02 Contents Frame
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40 2019 ND-CP 413905
- Điều hướng trang này:
- 2. Historical development 5
- 3. Expansion of concepts and definitions 13
- 4. Revised principles and procedures 29 Extended and additional principles 29 iv
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Contents Preface vi Acknowledgements vii Acronyms and abbreviations ix Executive summary xiii 1. The need for revision 1 Origins and applications of the framework for land evaluation 1 The objectives of land evaluation 1 An expanded definition of land and land resources 2 Trends calling for revision of the framework 2 Objectives and scope of this document 4 Outline of this document 4 2. Historical development 5 Land evaluation and classification before the framework 5 Origin and nature of the framework 6 Origin 6 Six principles 6 Concepts and procedures 7 Land evaluation systems originating since the framework 8 Soil survey and crop yield interpretations 8 Agro-ecological zoning 9 Combination of land evaluation and farming systems analysis 9 Computerized land evaluation systems and geographic information systems 10 Land evaluation using earth observation 12 The challenge for the future 12 3. Expansion of concepts and definitions 13 Functions of the land and limiting factors 13 Functions of the land 13 Limiting factors (limitations) 15 Concepts and definitions 18 Environmental concerns 18 Agro-ecosystems analysis and landscape value 18 Sustainable livelihood 23 Stakeholder participation 24 Cross-sectoral approach 25 Qualitative or quantitative and physical or economic evaluation 26 Decision-making levels and scales 26 Links with basic concepts of land evaluation 27 4. Revised principles and procedures 29 Extended and additional principles 29 iv Land suitability in terms of use and services of the land 30 Comparison of benefits obtained and inputs needed 30 Multi-disciplinarity and cross-sectoral analysis 31 Context and environmental concerns 31 Sustainability includes productivity, social equity and environmental aspects 31 Comparison of different land uses and services 31 Land evaluation should consider all stakeholders 32 Scale and level of decision-making 32 Outline of procedures 32 i. Initial consultation with all stakeholders 34 ii. Diagnosis of land use problems 34 iii. The identification of kinds of land use (land utilization types) 34 iv. Land use requirements, functions and limitations 35 v-vi. Description of land mapping units and land qualities 35 vii. Economic and social analysis 36 viii. Comparison of land use with land 37 ix-x. Agronomic and biophysical research programme 37 xi. Land suitability classification 38 xii. Presentation of results 38 tải về 0.57 Mb. Chia sẻ với bạn bè của bạn:
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