?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=K+E&rft.au=Giller%2C+K+E&rft.aulast=Giller&rft.atitle=A+research+agenda+to+explore+the+role+of+conservation+agriculture+in+African+smallholder+farming+systems&rft.title=Field+Crops+Research&rft.issn=0378-4290&rft.date=2011&rft.volume=124&rft.pages=468-472&rft.issue=3&rft.genre=article