Agroecosystem research for rural development : selected papers presented at the Third SUAN Regional Symposium on Agroecosystem Research, Chiang Mai, Thailand, 22-24 October, 1986 - SUAN Regional Symposium on Agroecosystem Research; Kanok Rerkasem; Rambo, A. Terry; Rongrus Jiranunkrom; Zosima Lameyra; Southeast Asian Universities Agroecosystem Network (Multiple Cropping Centre, Chiang Mai University, 1988)