Applications of Systems Approaches at the Field Level: Volume 2: Proceedings of the Second International Symposium on Systems Approaches for Agricultural Development, held at IRRI, Los Banos, Philippines, 6-8 December 1995 by P.K. Aggarwal, B.A.M Bouman, H.H. Van Laar, John W. Jones, M.J. Kropff, P.S. Teng, Johan Bouma (Hardcover, 1997)