Unger, Paul W. <br/><br/>
Predicting tillage effects on soil physical properties and processes  : proceedings of a symposium... 

 - Madison, Wis. :  ASA,  1982 
 - 198 p.  : ilus. ; gráfs. 
 - Special publication  ; 44 .
 - Special publication  ; 44 .
<br/><br/><label>LCCN: </label>58291 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Labranza--Efecto en suelos<br/>Suelos--Física de.
<br/><br/><label>Dewey Class. No.: </label>631.51  / U5