The gap between present farm yield and the potential  : major contraints and possible solutions 

 - Algiers :  Ministerie de l' Agriculture et de la Revolution Agraire,  [1980?] 
 - v. 
<br/><br/> La biblioteca tiene : v.2 
<br/><br/><label>LCCN: </label>70073 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cereales.<br/>Cereales--Malas hierbas.<br/>Fertilizantes para cereales.
<br/><br/><label>Dewey Class. No.: </label>633.1096  / C4 1979