Resultados de búsqueda - "Nigeria"

Recent advances in research on draught ruminants por Pearson, R.A., Zerbini, E., Lawrence, P.R.

“…The technical and agronomic innovations necessary for the introduction of animal power into an inland valley region of central Nigeria are described and some of the sociological implications discussed.…”
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A close look at a rare African breed - the Kuri cattle of Lake Chad Basin: Origin, distribution, production and adaptive characteristics por Tawah, C.L., Rege, J.E.O., Aboagye, G.S.

“…The Kuri is a rare, little known breed of cattle of the Hamitic Longhorn (Bos taurus longifrons) type which is found on the islands and shores of Lake Chad Basin in the area covering the common borders of Cameroon, Chad, Niger and Nigeria. It is taller and more massive than its longhorn counterpart, the trypanotolerant N'Dama. …”
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Desarrollo de la capacidad de sistemas de innovación agrícola : ¿Instrumentos, principios o políticas? por Hall, A., Sulaiman, R., Beshah, T., Madzudzo, E., Puskur, Ranjitha

“…Persiste el antiguo problema de la escasez de forraje: ganado en Nigeria septentrional. Una persistente crítica de la investigación agrícola, expresada por una generación de profesionales del desarrollo rural y teóricos de sistemas, ha sido que la investigación no ha respondido a las cambiantes necesidades de los agricultores; y también que, si bien la investigación es eficaz para desarrollar tecnologías, la adopción de éstas ha sido débil. …”
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Identification of early-maturing maize inbred lines based on multiple traits under drought and low N environments for hybrid development and population improvement por Badu-Apraku, Baffour, Akinwale, R.

“…Studies were conducted from 2007 to 2009 at three locations in Nigeria under induced drought stress and low nitrogen conditions. …”
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Taro leaf blight - A threat to global food security por Singh, D., Jackson, G., Hunter, D., Fullerton, R., Lebot, V., Taylor, M., Iosefa, T., Okpul, T., Tyson, J.

“…Serious outbreaks of taro leaf blight in Samoa in 1993 and in the last few years in Cameroon, Ghana and Nigeria continue to demonstrate the devastating impact of this disease on the livelihoods and food security of small farmers and rural communities dependent on the crop. …”
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Organic and inorganic fertilizer for vegetable production under tropical conditions por Alimi, T., Ajewole, O.C., Olubode-Awosola, O.O., Idowu, E.O.

“…The use of commercial organic fertilizer is being encouraged in place of inorganic fertilizer in soil fertility improvement in Oyo State of Nigeria. This study was designed to determine if switching to from inorganic to organic fertilizer could be profitable. …”
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Forage legumes for improved fallows in agropastoral systems of subhumid West Africa. III. Nutrient import and export by forage legumes and their rotational effects on subsequent ma... por Muhr, L, Tarawali, Shirley A., Peters, Michael, Schultze-Kraft, Rainer

“…In a short-term improved fallow for crop-livestock farming systems of subhumid west Africa, rotational effects from a range of forage legumes on a subsequent maize crop were studied at two sites in south-west Nigeria. Nutrient (nitrogen, phosphorus and potassium) export from the fallows in the form of dry season herbage and subsequent nutrient accumulation in the green manure biomass were correlated with growth patterns of maize subsequently grown on the legume plots. …”
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Dry season performance of four tropical pasture legumes in subhumid west Africa as influenced by superphosphate application and weed control por Peters, Michael, Tarawali, Shirley A., Alkamper, J.

“…Verano as affected by single superphosphate fertilisation (SSP) and weed control were measured during the dry season in subhumid Nigeria. Wynn, when growing in competition with the native vegetation, had the highest dry matter yields. …”
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Simple sequence repeat marker diversity in cassava landraces: Genetic diversity and differentiation in an asexually propagated crop por Fregene, Martin A., Suarez, MC, Mkumbira, J., Kulembeka, H.P., Ndedya, E, Kulaya, A, Mitchel, S, Gullberg, U., Rosling, H., Dixon, Alfred G.O., Dean, R., Kresovich, Stephen

“…To elucidate genetic diversity and differentiation in the crop's primary and secondary centers of diversity, and the forces shaping them, SSR marker variation was assessed at 67 loci in 283 accessions of cassava landraces from Africa (Tanzania and Nigeria) and the Neotropics (Brazil, Colombia, Peru, Venezuela, Guatemala, Mexico and Argentina). …”
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A second new world hoverfly, toxomerus floralis (Fabricius) (Diptera: Syrphidae), recorded from the old world, with description of larval pollen-feeding ecology por Jordaens, K., Goergen, Georg E., Kirk-Spriggs, A.H., Vokaer, A., Backeljau, T., Meyer, M.D.

“…The species is widespread in Togo, Benin, Nigeria and Cameroon, and eggs, larvae and adults are abundant at several localities. …”
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Evaluating testcross performance and genetic divergence of lines derived from reciprocal tropical maize composites por Menkir, A., Kling, J.G., Anjorin, B., Ladejobi, F., Gedil, Melaku A

“…Thirty-six S4 lines derived from the third RRS cycle of each composite were crossed in pairs to form 36 testcrosses, which were evaluated along with commonly grown commercial hybrids in Nigeria across nine test environments. Results showed consistent ranking of testcrosses for grain yield and other traits across the diverse test environments. …”
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Genetic analysis of gain yield of IITA and CIMMYT earlymaturing maize inbreds under Strigainfested and lowsoil nitrogen environments por Ifie, B.E., Badu-Apraku, Baffour, Gracen, V.E., Danquah, E.Y.

“…Studies were conducted to determine if selection for Striga resistance and/or drought tolerance in early-maturing maize populations improved low-N tolerance in hybrids derived from selected inbreds from International Institute of Tropical Agriculture (IITA) and International Centre for Maize and Wheat Improvement (CIMMYT) under Striga-infested, low-N and optimum environments in Nigeria. One hundred and fifty hybrids developed from crosses involving 30 lines using North Carolina Design II plus six checks were evaluated at two locations each under low-N, artificial Striga infestation, and optimum environments for 2 yr. …”
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Combining ability and genetic diversity of extraearly white maize inbreds under stress and nonstress environments por Badu-Apraku, Baffour, Oyekunle, M., Akinwale, R., Aderounmu, R.O.

“…Diallel crosses involving 17 extra-early white maize inbreds were evaluated under drought, striga, and optimal environments at three locations in Nigeria for 2 yr. The objectives of this study were to estimate general and specific combining ability for grain yield, classify the inbreds into heterotic groups, and identify inbred testers. …”
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Hybrid performance and inbredhybrid relationship of early maturing tropical maize under drought and wellwatered conditions por Oyekunle, M., Badu-Apraku, Baffour

“…Two studies were conducted at three locations in Nigeria for 2 yr to (i) assess performance of 156 early-maturing maize inbreds and three hybrid types and (ii) determine heterosis among the lines and relationship between lines per se and hybrid performance. …”
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Effects of plant density on the performance of cowpea in Nigerian Savannas por Kamara, A., Tofa, A.I., Kyei-Boahen, S., Solomon, R., Ajeigbe, Hakeem A., Kamai, N.

“…Field experiments were conducted to determine plant density effects on cowpea performance in the Northern Guinea and the Sudan savannas of Nigeria and also to determine if genotypes varied in their response to plant density. …”
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Changes in genetic variances and heritabilities in an early white maize population following S1 selection for grain yield, Striga resistance and drought tolerance por Badu-Apraku, Baffour, Oyekunle, M., Talabi, A.O., Annor, B., Akaogu, I.C.

“…In an early white population, 60 S1 families each derived from the base population and three cycles of selection were evaluated under drought and well-watered conditions at two locations in Nigeria for 2 years to determine genetic variability, gains from selection and predict response to selection for grain yield and other traits. …”
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Assessment of reliability of secondary traits in selecting for improved grain yield in drought and lownitrogen environments por Badu-Apraku, Baffour, Akinwale, R., Franco, J., Oyekunle, M.

“…Ninety extraearly inbreds were evaluated for 2 yr at three locations in Nigeria under low N and drought to confi rm reliability of stay green characteristic for selecting for drought tolerance and of ears per plant and anthesis–silking interval for low N. …”
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Correlation and path coefficient analysis of top-cross and three-way cross hybrid maize populations por Sesay, S., Ojo, D.K., Ariyo, O.J., Meseka, S.K., Fayeun, L.S., Omikunle, A.O., Oyetunde, A.O.

“…This study was carried out to reveal the pattern of association with and contribution of traits to grain yield in two maize populations evaluated in three agro-ecological zones of South-Western Nigeria during the 2014 cropping season. The experiment consisted of 10 top-cross and 10 three-way cross maize hybrids, laid out in a randomised complete block design with three replications. …”
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Characterization of yam-growing households in the project areas of Ghana por Mignouna, Djana B., Abdoulaye, Tahirou, Alene, A., Asiedu, Robert, Manyong, Victor M.

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Phosphorus response efficiency in cowpea genotypes por Olaleye, O., Fagbola, O., Abaidoo, Robert C., Ikeorah, N.

“…A screen house experiment was conducted at the International Institute of Tropical Agriculture (IITA) Ibadan, Nigeria. Three hundred cowpea genotypes obtained from the germplasm collection Unit of IITA were screened for number of root whorls and total number of roots using a completely randomized design with 12 replicates. …”
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