00832nam a2200289 4500 3516496 000 20150615144006.0 000 000 95191346 0713473533 UOEL DLC S623 .H78 1995 631.4/5 20 Hudson, Norman. Soil conservation / Norman Hudson. Fully rev. and updated, 3rd ed. Ames : Iowa State University Press, 1995. 391 p. : ill., maps ; 22 cm. Includes bibliographical references and index. Soil conservation. Soil erosion. 7 cbc orignew 2 ncip 19 y-gencatlg lcc LL 10219 10219