Sustainable agriculture systems / edited by J.L. Hatfield, D.L. Karlen. Hatfield, Jerry L. Karlen, D. L. (Douglas L.) Sustainable agriculture. Agricultural systems. Agricultural ecology. S494.5.S86 S86 1994 630 20 SUS Includes bibliographical references and index. Boca Raton : Lewis Publishers, c1994. c1994. 1994 Text 316 p. : eng