Unger, Paul W <br/><br/>
Tillag systems for soil and water sonservation / 
by Paul W. Unger; soil resources management and conservation service land and water development division FAO (Rome) 
 - Rome :  FAO,  1984 
 - xvi, 278 p. :  ill., plates, photos ;  30 cm. 
 - FAO soils bulletin ;  54 .
<br/><br/><label>ISBN: </label>9251021546 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soil conservation<br/>Water conservation<br/>Soil management<br/>Conservation tillage
<br/><br/><label>Dewey Class. No.: </label>631