Journal of sustainable agriculture and the environment 

 - Umudike  Micheal Okpara university of Agriculture,Umudike 
 - 2012  2012 
 - 12(2),2010;13(1),2012 
<br/><br/><label>ISSN: </label>1119-8152 
<br/><br/><label>LC Class. No.: </label>S1  / J68