Kaddar T.  <br/><br/>
The vital role of potassium fertilizers in tropical agriculture : the present position, furure postential. and constraints to progress/  
T. Kaddar  
 - Estados Unidos de América :   International Fertilizar Development Center  
 - 14 p.  
<br/><br/><label>Subjects--Topical Terms: </label><br/>AGRICULTURA TROPICAL <br/>ABONOS DE POTASIO <br/>SUELOS ACIDOS 
<br/><br/><label>Dewey Class. No.: </label>FOLLETO 0545