Explanation of crop management, trial layout and data collection. 

 - [s.l]. :    IITA ,    [n.d]. 
 - v. ;    28 cm. 
 - Recommendations for cowpea international trial ;    no.496, Loc.23 .
<br/><br/><label>Subjects--Topical Terms: </label><br/> Crops.
<br/><br/><label>Dewey Class. No.: </label>354.54