Maize-nutrient response functions for eastern and southern Africa

Simple item page
cg.authorship.typesCGIAR and developing country instituteen
cg.contributor.affiliationUniversity of Nebraskaen
cg.contributor.affiliationMlingano Agricultural Research Institute, Tanzaniaen
cg.contributor.affiliationRwanda Agriculture Boarden
cg.contributor.affiliationKenya Agricultural and Livestock Research Organizationen
cg.contributor.affiliationZambia Agricultural Research Instituteen
cg.contributor.affiliationChitedze Agricultural Research Station, Malawien
cg.contributor.affiliationLilongwe University of Agriculture and Natural Resourcesen
cg.contributor.affiliationInternational Institute of Tropical Agricultureen
cg.contributor.affiliationNational Agricultural Research Organisation, Ugandaen
cg.contributor.affiliationNational Institute for Agricultural Research Studies, Democratic Republic of the Congoen
cg.contributor.crpRoots, Tubers and Bananas
cg.coverage.countryKenya
cg.coverage.countryMalawi
cg.coverage.countryRwanda
cg.coverage.countryTanzania
cg.coverage.iso3166-alpha2KE
cg.coverage.iso3166-alpha2MW
cg.coverage.iso3166-alpha2RW
cg.coverage.iso3166-alpha2TZ
cg.coverage.regionAfrica
cg.coverage.regionEastern Africa
cg.creator.identifierNsharwasi Leon Nabahungu: 0000-0002-2104-3777
cg.howPublishedFormally Publisheden
cg.identifier.doihttps://doi.org/10.2134/agronj2018.04.0268en
cg.identifier.iitathemeNATURAL RESOURCE MANAGEMENT
cg.isijournalISI Journalen
cg.issn0002-1962en
cg.issue5en
cg.journalAgronomy Journalen
cg.reviewStatusPeer Reviewen
cg.subject.iitaMAIZEen
cg.subject.iitaNATURAL RESOURCE MANAGEMENTen
cg.subject.iitaSOIL FERTILITYen
cg.volume110en
dc.contributor.authorWortmann, Charles S.en
dc.contributor.authorSenkoro, C.en
dc.contributor.authorCyamweshi, A.R.en
dc.contributor.authorKibunja, C.N.en
dc.contributor.authorNkonde, D.en
dc.contributor.authorMunthali, M.en
dc.contributor.authorNalivata, P.en
dc.contributor.authorNabahungu, L.N.en
dc.contributor.authorKaizzi, K.en
dc.date.accessioned2018-09-28T09:08:10Zen
dc.date.available2018-09-28T09:08:10Zen
dc.identifier.urihttps://hdl.handle.net/10568/97539
dc.titleMaize-nutrient response functions for eastern and southern Africaen
dcterms.abstractInformation is scarce for maize (Zea mays L.) response to nutrient application for many production areas in tropical Africa. Research was conducted to determine macronutrient response functions and to diagnose Mg–S–Zn–B deficiencies. Site–year × N-rate interactions within countries often accounted for little variation in yield relative to the N-rate effect. Country mean grain yield responses to N-rate were curvilinear to plateau, but linear in Malawi. Although mean yields differed, the response to N was similar for Kenya, Tanzania, and Zambia with a mean yield increase of 0.94 Mg ha–1 due to 50 kg ha–1 N compared with 1.59 Mg ha–1 for Malawi and Rwanda. Response to N was related to yield with no fertilizer applied (r = 0.40). Only Rwanda had mean responses to P and K with respective yield increases of 0.99 and 0.22 Mg ha–1 due to 15 kg ha–1. Application of Mg–S–Zn–B caused a mean yield increase of 0.73 Mg ha–1 in Rwanda but had no effect in other countries. Application of affordable fertilizer to twice as much land at 50% compared with 100% of the economically optimum rate results in mean gains of 50% for production and agronomic efficiency and 72% for profit/cost ratio. Soil test results were not related to response to applied nutrients but historical yield appears to be weakly predictive of N response. The determined country-level P and K response functions can be widely applied, except for Kenya, in consideration of other available information. The response to Mg–S–Zn–B in Rwanda needs further investigation.en
dcterms.accessRightsLimited Access
dcterms.audienceScientistsen
dcterms.available2018-09
dcterms.bibliographicCitationWortmann, C.S., Senkoro, C., Cyamweshi, A.R., Kibunja, C., Nkonde, D., Munthali, M., ... & Kaizzi, K. (2018). Maize-nutrient response functions for eastern and southern Africa. Agronomy Journal, 110(5), 2070-2079.en
dcterms.extent2070-2079en
dcterms.issued2018-09
dcterms.languageen
dcterms.licenseCopyrighted; all rights reserved
dcterms.publisherWileyen
dcterms.subjectmaizeen
dcterms.subjectnutrienten
dcterms.subjectsoil typesen
dcterms.typeJournal Article

Files

License bundle

Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.75 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

IITA Journal Articles
RTB Journal Articles