info:oai:icrisat:9941info:ofi/fmt:xml:xsd:journalMasvayaE NMasvaya, E NNyamangaraJNyamangara, JDescheemaekerKDescheemaeker, KGillerK EGiller, K ETillage, mulch and fertiliser impacts on soil nitrogen availability and maize production in semi-arid ZimbabweSoil and Tillage Research0167-1987May 2017168125-132article