Reactions and movement of organic chemicals in soil : proceedings of a symposium sponsored by Division S-1, S-2, S-3, S-9 ans A-5 of the Soil Science Society of America and the American Society of Agronomy in Atlanta, G.A., 30 nov. and 1 Dec. 1987 - Sawhney, B. L. (SSSA special publication ;, 1989)