Proceeding on soil organic matter studious 

 -  1977 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>52883 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Soil<br/>Agriculture
<br/><br/><label>Dewey Class. No.: </label>J:1(E5)p1,N76, L7.1