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High cost of nitrogen fertilizer coupled with frequent occurrence of drought has forced many maize (Zea mays L.) growers in sub-Saharan Africa to either apply fertilizer below optimal dose or no fertilizer to their maize fields. The objectives of this study were to (i) compare the performance of ...


Meseka, S.K.Menkir, A.Elhassan, A.Ibrahim, S.S.Ajala, S.Kamara, A.[Responses of maize hybrids developed for drought tolerance to low soil nitrogen]Responses of maize hybrids developed for drought tolerance to low soil nitrogen

Nitrogen stress is a major nutrient constraint to maize productivity in the Northern Guinea savanna of West and Central Africa. Thus, improved maize germplasm tolerant to low N with the capacity to utilize N more efficiently together with improved agronomic practices appear to be the primary cont...


Omoigui, L.Alabi, S.Ado, S.Ajala, S.Kamara, A.[Genetic gains from cycles of fullsib recurrent selection for low nitrogen tolerance in a tropical maize population]Genetic gains from cycles of fullsib recurrent selection for low nitrogen tolerance in a tropical maize population

One hundred elite, open-pedigree tropical and subtropical inbreds of maize (Zea mays L.) that had been screened in 60 tropical trials were evaluated as inbreds and in testcrosses in Nigeria. The 24 superior inbreds among these were chosen to create two diallel sets for evaluation of grain yield a...


Kim, S.K.Ajala, S.Brewbaker, J.L.[Combining ability of tropical maize germplasm in West Africa. III. Tropical maize inbreds]Combining ability of tropical maize germplasm in West Africa. III. Tropical maize inbreds

Low soil nitrogen limits maize (Zea mays L.) production in the West and Central African subregion. Levels of residual genetic variability were determined in two low‐N populations using selfed progeny evaluations, and results obtained indicate large genotypic and phenotypic variances for grain yie...


Ajala, S.Olaniyan, A.B.Olayiwola, M.O.Job, A.O.[Yield improvement in maize for tolerance to low soil nitrogen]Yield improvement in maize for tolerance to low soil nitrogen

The International Institute of Agriculture (IITA) is among the major suppliers of genetic materials to national agricultural research and extension systems in West and Central Africa for the development of improved maize varieties. This paper presents the results of a survey of the impact of germ...


Manyong, Victor M.Kling, J.Makinde, K.Ajala, S.Menkir, A.[Impact of IITA improved germplasm on maize production in West and Central Africa]Impact of IITA improved germplasm on maize production in West and Central Africa

The role of four colonizing responses (oviposition, larval arrest, larval establishment and larval feeding) of Sesamia calamistis (Lepidoptera:Noctuidae) in determining the resistance or susceptibility of eight genotypes of maize Zea mays L.) was elucidated. Four resistant (S59-1, 55 1 1-1, 55 27...

cette 6tude a mis en 6vidence les m6canismes responsables de laresistance et la susceptibilite de huit g€notypes de mais par rapportau comportement de Ponte des femelles, d'orientation (arr€D'd'6tablissement et d'alimentation des larves de Sesomia colomistis.Les trois groupes de g6notypes suivant...


Aroga, R.Ajala, S.[Colonization of resistant and susceptible maize genotypes by the pink stem borer, Sesamia calamistis (Lepidoptera: Noctuidae)]Colonization of resistant and susceptible maize genotypes by the pink stem borer, Sesamia calamistis (Lepidoptera: Noctuidae)

Maize (Zea mays L.) production in west Africa (WA) is constrained by drought, Striga hermonthica infestation and low soil nitrogen (N). Maize varieties resistant to Striga, drought, and low N are ideal for WA, but genotype × environment interaction on these traits are usually significant due to d...


Badu-Apraku, B.Menkir, A.Ajala, S.Akinwale, R.Oyekunle, M.Obeng-Antwi, K.[Performance of tropical early maturing maize cultivars in multiple stress environments]Performance of tropical early maturing maize cultivars in multiple stress environments

The study accessed the profitability of the usage of all input in crop production through Community-Based Agricultural and Rural Development Project (CBARDP) among rural dwellers in the Northern part of the country with the view of comparing the input usage to recommended practices. The study was...


Awotide, D.O.Ikudaisi, O.J.Ajala, S.Kaltungo, J.H.[Input use and profitability of arable crops production in Nigeria]Input use and profitability of arable crops production in Nigeria

Maize is an important economic crop grown in Nigeria. Its production is dramatically affect by the pink stem borer—Sesamia calamistis (Hampson, Noctuidae) and sugarcane borer—Eldana saccharina (Walker, Pyralidae) that are endemic in Southeastern Nigeria. In areas of stress, existing genotypes may...


Ngwuta, A.Ajala, S.Obi, I.U.Ene-Obong, E.E.[Selection of maize genotypes resistant to pink stem borer and sugarcane borer.]Selection of maize genotypes resistant to pink stem borer and sugarcane borer.

The balanced use of inorganic amendments to enhance effective crop production for developing world economies like Nigeria is paramount to achieve her Millennium Development Goals (MDGs) for its teeming population. Thus this study was carried out to assess the relative growth performances of a maj...


Chukwuka, K.Ajala, S.Nwosu, P.C.Omotayo, O.E.Chukwuka, K.[Effects of NPK single fertilizers on relative growth performances of two cycles of maize (Zea mays L.) grown in a degraded soil of Southwest Nigeria]Effects of NPK single fertilizers on relative growth performances of two cycles of maize (Zea mays L.) grown in a degraded soil of Southwest Nigeria

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