Maize productivity relationships were studied at Ibadan in the derived savanna of south-western Nigeria using the CERES-Maize simulation model at six crop densities ranging from 2.96 to 13.3 plants m-2. The absolute growth rate for all plant components decreased linearly with density. The optimum...
Jagtap, S.S.
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Alabi, R.T.
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Adeleye, O.
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[The influence of maize density on resource use and productivity: an experimental and simulation study]
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The influence of maize density on resource use and productivity: an experimental and simulation study
Grain yield of maize (Zea mays L.) in the tropics are generally low and information on combining ability among tropical maize inbred lines has not been reported for West Africa. This study was conducted to estimate combining abilities of maize inbred lines developed for West Africa. Crosses obtai...
Kim, S.K.
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Ajala, S.O.
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[Combining ability of tropical maize germplasm in West Africa II. Troppical vs temperate x tropical origins]
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Combining ability of tropical maize germplasm in West Africa II. Troppical vs temperate x tropical origins
The cowpea breeding programmes are reviewed and achievements at two major centres of cowpea research, i.e. IITA (Nigeria) and IARI (India), are summarized. Earlyand extra early genotypes are always photoperiod-insensitive, medium maturity varieties could be sensitive or neutral today length, whil...
Adda, C.
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Borgemeister, C.
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Meikle, W.G.
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Markham, R.H.
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Olaleye, I.
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Abdou, K.S.
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Zakari, M.O.
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[First record of the larger grain borer, Prostephanus truncatus (Horn) (Coleoptera: Bostrichidae), in the Republic of Niger]
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First record of the larger grain borer, Prostephanus truncatus (Horn) (Coleoptera: Bostrichidae), in the Republic of Niger
Success of seed development following sexual crosses is primarily dependent on proper endosperm function and development. The failure to produce triploids, or “triploid block” in 4x×2x crosses served as the impetus for numerous studies of embryo and endosperm to attempt to explain cross failure. ...
Ehlenfeldt, M.K.
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Ortiz, R.
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[Evidence on the nature and origins of endosperm dosage requirements in Solanum and other angiosperm genera]
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Evidence on the nature and origins of endosperm dosage requirements in Solanum and other angiosperm genera
Everett, L.
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Eta-Ndu, J.T.
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Ndioro, M.
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Walker, P.
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[Combining ability among source populations for tropical midaltitude maize inbreds]
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Combining ability among source populations for tropical midaltitude maize inbreds
. A distributed-delay, demographic simulation model of Prostephanus tnmcatus (Horn) populations in rural maize (Zea mays L.) stores was developed and validated. Developmental and mortality parameters for eggs, larvae, and pupae, and the life span and fecundity data for adult insects, were estimat...
Meikle, W.G.
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Holst, N.
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Scholz, D.
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Markham, R.H.
,
[Simulation model of Prostephanus truncatus (Coleoptera: Bostrichidae) in rural maize stores in the Republic of Benin]
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Simulation model of Prostephanus truncatus (Coleoptera: Bostrichidae) in rural maize stores in the Republic of Benin
The severity and increase of the Imperata cylindrica constraint as a weed, the decline of the traditional fallow systems as a means of soil fertility management and the lack of inorganic fertilizer appear to have created opportunities for adoption of mucuna (Mucuna pruriens) technology by smallho...
Sanginga, N.
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Ibewiro, B.
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Houngnandan, P.
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Vanlauwe, Bernard
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Okogun, J.A.
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Akobundu, I.O.
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Versteeg, M.
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[Evaluation of symbiotic properties and nitrogen contribution of mucuna to maize grown in the derived savanna of West Africa]
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Evaluation of symbiotic properties and nitrogen contribution of mucuna to maize grown in the derived savanna of West Africa
The spatial distribution of five lepidopterous pests, Sesamia calamistis Hampson (Noctuidae), Eldana saccharina Walker (Pyralidae), Spodoptera exempta (Walker) (Noctuidae), Mussidia nigrivenella (Ragonot) (Pyralidae), and Cryptophlebia leucotreta (Meyrick) (Tortricidae), on maize in West Africa i...
Schulthess, F.
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Bosque Pérez, N.A.
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Gounou, S.
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[Sampling lepidopterous pests on maize in West Africa]
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Sampling lepidopterous pests on maize in West Africa
Farmer-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 f...
Mutsaers, H.J.W.
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Walker, P.
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[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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Farmers maize yields in S.W. Nigeria and the effect of variety and fertilizer: an analysis of variability in onfarm trials