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Comparative review of the effects of organic farming on biodiversity (OF0149) Полный текст
1998
Gardner, Sarah M. | Brown, R. W. | R & D Associates
This is the final report of Defra project OF0149 1. The report reviews the impact of different farming regimes and makes a comparative study of their influence on the biodiversity of arable farmland. 2. Within this review, the evaluation of impacts on biodiversity focuses on species and habitats, and includes both the number, abundance and activity of species (section 1.3). 3. Five farming regimes are defined and discussed, namely Conventional Arable, Conventional Mixed Lowland, Organic and two integrated production regimes - LEAF (Linking Environment and Farming) and IFS-Experimental regimes The main differences between the regimes in relation to the use of external inputs and other agricultural practices are discussed. The review draws on both UK and European information (section 1.4). 4. The effect of each farming regime on biodiversity is assessed according to the agricultural practices adopted and to the occurrence and management of uncropped land present. Agricultural practices are reviewed within the following categories: cultivation, crop production, crop protection and post-cropping practice (section 2.1). 5. Among the agricultural practices examined, those associated with crop protection and the artificial inputs associated with crop production were seen as the most adverse for biodiversity. Several practices were seen to benefit the biodiversity of arable land. These included set-aside, crop rotations with grass leys, spring sowing, permanent pasture, green manuring and intercropping (section 2.7). 6. Uncropped areas, such as sown grass strips (beetle banks), grass margins and conservation headlands, were seen as critical for the maintenance of biodiversity on arable farmland. Changes in the balance of cropped to uncropped land within some farming regimes, linked to increase in field size, have had a major impact on the diversity of flora and fauna associated with those regimes (section 3.4). 7. Based on the evaluation of agricultural practices used, the occurrence of uncropped land and the extent of the farming regime within England and Wales, it was concluded that Conventional Arable regimes act effectively to maintain the impoverished status of biodiversity on arable land. Extreme examples can be found of intensively managed farms that further deplete biodiversity and sympathetically managed farms that try to enhance it. Increased adoption of agricultural practices such as direct drilling, use of farmyard manure, set-aside, use of crop rotations with leys, or an increase in the incidence and sympathetic management of uncropped areas may well assist biodiversity on farms within this regime (sections 4.3 & 4.4) 8. Organic regimes were shown to have an overall benefit for biodiversity at the farm level, both in terms of the agricultural practices adopted and in the occurrence and management of uncropped areas (sections 4.3 & 4.4). 9. Conventional Mixed Lowland and LEAF regimes were both seen to have the potential for enhancing biodiversity on arable land. Here, adverse impacts associated with crop protection and crop production may be mitigated by beneficial effects associated with post-cropping practices, the occurrence of permanent pasture and uncropped land. At present, the extent to which enhancement may be achieved, may well depend on the extent, condition and management of uncropped land present within these regimes (sections 4.3 & 4.4). 10. IFS-experimental regimes were seen to have a beneficial effect on biodiversity, due to the stringent procedures used for targeting herbicides and pesticides and for establishing and managing uncropped areas. At present these regimes occupy a tiny area of the national resource of arable land and thus their impact on national biodiversity is likely to be insignificant at the present time (sections 4.3 & 4.4). 11. A number of areas are highlighted for further consideration. These include: • monitoring of biodiversity on farms pre- and post- conversion to organic farming, • comparative studies that focus on the effectiveness of different regimes or agricultural practices in enhancing biodiversity on species-impoverished intensively managed arable land, • manipulative experiments to determine the optimal balance of cropped to uncropped areas for enhancing biodiversity, • manipulative experiments to examine the separate impacts of rotational regimes and agricultural inputs on biodiversity, • an economic assessment of the costs and benefits in both production and biodiversity terms, of conversion to organic, integrated production or uptake of available agri-environment schemes.
Показать больше [+] Меньше [-]Alternatives to Slash and Burn in Indonesia: summary report & synthesis of phase II Полный текст
1998
.t.p tomich
.T.P Tomich, 'Alternatives to Slash and Burn in Indonesia: summary report & synthesis of phase II', p.140, 1998 | Conversion of tropical forests reduces biodiversity and releases stored carbon. Although a part of tropical deforestation resulting from slash-and-burn is linked to poverty of people living at the forest margins, the conditions necessary for increased productivity of agroforestry and other land use systems to reduce poverty and reduce deforestation are not well understood. The key hypothesis underlying Phase II of the ASB research project in Indonesia can be summarized as: Intensifying land use as an alternative to slash-and-burn simultaneously can reduce deforestation and reduce poverty. This research problem was identified at the conclusion of Phase I of the project and has remained the focus of research through Phase II. The research programme in Phase II was designed to better understand how the Government of Indonesia and donor agencies could balance global environmental objectives with economic development and poverty reduction. While conversion of primary forest has the major effect on biodiversity and carbon stocks, the resulting land uses also matter a great deal for the supply of these global public goods. Measurement of differences among environmental consequences of the various land uses provides the basis for quantifying major tradeoffs involved in land use change
Показать больше [+] Меньше [-]Ecology and management of tropical secondary forest: science, people and policy: proceedings of a conference held at CATIE, Costa Rica, November 10-12, 1997 Полный текст
1998
Guariguata, Manuel R. | Finegan, B.
The disturbance and destruction of the old-growth forests of the tropics continue to monopolize attention in international fora and the popular media, but a steadily growing land area is covered by secondary forest developing on sites which have been deforested and then abandoned by their owners. The natural process of secondary forest succession offers hope that the unique combination of goods and services provided by the original old-growth forests may be at least partially recovered. An enormous number of questions concerning secondary tropical forests and their potential role in sustainable land management and biodiversity conservation remain to be answered, however. Many of these questions are biological and ecological: What are the factors that bring about successional change in vegetation? How does biodiversity change during succession, does its similarity to the biodiversity of old-growth forests increase over time and why, or why not? How might secondary forests be manipulated to optimize their value for a given set of management objectives? Many more questions nevertheless concern people and their actions: what factors bring about land abandonment? How are secondary forests perceived and utilized by rural people? What market or policy changes may contribute to a more profitable and sustainable use of secondary forests? This volume contains 16 papers presented at a conference which brought together researchers concerned with biological, ecological, social/organizational, financial/economic and political aspects of secondary forests and their management with a strictly neo tropical focus. Although the biophysical side of secondary forest research dominated this conference, it is becoming clear that sound management of this resource will depend on interdisciplinary approaches.
Показать больше [+] Меньше [-]Ecology and management of tropical secondary forest: science, people and policy: proceedings of a conference held at CATIE, Costa Rica, November 10-12, 1997 Полный текст
1998
eds | m.r. guariguata | b. finegan
Ecology and management of tropical secondary forest: science, people and policy: proceedings of a conference held at CATIE, Costa Rica, November 10-12, 1997 Полный текст
1998
eds | m.r. guariguata | b. finegan
The disturbance and destruction of the old-growth forests of the tropics continue to monopolize attention in international fora and the popular media, but a steadily growing land area is covered by secondary forest developing on sites which have been deforested and then abandoned by their owners. The natural process of secondary forest succession offers hope that the unique combination of goods and services provided by the original old-growth forests may be at least partially recovered. An enormous number of questions concerning secondary tropical forests and their potential role in sustainable land management and biodiversity conservation remain to be answered, however. Many of these questions are biological and ecological: What are the factors that bring about successional change in vegetation? How does biodiversity change during succession, does its similarity to the biodiversity of old-growth forests increase over time and why, or why not? How might secondary forests be manipulated to optimize their value for a given set of management objectives? Many more questions nevertheless concern people and their actions: what factors bring about land abandonment? How are secondary forests perceived and utilized by rural people? What market or policy changes may contribute to a more profitable and sustainable use of secondary forests? This volume contains 16 papers presented at a conference which brought together researchers concerned with biological, ecological, social/organizational, financial/economic and political aspects of secondary forests and their management with a strictly neo tropical focus. Although the biophysical side of secondary forest research dominated this conference, it is becoming clear that sound management of this resource will depend on interdisciplinary approaches | M.R. Guariguata, B. Finegan, eds, 'Ecology and management of tropical secondary forest: science, people and policy: proceedings of a conference held at CATIE, Costa Rica, November 10-12, 1997', Serie Tecnica. Reuniones Tecnicas/CATIE no. 4, CATIE, IUFRO, CIFOR, WWF, GTZ, Turrialba, Costa Rica, 1998
Показать больше [+] Меньше [-]Forest soils under Alternatives to Slash-and-Burn agriculture in Sumatra, Indonesia Полный текст
1998
noordwijk.m van
Noordwijk.M Van, 'Forest soils under Alternatives to Slash-and-Burn agriculture in Sumatra, Indonesia', pp.175-185, 1998 | A global project on `Alternatives to Slash and Burn' agriculture was initiated by a consortium of international and national research institutes to facilitate intensification of the use of converted forest land, in order to help alleviate poverty and protect the remaining forest areas for their biodiversity values and their role in mitigating greenhouse gas emissions. Data for the Indonesian benchmark areas in the lowland peneplain, piedmont and mountain zone of Sumatra are presented. A significant amount of forest land, especially in the lowland peneplain, has been converted in the last ten years into agricultural use, usually following logging concessions. Soils on the peneplain are poor (oxi-and ultisols) and current intensive crop based production systems are not sustainable. In the piedmont zone on better soils (inceptisols), rubber agroforests (still) characterize the area. Agroforests have emerged during the 20th century as the major alternative to slash-and-burn agriculture, based on a shift of emphasis from food crops to cash-earning tree crops. Emphasis on food crops, however continues in government resettlement schemes. Differences in organic C content of the topsoil between forests and crop land are about 0.5% C, with agroforests and tree crop plantations in an intermediate position. A new size-density fractionation scheme for soil organic matter demonstrated larger changes in light and intermediate fractions. Forest soils can be significant sinks for methane and thus partly compensate for the methane emissions in lowland rice production. Overall, the Sumatra benchmark areas demonstrate the need to combine intensification of land use at the field/household level with effective protection of remaining forest areas at the community level and reducing other driving forces of deforestation at the national level
Показать больше [+] Меньше [-]Mountain pastureland milieux. The multiple usefulness of these milieux managed by domestic grazing | Milieux pâturés d'altitude. Intérêts multiples de ces milieux gérés par le pâturage domestique Полный текст
1998
BORNARD, A. | Cozic, P.
Au-delà de l'intérêt pastoral qu'ils représentent, les milieux pâturés d'altitude ont une capacité à remplir des fonctions multiples. Intérêt pastoral : les productions animales enregistrées sur les principaux types de pâturages d'altitude à génisses, à vaches laitières, à ovins viande, sont d'un niveau intéressant tant en quantité qu'en qualité. Multifonctionnalité : contribution à la biodiversité végétale, maintien d'un espace ouvert participant à la qualité paysagère et générant des complémentarités avec l'activité touristique et la faune sauvage, rôle de protection contre certains risques naturels. | Beyond the use as grazing land that they represent, grazed milieux in the mountains have the capacity to fulfil a multiplicity of functions. Uses as grazing: animal production recorded on the main types of mountain pasture, for heifers, dairy cows and sheep bred for meat are at an interesting level both in quantity and in quality. Multifunctional: contribution to plant biodiversity, maintenance of an open space which contributes to landscape quality and generates additional use with tourism and wildlife, and a protective role against particular natural risks.
Показать больше [+] Меньше [-]Forests in Sustainable Development: guidelines for forest sector development cooperation Полный текст
1998
Paper defines a strategy for forest sector development, and translates it for practical application. In response to the causes of deforestation and desertification, which are rooted in a complex web of socio-economic factors (both inside and, mainly, outside the forests) these guidelines are centred on the needs of people living in and making a living from forests. Sustainable forest management is based on economic, environmental, social and cultural criteria and indicators. Forest programmes and projects will not be sustainable if they do not, for example, consider the broader pattern of land use, address questions of land tenure and access to land, find a balance between economic needs and conservation of biodiversity and give maximum responsibility and benefits to those who live in and make a living from the forests. These objectives cannot be achieved without supporting developing countries in the creation of the necessary policy, legal and institutional environment. In support of this approach, the guidelines contain some newly-conceived and innovative elements. With regard to the social aspect of sustainability, a consistent module for Social Impact Analysis is available. The Commission is now among the first donors to provide a complete tool box for impact analysis, together with the updated guidelines for Environmental Appraisal in the forest sector (contained in these guidelines) and the manual on Financial and Economic Analysis of projects.Part I outlines, for a wide audience, the strategic approach of the European Community to Forest Sector Development Co-operation by setting the scene, introducing general principles valid for all types of interventions and defining themes for support to developing countries. It is accompanied by a diskette providing checklists and working materials for use by target groups.Part II addresses the needs of those dealing directly with EC forest programmes and projects. It provides checklists and support material within a three-dimensional matrix, combining thematic areas with the phases in the Project Cycle and selected factors for sustainability. The final parts of Volume II provide standardised Terms of Reference for different studies and detailed guides for Environmental Appraisal, including Environmental Impact Assessment (EIA), and Social Impact Analysis (SIA).[author]
Показать больше [+] Меньше [-]CIFOR’s testing on a minimum set of criteria and indicators in PT INHUTANI II, Stagen, Pulau Laut, South Kalimanta, Indonesia. Полный текст
1998
Purnadjaja | Indrawan, A. | Siregar, C.A. | Muhtaman, D.R. | Purwanto, S.A. | Warsito, S.P. | Darma, I.G.K.T
Critical increase of world population growth has revealed significant consequences in terms of food and wood needs for people on the globe. This alarming phenomenon inevitably gave rise to major changes on land use form or natural vegetation covered the earth surface due to the population pressure occured on readily available natural resources such as tropical rain forest. In order to fulfill the basic needs of food and wood through agricultural cultivation in one hand and to ease degradation rate of natural forest on the other hand, forest plantation have been established in many countries included Indonesia during the last two decades. Owing to the fact mentioned before, up to date, plantation forest has been an important land use system especially in the tropical area. For example Indonesian goverment has projected to establish 6.2 million hectares of industrial forest plantation by the year 2000. In so far as ecological aspect is considered, that plantation forest are expected to play the important role of the productive and protective functions of the natural forest. However, some industrial forest plantations have been reported as an alternative technology causing not only environmental problems through reduction in species biodiversity, soil erosion, water pollution and stream bed sedimentation, but also socio-economical problems such as low market price due to over production, and conflicts between villagers and forest concession holder. To cope up with the overall adversed effects may rise from the plantation forest project, sustainable forest management has been espoused as the key tool by scientists from many countries all over the world. This sustainable forest management concept is therefore designed to ensure that the establishment of industrial forest plantation satisfy economic, ecology and social functions as compared to natural forests. In turn, to examine whether the sustainable forest management practices is still on the right tract with overall objectives, a comprehensive method of evaluation is needed. Currently, the concept of principles, criteria and indicator (P, C&I) has been developed in the forest sector as a method or guidelines to determine and evaluate sustainable forest management a the international, national and forest management unit level. Since its existence, Criteria and Indicator (C&I) have been developed by many institutions. For example, ITTO comes up with principles of sustainable forest management (SFM); WWF develops guidelines; FSC introduces general Principle, Criteria and Indicators; Smart Wood Program of Rainforest Alliance introduces its C&I; Lembaga Ekolabel Indonesia (LEI) also develops C&I for production forest. These variety of C&I can be applied at various levels: global, regional (eco-regional), national, and sub-national or at Forest Management Unit (FMU) level. However, one source of C&I is not necessarily applicable at all local/FMU level. Due to the significance of socio-economic and ecology are variable across the whole countries and forest management unit as well, the guidelines consisting P, C&I are unlikely final. In other words, set of P, C&I for use at any level is supposed to be developed to assess the quality of management and ecosystem in question in a way toward the achievement of sustainable goal. Therefore, CIFOR through project " Testing Criteria and Indicators for Sustainable Forest Management" has been trying to search C&I that fits with particular FMU, in this case, in Indonesia. The similar test also will be conducted in Brazil and Coté d'Ivore. The final findings of C&I are expected to generate a minimum number of cost effective and reliable C&I for each test site, based on iterative and comparative field evaluation of selected sets
Показать больше [+] Меньше [-]Agricultural development with rainforest conservation: methods for seeking best alternatives to slash-and-burn, with applications to Brazil and Indonesia Полный текст
1998
j.p tomich
J.P Tomich, 'Agricultural development with rainforest conservation: methods for seeking best alternatives to slash-and-burn, with applications to Brazil and Indonesia', vol. 19(1-2), pp.159-174, 1998 | Forests continue to fall for agricultural purposes throughout the humid tropics, with immediate and potentially large consequences for climate change and biodiversity lossâ??issues of key interest to the international community. Some of the actors directly responsible for forest conversion fell trees to meet food security needs and alleviate poverty â?? issues of urgent interest to them and also to national policymakers. This multiplicity of groups with differing (often conflicting) interests in the multifarious goods and services produced by tropical forests complicates the search for alternative agricultural activities for forest margins since these alternatives must satisfy such divergent objectives. This paper sets out a conceptual framework for comparing the impacts of different land use systems and agricultural practices at the margins of tropical rainforests in terms of the concerns and objectives of two key interest groups: small-scale farmers seeking livelihoods at the forest margins and the 'international' interests in the global public goods and services supplied by tropicalrainforests. This framework should be useful to a third key group, the national and regional policymakers who must consider these and other policy objectives and then decide on courses of action. The paper identifies data needs and analytical methods capable of supplying an empirical base for this conceptual framework, based on quantifiable indicators. It then presents preliminary results of the application of this conceptual framework in Indonesia and Brazil in association with a global, collaborative, multidisciplinary research program. Even using preliminary order-of-magnitude estimates (to be replaced by more precisemeasurements as they become available), this conceptual framework presents results in ways that allow researchers and policymakers to select clear 'best bets' for development, when they exist, and to assess tradeoffs and options for complementary policy action and research efforts, when they do not.  1998 Elsevier Science B.V. All rights reserved
Показать больше [+] Меньше [-]Papers presented at the New Zealand Agricultural and Resource Economics Society (Inc.) Fifth Annual Conference : "Public - v - private interests : the role of the state in agriculture" : incorporating the 23rd Annual Conference of the New Zealand Branch of the Australian Agricultural and Resource Economics Society (Inc.) : Blenheim Country Lodge, July 1998 Полный текст
1998
Agribusiness
Published on behalf of the New Zealand Agricultural and Resource Economics Society (Inc.) | The fifth annual conference of the New Zealand Agricultural and Resource Economics Society covers the policy and legislation changes relative to agriculture and resource use, as well as the impact of broader policy changes. The conference also covers the debate on the producer boards. This discussion paper includes full text of the following papers: Malcolm Bailey, The Impact of Government Legislation on The Agricultural Sector; Sean Devine, Is The MoRST/FRST/CRI Model Delivering; Roger Kerr, Moving Beyond Producer Boards; Chris Ward and Murray Doak, The Great 1998 Drought; J. Alam, Impact of Recent Economic Reforms on Agriculture: The Bangladesh Experience; R. Arnor, C. Gan and H. Bigsby, The Application Of Planning Legislation: The RMA and Forestry; T. Parminter and I. Tarbotton, An Exploratory Study On The Relative Weightings Being Put Upon Environmental Outcomes By Waikato Farmers; G. Rauniyar and W. Parker, Adoption Of Environmentally Beneficial Land Management Practices - Evidence From NZ Pastoral Farms; D. Kuiper, S. Morriss, J. Reid, Extension Science and Sustainable Land Management Policy; N. Lambie and K. Bickmell, A Dynamic Microeconomic Analysis of Bovine TB Movement Control Policy; Alan McDermott and Nicola Shadbolt, Strategic Alliances For Competitive Viability In Lamb Production Systems ¬Impact Upon Risks and Returns; G.S. Alley, N. M. Shadbolt and T. T. Kingi, The Application Of Strategic Planning and Management In a Maori Incorporation: A Case Study; W. Parker, et al, Adoption of Technology and Information on New Zealand Dairy Farms; G. Rauniyar, C.R. Upreti, R. Gavigan and W. Parker, Constraints to Sheep Farming In Nepal; Phil Journeaux, Agricultural Extension In New Zealand - Public vs Private Good; Irene Parminter, Regional Costs and Benefits of Government Interventions: The RMA and Farm Dairy Effluent Control; Ian Cairns and Victor Walker, This is What Policy is all about! Meat Act Experience; Brian Bell, Queuing For Sanitary and Phytosanitary Import Requests: Can Political Interference and Bureaucratic Delays Be Removed?; R. Cullen, G.Fairburn and K. Hughey, COPY: a New Technique for Evaluation of Biodiversity Protection Programmes; R. Alexander and D. Shields, The Economics of Endangered Species: The Case of the African Elephant; R. Wilkinson, P. Jarvis and T. van der Lem, NZ Farmers Costs of Compliance With Legislation; Rod Forbes, The EI Nino Weather Pattern and Pastoral Supply Response Forecasting; J. Prasad and R. SriRamaratnam , New Zealand Apple Supply Responses by Region and Varieties; Ralph Lattimore, Exploring the Behaviour of the Real Exchange Rate; A. Rae, C. Nixon and P. Gardiner, Foot-and-Mouth Disease and Trade Restrictions: Latin American Access to Pacific Rim Beef Markets; W. Parker and A. Dooley, Student Experiences as Farm Employees During Their Programme Practicum; E. Cameron, D. Kuiper, E. Kemp and S. Morriss, ENZA's Integrated Fruit Production Programme and Apple Growers Decision Making; W. Parker, A. Dooley and R. MacLaren, Farmer Knowledge and Perceptions Concerning Farm Forestry: A Wairarapa Study; Robin Johnson, Technical Requirements of Agriculture, Science and Policy; D. Marsh, Evaluating Science Outcomes in New Zealand: A Review; S. Bohorova and F. Scrimgeour, Royalty Allocation for Capturing The Value Of Genetic Improvement¬ The Case of the Commercial Forest Industry; V. Plata and G. Nartea, Credit Analysis Procedures of Rural Lenders in Canterbury; G. Rauniyar, W. Parker and A. Dooley, Trends in Dairy Farm Sales and Factors Influencing Dairy Land Prices in New Zealand (1990 -1997).
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