Resultados de búsqueda - "Nigeria"

Insertion/deletion polymorphism of the angiotensinconverting enzyme gene and the risk of hypertension among residents of two cities, SouthSouth Nigeria por Kooffreh, M.E., Anumudu, C.I., Kumar, P. Lava

“…This study was designed to determine the frequency of the I/D polymorphism of the angiotensin-converting enzyme gene and its association with hypertension in a sample population of Calabar and Uyo, South-South Nigeria. Materials and Methods: A population-based case control design consisting of total of 1224 participants, 612 each of patients and controls, were randomly recruited from hypertension clinics and the general population. …”
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Weed seedbank characteristics of arable fields under different fallow management systems in the humid tropical zone of southeastern Nigeria por Akobundu, I.O., Ekeleme, F.

“…The study plots were at Mbaise, a densely populated area of southeastern Nigeria, where farmers regenerate their exhausted soils by maintaining planted fallows of Dactyladenia barteri (Hook. …”
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Climate variability/change and attitude to adaptation technologies: a pilot study among selected rural farmers’ communities in Nigeria por Ayanlade, Ayansina, Radeny, Maren A.O., Akin-Onigbinde, Akintomiwa I.

“…This Paper aims at assessing climate variability/change, the perception of rural farmers on climate change and preferred adaptation strategies among the farmers in some selected farming communities in Nigeria. The study thus used both meteorology data and social survey, to examine variability/change in climate and factors determining the adaptation techniques adopts by rural farmers. …”
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Long-term integrated soil fertility management in South-Western Nigeria: crop performance and impact on the soil fertility status por Vanlauwe, Bernard, Nziguheba, Generose, Nwoke, O.C., Diels, J., Sanginga, Nteranya, Merckx, Roel

“…Crop response, tree biomass production and changes in soil fertility characteristics were monitored in a long-term (1986–2006) alley-cropping trial in Ibadan, Nigeria. The systems included two alley cropping systems with Leucaena leucocephala and Senna siamea on the one hand and a control (no-trees) system on the other hand, all cropped annually with a maize- cowpea rotation. …”
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First report of maize yellow mosaic virus infecting sugarcane (Saccharum spp.) and itch grass (Rottboellia cochinchinensis) in Nigeria por Yahaya, A., Al Rwahnih, M., Dangora, D.B., Gregg, L., Alegbejo, M.D., Kumar, P. Lava, Alabi, O.J.

“…During routine surveys conducted from February to July 2015 in the northern guinea savannah region of Nigeria, sugarcane and itch grass (Rottboellia cochinchinensis) plants showing virus-like mosaic symptoms were encountered in farmers’ sugarcane fields in Kaduna State. …”
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Genetic gain in yield and agronomic characteristics of cowpea cultivars developed in the Sudan savannas of Nigeria over the past three decades por Kamara, A.Y., Tefera, H., Ewansiha, S.U., Ajeigbe, Hakeem A., Okechukwu, R.U., Boukar, O., Omoigui, L.O.

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Study of the dynamics of resource use and identification of policy gaps in agricultural production, processing, and marketing in the Sudan Savannas of Northern Nigeria por Abalu, G.I., Abdoulaye, Tahirou, Kamara, A.Y., Adekunle, A.

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Cultivar and insecticide spraying regimes effects on insect pests and grain yield of cowpea in the dry savannas of north-eastern Nigeria por Kamara, A.Y., Chikoye, David, Omoigui, L.O., Dugje, I.Y.

“…Cowpea is an important food legume and versatile crop in the savannas of northeast Nigeria. Despite the high potential for production in this region, insect pests are a major constraint. …”
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Root rot fungi succession during cassava (Manihot esculenta. Crantz) tuberous development in different ecological zones of Nigeria por Aigbe, S.O., Remison, S.U., Bandyopadhyay, Ranajit

“…Root rot fungi succession during cassava tuberous root development was investigated in Ibadan (Derived savanna), Sabongidda-Ora and Onne (Humid forests) of Nigeria. Two improved cassava varieties (TMS 30572 and TMS 4 (2) 1425) and one local (TME-1) were planted in a randomized complete block design with 3 replications. …”
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Variability in agricultural and biological yields of ten musa genotypes evaluated for two cropping cycles in a subhumid environment of Nigeria por Baiyeri, K.P., Tenkouano, A.

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Influence of cereal legume rotation on Striga control and maize grain yield in farmers fields in the northern Guinea Savanna of Nigeria por Kureh, I., Kamara, A.Y., Tarfa, B.D.

“…On-farm trials were conducted in 2001, 2002, and 2003 in the northern Guinea savanna of Nigeria to evaluate integrated Striga hermonthica control measures under farmermanaged conditions. …”
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Participatory selection of a maize (Zea mays L.) variety for the control of stem borers in a southeastern Nigeria location por Olaoye , G., Ajala, S.O., Adedeji, S.A.

“…Consequently a total of 275 farmers were engaged in the promotion of stem borer resistantmaize varieties in the stem borer endemic maize growing ecologies of southeastern Nigeria over a three-year period. Results obtained revealed thesuperiority of the two tested stem borer resistant varieties over the local check with one of them, Ama-TZBR-W, being more preferred by farmers.The preferred variety had better overall appeal, increased number of ears harvested and almost a four-fold increase in the number of marketablecobs when compared with the local check under the predominantly intercropping pattern practiced in the region, especially in the late croppingseason, a season with high incidence of borer infestation. …”
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Extension agents perception of participatory agricultural extension approaches adopted by Agricultural Development Programme (ADP) in Ondo State Nigeria por Ajayi, M.T., Okafor, C.

“…Data were collected through the use of structured questionnaire from all the 47 extension agents purposely selected from Ondo Central zone of Agricultural Development Project, Ondo state Nigeria.…”
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PCR markerbased analysis of wild and cultivated yams (Dioscorea spp.)in Nigeria: genetic relationships and implication for ex situ conservation por Mignouna, H., Abang, Mathew M., Wanyera, N., Chikaleke, V., Asiedu, Robert, Thottappilly, G.

“…Reliable characterization of the variation among wild and cultivated yams in Nigeria is essential for improved management and efficient utilization of yam genetic resources. …”
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Effects of nematode infection and mulching on the yield of plantain (Musa spp., AABgroup) ratoon crops and plantation longevity in Southeastern Nigeria por Coyne, Danny L., Rotimi, O., Speijer, P., Schutter, B. de, Dubois, T., Auwerkerken, A., Tenkouano, A., Waele, D. de

“…Agbagba (Musa spp., AAB-group, false horn) yield and plantation longevity were examined in a field experiment at the High Rainfall Station of the International Institute of Tropical Agriculture (IITA) at Onne in southeastern Nigeria. The 2nd, 3rd and 4th crop cycles (1st, 2nd and 3rd ratoon, respectively) following the plant crop cycle (mother crop) were examined in nematode inoculated or non-inoculated and mulched or non-mulched treatments. …”
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Effect of drought and weed management on maize genotypes and the tensiometric soil water content of an eutric nitisol in south Western Nigeria por Azeez, J., Chikoye, David, Kamara, A., Menkir, A., Adetunji, M.

“…Field trials were conducted in 2002 and 2003 at Ikenne southwestern Nigeria to investigate the effect of weed pressures and drought stress on 2 maize (Zea mays L.) hybrids (9134-14, 9803-9) and 2 open-pollinated varieties (STREVIWD, IYFDCO1). …”
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Seasonal variations in the chemical and functional properties of starches from local and improved cassava varieties in high rainfall region of Nigeria por Eke, J., Achinewhu, S.C., Sanni, Lateef O., Barimalaa, I.S., Maziya-Dixon, B.B., Dixon, A.

“…The aim was to investigate the chemical and functional properties of starches produced from 39 different cassava varieties (36 varieties resistant to cassava mosaic disease and three checks TMS 30572, 4(2) 1425 and 8200058) in two planting seasons at the experimental farm of the International Institute of Tropical Agriculture, Onne, Rivers State, Nigeria. Varieties screened showed significant seasonal and varietal differences (p<0.05) in all the properties over two harvesting seasons. …”
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Alley cropping with Senna siamea in southwestern Nigeria: 1 Recovery of 15N labelled urea by the alley cropping system por Vanlauwe, Bernard, Sanginga, N., Merckx, Roel

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Food demand and market studies in the drier savanna of Nigeria: proceedings of a Methodology and stakeholders workshop, 78 September, 1999 por Kormawa, P.M., Aiyedun, E.

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Comparative evaluation of the contributions of soil physicochemical properties to variations in the yields of four major staple food crops in eastern Nigeria por Asadu, C., Dixon, A., Okechukwu, R.

“…The data were from three replicates of two randomized complete block design experiments sited in a newly cleared forest and on previously cultivated land both in Nsukka, eastern Nigeria. The 28 soil physicochemical properties and six crop yield parameters measured were partitioned between location and year before applying a stepwise regression procedure to analyze them. …”
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