CAB Abstracts
http://www.cabi.org/cababstracts
CABI Full Text Repository

Bangla JOL (Bangladesh Journals Online)
http://www.banglajol.info/index.php/AGRIC

DOAJ (Directory of Open Access Journals)
http://www.doaj.org/openurl?genre=journal&issn=17295211

AGRICOLA (USDA National Agricultural Library)
  http://www.nal.usda.gov/nal-catalog/journals-indexed-agricola-jia

Scribd
http://scribd.com/

SSRN (Social Science Research Network)
http://www.ssrn.com/

CrossRef
http://www.crossref.org

DOI (Digital Object Identifier)
http://www.doi.org/

INASP (International Network for Availability of Scientific Publication)
http://www.inasp.info/

Google Scholar
http://scholar.google.com/