Improving soil fertility in Africa    Proceedings 

 - Rome  F A O       1971 
 - 145p  cm. 
 - F A O soils Bulletin; 14 .
<br/><br/><label>Standard No.: </label>8,348 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>AGRICULTURE
<br/><br/><label>Dewey Class. No.: </label>J:1:6.6p1,N70, L1