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dc.contributor.authorOsiname, O.
dc.contributor.authorMeppe, F.
dc.contributor.authorEverett, L.
dc.identifier.citationOsiname, O., Meppe, F. & Everett, L. (2000). Response of maize (Zea mays) to phosphorus application on basaltic soils in Northwestern Cameroon. Nutrient Cycling in Agroecosystems, 56(3), 209-217.
dc.description.abstractA field trial was conducted on two P sorptive, basaltic soils commonly used for maize production in Northwestern Cameroon. The objective was to determine the maintenance P rates required for adequate P supply in the soils for maize after initial capital dressing applications of P (0, 22, 44, 88 and 132 kg ha-1) in 1991. These were followed by three supplementary P rates – 0, 44 and 88 kg ha-1 in 1992. Three crops of maize (cv COCA) were grown to monitor the availability of the residual P. Experimental design was randomized complete block with four replications in 1991 and a split-plot in 1992 and 1993. The soils at the experimental sites were rich in organic P which formed 67% and 57% of total P at Mfonta and Babungo respectively. Laboratory P sorption studies indicated high P requirements by the basaltic soils used in the study. The amounts of P sorbed to attain 0.2 ug g-1 in soil solution were 1200 ug g-1 at Mfonta and 600 ug g-1 at Babungo. In spite of these high P sorption capacities, significant responses to small rates of P application were observed. It was concluded that a sizable proportion of P released from organic P mineralization was used to satisfy P sorption capacity of the soils, resulting in maize response to small rates of fertilizer P application. Residual P effects on maize yield were related to applied P. Bray 1 extractable soil P was weakly related to grain yields (r = 0.136 at Mfonta and r = 0.186 at Babungo). A critical value of 5.5 mg kg-1 Bray 2 extractable P in the soil was established for maize at Mfonta site. About 44 kg P ha-1 was recommended for maize at this site when Bray 2 soil P test was below this critical value.
dc.titleResponse of maize (Zea mays) to phosphorus application on basaltic soils in Northwestern Cameroon
dc.typeJournal Article
dc.description.versionPeer Review
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationInstitute of Agricultural Research
cg.coverage.regionWest Africa
cg.coverage.regionCentral Africa
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectFood Security
cg.iitasubjectSoil Health
cg.iitasubjectSoil Fertility
cg.accessibilitystatusLimited Access

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