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Everett, L. ,  Eta-Ndu, J.T. ,  Ndioro, M. ,  Walker, P. ,  [Combining ability among source populations for tropical midaltitude maize inbreds] ,  Combining ability among source populations for tropical midaltitude maize inbreds

Walker, P. ,  [Single site design considerations in onfarm experiments] ,  Single site design considerations in onfarm experiments

Mutsaers, H.J.W. ,  Walker, P. ,  [Farmers maize yields in S.W. Nigeria and the effect of variety and fertilizer: an analysis of variability in onfarm trials] ,  Farmers maize yields in S.W. Nigeria and the effect of variety and fertilizer: an analysis of variability in onfarm trials

Palada, M.C. ,  Walker, P. ,  Masajo, T.M. ,  Jalloh, M. ,  [An onfarm rice variety trial in toposequences of inland valley swamps] ,  An onfarm rice variety trial in toposequences of inland valley swamps

Mutsaers, H.J.W. ,  Adekunle, A. ,  Walker, P. ,  Palada, M.C. ,  [The maize and cassava production system in southwest Nigeria and the effect of improved technology; onfarm trials in Alabata and Ayepe, 1985-1989] ,  The maize and cassava production system in southwest Nigeria and the effect of improved technology; onfarm trials in Alabata and Ayepe, 1985-1989