info:oai:icrisat:4779info:ofi/fmt:xml:xsd:journalGillerK EGiller, K ECorbeelsMCorbeels, MNyamangaraJNyamangara, JTriompheBTriomphe, BAffholderFAffholder, FScopelEScopel, ETittonellPTittonell, PA research agenda to explore the role of conservation agriculture in African smallholder farming systemsField Crops Research0378-42902011124468-4723article