Farmers maize yields in S.W. Nigeria and the effect of variety and fertilizer: an analysis of variability in onfarm trials

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dc.creatorMutsaers, H.J.W.
dc.creatorWalker, P.
dc.date1990-06
dc.date2019-06-25T17:09:13Z
dc.date2019-06-25T17:09:13Z
dc.date.accessioned2026-06-27T15:57:42Z
dc.descriptionFarmer-managed trials in developing countries often show great variability in yield and treatment effects. The use of statistical techniques is demonstrated to explain this variability in a maize + cassava intercropping trial in southwestern Nigeria. Concomitant variables, measured in the trial fields, are used as covariates in the ANOVA and as regressors in the analysis of mean site yield. It was found that a new maize variety (TZSR-W) performed better than the lcoal irrespective of farmers' yield level. Fertilizer effect increased as farmers' overall yield level (reflected in their mean site yield) increased. At current fertilizer and maize prices, fertilizer was profitable for all except the poorest-yielding fields. Variation in yield level was partly explained by degree of shade and stand losses during the season. Part of the stand losses was due to termites. The majority of female farmers in the sample had lower yields than males because of a combination of factors such as shade, late planting, poor weeding and longer occupation of the land.
dc.identifierhttps://hdl.handle.net/10568/101828
dc.identifier.urihttp://hdl.handle.net/123456789/118615
dc.languageen
dc.publisherElsevier
dc.rightsLimited Access
dc.sourceMutsaers, H.J.W. & Walker, P. (1990). Farmers' maize yields in SW Nigeria and the effect of variety and fertilizer: an analysis of variability in on-farm trials. Field Crops Research, 23(3-4), 265-278.
dc.subjectmaize
dc.subjectcrop yield
dc.subjectnigeria
dc.subjectvarieties
dc.subjectfertilizers
dc.subjecton-farm research
dc.subjectintercropping
dc.titleFarmers maize yields in S.W. Nigeria and the effect of variety and fertilizer: an analysis of variability in onfarm trials
dc.typeJournal Article

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Instituto Internacional de Agricultura Tropical (IITA)