Resultados de búsqueda - "Nigeria"

Repeatability and genetic advances in early maturing maize hybrid trials conducted under Striga-infested and non-infested conditions por Abubakar, A.M., Adejumobi, I.I., Fowobaje, K.R., Dieng, I., Saminu, Z., Imoro, S., Badu-Apraku, B.

“…A total of 159 hybrids from 21 international trials were evaluated under Striga-infested (STRINF) and Striga non-infested (STRNON) conditions at Mokwa and Abuja, Nigeria, from 2010 to 2021. The data were used to (i) determine the genetic enhancements in grain yield and Striga adaptive traits and (ii) assess the repeatability of the trials in identification of promising hybrids. …”
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Nutritional complexities associated with ph variables in humid tropical soils por Fox, R.L., Saidy, N.A., Yost, R.S., Kang, B.

“…Such variability made possible an indigenous-function investigation using soybeans growing on an Alfisol of Nigeria. Increasing yield with increasing soil pH of the Alfisol was associated with increased N fixation, and this with decreased Mn in the foliage. …”
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Hydroclimatic extremes and food security hotspots in West Africa: evidence from rainfall–yield interactions por Obahoundje, Salomon, Tilahun, Seifu A., Schmitter, Petra

“…Maize yields increased by 40%–50% in the Sahelian, Sudanian, and parts of the Guinean zones, while rice yields declined by 20%–50% in Nigeria’s Sudanian and Eastern Guinea regions. Soybean showed localized yield gains but remained extremely sensitive to rainfall deficits and heat extremes. …”
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Unveiling hepatitis E virus diversity in Sudan's internally displaced populations: a molecular epidemiology approach por Osman, H.A., Bakr, W.M.K., Hashish, M.H., Elkhidir, I.M., Bedri, S., Oyola, Samuel O., Norder, H., El-Wahab, E.W.A.

“…The isolates clustered with reference strains from Chad and Nigeria, indicating regional circulation and genetic conservation of HEV-1e in sub-Saharan Africa. …”
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Potential contribution of Lablab residues to maize production in moist savanna of West Africa por Ewansiha, S.U., Tarawali, Shirley A., Odunze, A.C., Iwuafor, E.N.O.

“…In this context, response of maize to N following natural fallow or lablab fallow was investigated in the northern Guinea savanna of Nigeria. Lablab plots were maintained for 2 years—first planted in 2000 and replanted in 2001. …”
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Evaluation of participatory disease surveillance for highly pathogenic avian influenza in Africa and rinderpest in Pakistan por Hannah, H., Pali, Pamela N., Rware, H.I., Bett, Bernard K., Randolph, Thomas F., Grace, Delia, Njuki, Jemimah, Pissang, C., Hisrich, E.

“…Data were collected from 120 individuals by workshops, questionnaires and semi-structured interviews in Benin, Nigeria, Pakistan, Tanzania, Togo and Uganda. PDS results were consistent with other data for absence of disease but the absence of detected cases and a dearth of epidemiological and surveillance data prevented quantification of some indicators. …”
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A transport model for the spread of bird flu por Hansen, Frank, Sonder, Kai, Okike, Iheanacho, Bett, Bernard K., Randolph, Thomas F., Mariner, Jeffrey C., Pfeiffer, Dirk U.

“…Data of past outbreaks of HPAI in Nigeria were used to validate the model. The data were also used to calculate the expected number of secondary outbreaks resulting from an infected farm during the period the farm is infective. …”
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Forage legumes for improved fallows in agropastoral systems of subhumid West Africa. II. Green manure production and decomposition after incorporation into the soil por Muhr, L., Tarawali, Shirley A., Peters, Michael, Schultze-Kraft, Rainer

“…As part of the evaluation, the ability of 11 legume species (Centrosema macrocarpum, C. pubescens, Stylosanthes guianensis, Pueraria phaseoloides, Mucuna pruriens, Zornia glabra, Dioclea guianensis, Arachis pintoi, Aeschynomene histrix, Calopogonium caeruleum, Flemingia macrophylla) to accumulate biomass and nitrogen after dry season harvest of herbage was assessed at 2 sites in south-west Nigeria. Litter bags were subsequently used to study the potential nutrient contribution to maize from decomposing green manure for 6 of the 11 species in comparison with natural fallow vegetation. …”
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Chemical composition, rumen degradation, and gas production characteristics of some multipurpose fodder trees and shrubs during wet and dry seasons in the humid tropics por Larbi, Asamoah, Smith, Jimmy W., Kurdi, I.O., Adekunle, I.O., Raji, A.M., Ladipo, D.O.

“…The experiment was conducted in Ibadan, southestern Nigeria during the main-wet (April-August) and dry (December-March) seasons. …”
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Groundnut (Arachis hypogaea) for food and fodder in crop-livestock systems: Forage and seed yields, chemical composition and rumen degradation of leaf and stem fractions of 38 cult... por Larbi, Asamoah, Dung, D.D., Olorunju, P.E., Smith, Jimmy W., Tanko, R.J., Muhammad, I.R., Adekunle, I.O.

“…Variations in forage and seed yields of 38 late-maturing groundnut cultivars were determined in 1995 and 1996 at Samaru, Zaria, northern Nigeria. Crude protein (CP), neutural detergent fibre (NDF), in sacco degradation of dry matter (DM), and nitrogen (N) were also estimated. …”
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Renforcement des capacités des systèmes d’innovation agricoles : Des outils, des principes ou des politiques ? por Hall, A., Sulaiman, R., Beshah, T., Madzudzo, E., Puskur, Ranjitha

“…Le problème récurrent de la pénurie de fourrage : bétail dans le nord du Nigeria. Une des principales critiques adressée à la recherche agricole, et exprimée par toute une génération de praticiens du développement rural et de penseurs systémiques, est que la recherche ne parvient pas à répondre aux besoins en constante évolution des agriculteurs. …”
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Forage legumes for improved fallows in agropastoral systems of subhumid West Africa. II. Green manure production and decomposition after incorporation into the soil por Muhr, L, Tarawali, Shirley A., Peters, Michael, Schultze-Kraft, Rainer

“…As part of the evaluation, the ability of 11 legume species (Centrosema macrocarpum, C. pubescens, Stylosanthes guianensis, Pueraria phaseoloides, Mucuna pruriens, Zornia glabra, Dioclea guianensis, Arachis pintoi, Aeschynomene histrix, Calopogonium caeruleum, Flemingia macrophylla) to accumulate biomass and nitrogen after dry season harvest of herbage was assessed at 2 sites in south-west Nigeria. Litter bags were subsequently used to study the potential nutrient contribution to maize from decomposing green manure for 6 of the 11 species in comparison with natural fallow vegetation. …”
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Amélioration de la gestion des sols par l'introduction de légumineuses dans les systèmes céréaliers des savanes africaines por Carsky, R.J., Douthwaite, Boru, Manyong, Victor M., Sanginga, Nteranya, Schulz, S., Vanlauwe, Bernard, Diels, J., Keatinge, J.D.H.

“…L‘impact de cet effort est très net au nord du Nigeria, où la rotation soja?maïs sur deux ans augmente le revenu brut de 50 à 70 % par rapport à la monoculture du maïs, du fait d‘un contexte économique incitatif. …”
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Breeding for enhanced ß-Carotene content in cassava: constraints and accomplishments por Njoku, DN, Vernon, G, Egesi, Chiedozie N., Asante, I.K., Offei, SK, Okogbenin, Emmanuel, Kulakow, Peter A., Eke-Okoro, O.N., Ceballos, H.

“…The ultimate objective is to reduce diseases caused by micronutrient deficiencies. Nigeria, with 140 million people and the largest producer and consumer of cassava in the world, is characterized by rampant malnutrition and high incidence of nutrient deficiency-related diseases. …”
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Antimicrobial use in developing countries por Grace, Delia, Lindahl, Johanna F., Hung Nguyen-Viet, Kakkar, M.

“…Based on livestock intensification patterns, China, Brazil and India are current hotspots, and future hotspots with fastest growth of the intensive livestock sector in Myanmar, Indonesia, Nigeria, Peru and Vietnam. China is a hotspot for aquaculture and Indonesia, Thailand, Vietnam, Bangladesh, India and Chile are other countries where antimicrobial use in fish production may be problematic. …”
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Technical innovations for small-scale producers and households to process wet cassava peels into high quality animal feed ingredients and aflasafe™ substrate por Okike, Iheanacho, Samireddypalle, A., Kaptoge, L., Fauquet, Claude M., Atehnkeng, J., Bandyopadhyay, Ranajit, Kulakow, Peter A., Duncan, Alan J., Alabi, Tunrayo, Blümmel, Michael

“…Nigeria, the world’s largest producer of cassava, harvests 54 million metric tonnes (Mt) of cassava tubers annually. …”
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Vulnerability to climate change of cocoa in West Africa: patterns, opportunities and limits to adaptation por Schroth, Götz, Läderach, Peter R.D., Martínez Valle, Armando Isaac, Bunn, Christian, Jassogne, Laurence T.P.

“…We find that: 1) contrary to expectation, maximum dry season temperatures are projected to become as or more limiting for cocoa as dry season water availability; 2) to reduce the vulnerability of cocoa to excessive dry season temperatures, the systematic use of adaptation strategies like shade trees in cocoa farms will be necessary, in reversal of the current trend of shade reduction; 3) there is a strong differentiation of climate vulnerability within the cocoa belt, with the most vulnerable areas near the forest-savanna transition in Nigeria and eastern Côte d'Ivoire, and the least vulnerable areas in the southern parts of Cameroon, Ghana, Côte d'Ivoire and Liberia; 4) this spatial differentiation of climate vulnerability may lead to future shifts in cocoa production within the region, with the opportunity of partially compensating losses and gains, but also the risk of local production expansion leading to new deforestation. …”
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Biophysical criteria used by farmers for fallow selection in West and Central Africa por Norgrove, L., Hauser, S.

“…The most exhaustive lists of indicator plants were reported from southern Cameroon, the Ashante region of Ghana and south west Nigeria. Chromolaena odorata was the most frequently mentioned plant indicator species. …”
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Gene action and heterotic groups of early white quality protein maize inbreds under multiple stress environments por Badu-Apraku, Baffour, Gedil, Melaku A, Fakorede, M.A.B., Akinwale, R., Fasanmade, Y., Annor, B., Talabi, A.O., Oyekunle, M., Akaogu, I.C., Aderounmu, M.

“…‐infested environments in Nigeria for 2 yr. The objectives were to (i) examine the gene action conditioning the traits in the inbreds, (ii) classify them into heterotic groups using two methods, (iii) identify the best QPM inbred testers across environments, and (iv) identify stable and high‐yielding hybrids. …”
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Genetic gains in grain yield under nitrogen stress following three decades of breeding for drought tolerance and Striga resistance in early maturing maize por Badu-Apraku, Baffour, Fakorede, M.A.B., Oyekunle, M., Akinwale, R.

“…This hypothesis was tested by evaluating the 50 cultivars in 2010 and 2011 in Nigeria at Mokwa and Ile-Ife under both low-N (30 kg N/ha) and high-N (90 kg N/ha) levels. …”
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