A Systems approach to conservation tillage / 
edited by Frank M. D'Itri. 
 - Chelsea, Mich. :  Lewis Publishers,  c1985. 
 - xvii, 384 p. :  ill. 
<br/><br/><label>ISBN: </label>087371024X :  $39.95 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Conservation tillage.<br/>Conservation tillage--United States.
<br/><br/><label>Dewey Class. No.: </label>631.5/1�19