info:oai:icrisat:3159info:ofi/fmt:xml:xsd:bookRusinamhodziLRusinamhodzi, LCorbeelsMCorbeels, MWijkM T VanWijk, M T VanNyamangaraJNyamangara, JGillerK EGiller, K E2011Effects of Conservation Agriculture and manure application on maize grain yield and soil organic carbon: a comparative analysisproceeding