Crop productivity 

 - Oxford  Butterworth-Heinemann Ltd.  1994 
 - x,296p.  27cm 
 - Books in the biotol series .
<br/><br/><label>ISBN: </label>0750605626 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultural economics
<br/><br/><label>Dewey Class. No.: </label>338.16  / CRO