level and also the policy steps needed to overcome these obstacles. Forest-based small-scale enterprises cite finance as their principal constraint in maintaining their competitive position and developing their activities, with shortages of raw material often taking second place. India has extensive tracts of land suitable and available for forestry; afforestation, although economically viable, requires massive initial investment by both the government and private sectors. India is promoting public–private partnerships in order to increase forest cover to ensure entitlement for the investor over forest produce, along with necessary safeguards for protection of and compensation for the rights of village dwellers and communities, besides providing them additional benefits and livelihood. Governments need to tackle corruption and other forms of rent-seeking, in order to build credibility with firms, foster public trust and legitimacy and ensure their policy interventions are crafted to fit local conditions. Competition requires the Indian forest products industry to accomplish a strong improvement in its economic and technological capabilities. The challenge for forest policy-makers in India is to find the right mix of policies and incentives to attract private investment.

Adaptation to Change and Re-designing of Governance Systems: Cases from Small-Scale Rural Forestry

Changes in small-scale forest governance as a reaction to global changes are viewed from the system dynamics perspective, focused on two levels of dynamic systems: the policy system with sets of interactions at the national level and the management system at the local level. These interactions are considered through permanent adaptation and re-shaping of stakeholders’ networks and positions provoking further changes in the systems. Empirical evidence has been obtained from two case studies related to small-scale rural forestry in distinct contexts—France (the Territorial Forestry Charters) and Kyrgyzstan (collaborative forest management and leasing of forest plots)—and viewed through a theoretical framework of social-political systems dynamics. The changes caused by the systems’ capacity for adaptability and resilience are expressed through a double spiral of decision-making, characterising the interactions between national policies and local management practices. The analysis leads to a conclusion that changes are basically determined by the formal and informal stakeholders’ strategies developed in a specific context and their mutual adaptation aimed at system resilience.

Carbon inventory methods and carbon mitigation potentials of forests in Europe: a short review of recent progress

The role of European forests and forest management in the carbon balance has received much attention in research recently. This was particularly motivated by the recognition of forest management as one possible measure countries may adopt in the framework of the Kyoto Protocol to reduce the concentration of greenhouse gases in the earth’s atmosphere. The main method to assess carbon budget in forests is based on traditional forest inventories. This method requires the conversion of measured stem volume to carbon pools. This conversion has been identified as a large source of uncertainty in past assessments. Over the last 5 years, intensive research efforts have resulted in significant advances in the reliability of forest inventory based carbon budgets. In parallel, the impact of forest management on the carbon balance of forest ecosystems has been investigated and the carbon mitigation potential of these activities has been analysed. This paper reviews the progress that was made in these two fields of research with a particular focus on European forests.

Fracture of air-dried and fully saturated parallel strand lumber (PSL) under impact loading

The behaviour of air-dried and fully saturated parallel strand lumber (PSL) was determined under both static and impact loading. It was found that the moisture content had a significant effect on peak stress and deformation, stress rate, time to failure, and fracture energy. In addition, the results from this study were combined with those from previous studies in order to obtain a more general relationship between strength and stress rate for air-dried PSL.

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