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This reader is a follow-up to that workshop. It is a collection of papers on the theme of assessing sustainability in agriculture. The collection is divided into four parts. Following an introductory theme paper (Part I), the papers in Part II discuss the conceptual framework for assessment. Part III examines specific methodological issues, with the emphasis on farmers' assessment criteria. Part IV contains case studies comparing the performance of environmentally friendly farming practices and systems with that of conventional (high-external-input) agriculture.