TY - BOOK AU - Troeh,Frederick R. AU - Hobbs,J.Arthur AU - Donahue,Roy Luther TI - Soil and water conservation: for productivity and environmental protection SN - 0130968072 (alk. paper) AV - S623 .T76 2004 U1 - 631.45 21 PY - 2004/// CY - Upper Saddle River, N.J. PB - Pearson/Education, Prentice Hall KW - Soil conservation KW - Water conservation N1 - Includes bibliographical references and index ER -