Proceeding on soil phosphorus 

 -  1965 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>52882 
<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(E151)p3,N62, K5