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PROCEEDINGS OF THE VALIDATION FORUM ON |
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Strategic Environmental Assessment An Assessment of the Impact of Cassava Volume 5 |
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FOOD AND AGRICULTURE ORGANIZATION OF THE UNITED NATIONS
INTERNATIONAL FUND FOR AGRICULTURAL DEVELOPMENT Rome, 2001 |
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Cover photo bottom left: Grated cassava roots prior to fermentation
Cover photo center: The cassava plant
Cover photo right: Graph showing trends in cassava production
Reprinted 2004
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The designations employed and the presentation of material in this information product do not imply the expression of any opinion whatsoever on the part of the Food and Agriculture Organization of the United Nations or the International Fund for Agricultural Development concerning the legal or development status of any country, territory, city or area or of its authorities, or concerning the delimitation of its frontiers or boundaries. |
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© FAO AND IFAD 2001
STRATEGIC ENVIRONMENTAL ASSESSMENT
Cassava production and the environment
Cassava production and biodiversity
Cassava processing and the environment
Conclusions and recommendations
IMPACT OF CASSAVA PRODUCTION ON THE ENVIRONMENT
Cassava in Africa, Asia, Latin America and the Caribbean
Production environmentsOn-site effects of cassava cultivation on soil fertility
Nutrient removal in the crop harvest
Yield trends with and without fertilizer application
Nutrient balances
On-site effects of cassava cultivation and soil erosion on the environment
Comparison of cassava to other crops
Crop (C) factor in the Universal Soil Loss Equation
Other factors determining soil loss by water erosion
Nutrient losses in eroded sediments and runoff
On-site effect of erosion on productivity
Off-site effects of cassava cultivation and soil erosion on the environment
Effect of cassava cultivation on quality of water resources
Effect of eroded sediments on soil and water resources
EXISTING CASSAVA PRODUCTION/ENVIRONMENT KNOWLEDGE BASE
Technologies and crop/soil management systems
Crop/soil management to prevent nutrient depletion
Measures to reduce erosionEnhancing the adoption of soil-conserving practices by farmers
Gaps in knowledge
Conclusions and recommendations
EFFECT OF CASSAVA PRODUCTION ON BIODIVERSITY
Impact on the biodiversity of other native species
Impact on Manihot biodiversitySpecies inventory and ecogeography
Effect of cassava production
Effect of cassava breeding
Rationale for the conservation of wild Manihot
Blueprint for the long-term conservation of wild ManihotEffect of breeding on the biodiversity of cassava
Conclusions and recommendations
IMPACT OF CASSAVA PROCESSING ON THE ENVIRONMENT
Introduction
Areas and productsGeneral background
Water use and quality
Wash water and effluents
Solid wastes
Visual impacts
Chemical use
Atmospheric pollution
Effect of cassava processing on forest resources
EXISTING CASSAVA PROCESSING/ENVIRONMENT KNOWLEDGE BASE
Currently available technologies to control pollution
Dealing with a waste situation
Treatment technologies for wastes from processing
Biological treatment of waste water
Value-adding of waste products
Prevention
RECOMMENDATIONS FOR PLANNERS AND POLICYMAKERS
Appendix 1. Edapho-climatic classification of cassava production for Africa, Asia and Latin-America and Caribbean.
Appendix 2. Results of erosion experiments conducted with various crops and cropping systems in four Experiment Stations in Sao Paulo, Brazil from 1993 to 1999.
Appendix 3. Water quality standards.
I. Increasing the Productivity and Sustainability of Cassava by Better Soil/Crop Management
Improved nutrient management will increase yields - now and in the future
Integrated crop/soil management will increase yields and reduce erosionChoosing a site location
Choosing a technologyChoosing a site location
Choosing a technology
Conserving water
Dealing with wash water
Dealing with solid waste
Dealing with cyanide
Dealing with dust
Management measures