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Rusinamhodzi, L and Corbeels, M and Wijk, M T Van and Rufino, M C and Nyamangara, J and Giller, K E (2011) A meta-analysis of long-term effects of conservation agriculture on maize grain yield under rain-fed conditions. Agronomy for Sustainable Development, 31 (4). pp. 657-673. ISSN 1774-0746