info:oai:icrisat:4780info:ofi/fmt:xml:xsd:journalRusinamhodziLRusinamhodzi, LCorbeelsMCorbeels, MWijkM T VanWijk, M T VanRufinoM CRufino, M CNyamangaraJNyamangara, JGillerK EGiller, K EA meta-analysis of long-term effects of conservation agriculture on maize grain yield under rain-fed conditionsAgronomy for Sustainable Development1774-0746201131657-6734article