Cooke, G. W.  <br/><br/>
The role and importance of potassium in the agricultural systems of the humid tropics   the way forward 

 - Bern  International Potash Institute  1986 
 - 39p.  21cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soil sciences<br/>Soil chemistry
<br/><br/><label>Dewey Class. No.: </label>631.41  / COO