"Key technologies" is an umbrella term for appropriate technologies applied to give maximum economic benefit in particular circumstances that may cross traditional disciplinary boundaries. Development of the concept is necessitated by the rate of change of technological development. Key technologies may be classified in three groups related to…

The papers in this volume are concerned with rural development, with emphasis on the problems of low-income groups. Stephen McDonald explores economic factors in farm outmigration. Virgil Christian, Jr. and Adamantios Pepelasis discuss the extent and importance of economies of size in agriculture. Thomas Till analyzes the nature and extent of…