Show simple item record

dc.contributor.authorWortmann, C.S.
dc.contributor.authorSenkoro, C.
dc.contributor.authorCyamweshi, A.R.
dc.contributor.authorKibunja, C.N.
dc.contributor.authorNkonde, D.
dc.contributor.authorMunthali, M.
dc.contributor.authorNalivata, P.
dc.contributor.authorNabahungu, L.N.
dc.contributor.authorKaizzi, K.
dc.date.accessioned2019-12-04T11:24:30Z
dc.date.available2019-12-04T11:24:30Z
dc.date.issued2018-08-20
dc.identifier.citationWortmann, 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.
dc.identifier.issn0002-1962
dc.identifier.urihttps://hdl.handle.net/20.500.12478/4383
dc.description.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.
dc.format.extent2070-2079
dc.language.isoen
dc.subjectMaize
dc.subjectNutrient
dc.subjectSoil Types
dc.titleMaize-nutrient response functions for eastern and southern Africa
dc.typeJournal Article
dc.description.versionPeer Review
cg.contributor.crpRoots, Tubers and Bananas
cg.contributor.affiliationUniversity of Nebraska, Lincoln
cg.contributor.affiliationMlingano Agricultural Research Institute, Tanzania
cg.contributor.affiliationRwanda Agricultural Board
cg.contributor.affiliationKenya Agricultural & Livestock Research Organization
cg.contributor.affiliationZambia Agriculture Research Institute
cg.contributor.affiliationChitedze Agricultural Research Station
cg.contributor.affiliationLilongwe University of Agriculture and Natural Resources
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationNational Agricultural Research Laboratories (NARL-Kawanda)
cg.coverage.regionAfrica
cg.coverage.regionEast Africa
cg.coverage.countryKenya
cg.coverage.countryMalawi
cg.coverage.countryRwanda
cg.coverage.countryTanzania
cg.creator.identifierNsharwasi Nabahungu: 0000-0002-2104-3777
cg.researchthemeNATURAL RESOURCE MANAGEMENT
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectMaize
cg.iitasubjectNatural Resource Management
cg.iitasubjectSoil Fertility
cg.journalAgronomy Journal
cg.howpublishedFormally Published
cg.accessibilitystatusLimited Access
local.dspaceid100621
cg.targetaudienceScientists
cg.identifier.doihttps://dx.doi.org/10.2134/agronj2018.04.0268


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record