AGROECOSYSTEM ANALYSIS GORDON R CONWAY ICCET SERIES E No 1 1983 Centre for Environmental Technology and Department of Pure and Applied Biology, Imperial College of Science and Technology, London, SW7 ILU, United Kingdom Imperial College Centre for Environmental Technology Series E "The Dynamics of Environmental Systems" Rep irts in this serie are working papers and are intended for discussion purposes only. This report does not contribute a formal publication and should not be quoted without permission of the author. This report has been submitted for publication in Agricultural Ecosystems Environment Imperial College Centre for Environmental Technology Imperial College of Science and Technology 48 Prince's Gardens London SW7 ILU 83-E-1 -,I-