Resultados de búsqueda - "Ethiopia"

Maize Lethal Necrosis (MLN), an emerging threat to maize-based food security in sub-Saharan Africa por Mahuku, George S., Lockhart, B.E.L., Wanjala, Bramwel W., Jones, M., Kimunye, J.N., Stewart, L.R., Cassone, B.J., Sevgan, S., Nyasani, J.O., Kusia, E., Kumar, P. Lava, Niblett, C.L., Kiggundu, A., Asea, G., Pappu, H.R., Wangai, A., Boddupalli, P.M., Redinbaugh, M.G.

“…The disease has since been confirmed in Rwanda and the Democratic Republic of Congo, and similar symptoms have been reported in Tanzania, Uganda, South Sudan, and Ethiopia. In 2012, yield losses of up to 90% resulted in an estimated grain loss of 126,000 metric tons valued at $52 million in Kenya alone. …”
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Impact of tillage type and soil texture to soil organic carbon storage: The case of Ethiopian smallholder farms por Alemayehu, N., Masafu, M.M., Ebro, A., Tegegne, Azage

“…However, there is limited information on soil organic carbon storage due to influence of tillage type and soil texture under smallholder production systems in Ethiopia. The objective of this study was therefore to quantify soil organic carbon in different soil textures and tillage types; and to the contribution of livestock in improving soil carbon, soil structure and soil fertility. …”
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Effect of bias correction of satellite-rainfall estimates on runoff simulations at the source of the Upper Blue Nile por Habib, E., Haile, Alemseged Tamiru, Sazib, N., Zhang, Y., Rientjes, T.H.M.

“…The study area is the Gilgel Abbay catchment situated at the source basin of the Upper Blue Nile basin in Ethiopia, Eastern Africa. Rain gauge networks in such area are typically sparse. …”
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Accuracy of the CMORPH satellite-rainfall product over Lake Tana Basin in eastern Africa por Haile, Alemseged Tamiru, Yan, F., Habib, E.

“…In this study, we assessed the accuracy of rainfall occurrence, amount and distribution over the Lake Tana basin in Ethiopia, Eastern Africa, as represented in the NOAA satellite-based Climate Prediction Center Morphing technique (CMORPH) rainfall product. …”
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Interdependence in rainwater management technologies: an analysis of rainwater management adoption in the Blue Nile Basin por Gebregziabher, Gebrehaweria, Rebelo, Lisa-Maria, Langan, Simon J.

“…Over the past two decades, however, the Government of Ethiopia has attempted to address many of these issues through a large-scale implementation of a number of soil and water conservation measures. …”
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Antimicrobial use in African agriculture and its implications por Grace, Delia, Lindahl, Johanna F., Hung Nguyen-Viet, Unger, Fred, Robinson, Timothy P.

“…We present a review of antimicrobial use and surveillance in east African agriculture along recent case studies from free-range pig systems in Uganda; dairy in Kenya, and pastoral small ruminant systems in Ethiopia. We discuss how differing systems are associated with differing patterns of AMR. …”
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Evaluation of bias correction method for satellite-based rainfall data por Bhatti, H.A., Rientjes, T.H.M., Haile, Alemseged Tamiru, Habib, E., Verhoef, W.

“…In this study, we tested the high resolution National Oceanic and Atmospheric Administration’s (NOAA) Climate Prediction Centre (CPC) morphing technique (CMORPH) satellite rainfall product (CMORPH) in the Gilgel Abbey catchment, Ethiopia. CMORPH data at 8 km-30 min resolution is aggregated to daily to match in-situ observations for the period 2003–2010. …”
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Improving adaptation to drought stress in white pea bean (Phaseolus vulgaris L.): Genotypic effects on grain yield, yield components and pod harvest index por Assefa, Teshale, Rao, Idupulapati M., Cannon, Steven B., Wu, Jixiang, Gutema, Zenbaba, Blair, Matthew W., Otyama, Paul, Alemayehu, Fitsume, Dagne, Belete

“…In all, 35 advanced lines were developed through single seed descent and evaluated with a standard check under drought and irrigated conditions at two locations over 2 years in Ethiopia. Grain yield (GY), pod number per m2, seed number per m2 and seed weight decreased by 56%, 47%, 49% and 14%, respectively, under drought stress. …”
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Land use and land cover dynamics in Dendi-Jeldu hilly-mountainous areas in the central Ethiopian highlands por Minta, M., Kibret, K., Thorne, Peter J., Nigussie, T., Nigatu, L.

“…This study was aimed to define the rate and pattern of LULC changes in Dendi-Jeldu hilly-mountainous areas in the central Ethiopia. Aerial photographs of years 1957 and 1995, and Landsat images taken at 1995 and 2014 were used to analyze the historical land use and land cover (LULC) changes. …”
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Impediments to new improved maize variety testing and release in selected countries in sub-Saharan Africa por Setimela, P.S., Badu-Apraku, Baffour, Mwangi, W.

“…A survey was conducted on the varietaltesting and release systems in 14 selected countries (Angola, Benin, Ethiopia, Malawi, Ghana, Mali, Mozambique, Nigeria, Tanzania, Kenya, South Africa, Uganda, Zambia, and Zimbabwe) in SSA. …”
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Groundwater quality in an upland agricultural watershed in the sub-humid Ethiopian Highlands por Akal, Adugnaw T., Dagnew, D.C., Giri, S., Belete, M.A., Tilahun, Seifu A., Mekuria, Wolde, Steenhuis, Tammo S.

“…In most of these countries such as Ethiopia, information on surface and especially groundwater quality is lacking. …”
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Impact of soil depth and topography on the effectiveness of conservation practices on discharge and soil loss in the Ethiopian Highlands por Akal, Adugnaw T., Dagnew, D.C., Belete, M.A., Tilahun, Seifu A., Mekuria, Wolde, Steenhuis, Tammo S.

“…Precipitation, discharge, and sediment concentration were measured from 2010 to 2012 in two watersheds in close proximity and located in the Lake Tana basin, Ethiopia: Tikur-Wuha and Guale watersheds. The Tikur-Wuha watershed has deep soils and a gentle slope stream channel. …”
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Long-term livestock exclosure did not affect soil carbon in southern Ethiopian rangelands por Aynekulu, Ermias, Mekuria, Wolde, Tsegaye, D., Feyissa, K., Angassa, A., Leeuw, Jan de, Shepherd, Keith D.

“…We investigated the effectiveness of long-term (14–36 years old) exclosures in enhancing soil carbon in the semiarid savanna, southern Ethiopia. We tested for differences in soil carbon content between exclosures and adjacent open-grazed rangelands, while accounting for effects of age of exclosures and soil depths. …”
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Climate variability, perceptions of pastoralists and their adaptation strategies: Implications for livestock system and diseases in Borana zone por Ayal, Desalegn Y., Radeny, Maren A.O., Desta, Solomon, Gebru, Getachew

“…This paper aims to examine climate variability and its impact on livestock system and livestock disease among pastoralists in Borana, Southern Ethiopia. Design/methodology/approach: Data were collected through a combination of quantitative and qualitative methods using household questionnaire, field observations, focus group discussions and key informant interviews. …”
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Suitability mapping framework for solar photovoltaic pumps for smallholder farmers in sub-Saharan Africa por Schmitter, Petra S., Kibret, K.S., Lefore, Nicole, Barron, Jennie

“…This study developed a suitability framework using multi-criteria analysis in an open source GIS environment and tested it in the case of Ethiopia. Theaccessibilityofwaterresourceswasthedrivingfactorfordi erentscenarios.Suitabilityresultsfollowingthe groundwater scenarios showed good agreement with the available referenced well depth data. …”
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Development and Dissemination of Integrated Crop Management (ICM) Technologies for Management of Biotic and Abiotic Stresses affecting Common bean in PABRA por Abang, Mathew M., Chirwa, Rowland, Rubyogo, Jean-Claude, Mukankusi, Clare Mugisha

“…The combined use of new stress tolerant varieties and improved crop management practices led to yield increases of 65% (Ethiopia) to 400% (DR Congo). The two-pronged approach led to the delivery of ICM technologies to 4.9 million farmers during 2009 – 2011. …”
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Variations in mitochondrial cytochrome b region among Ethiopian indigenous cattle populations assert Bos taurus maternal origin and historical dynamics por Tarekegn, G.M., Xiao-yang Ji, Xue Bai, Bin Liu, Wenguang Zhang, Birungi, Josephine, Djikeng, Appolinaire, Tesfaye, K.

“…Objective This study was carried out to assess the haplotype diversity and population dynamics in cattle populations of Ethiopia. Methods We sequenced the complete mitochondrial cytochrome b gene of 76 animals from five indigenous and one Holstein Friesianà Barka cross bred cattle populations. …”
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East Africa Soil Carbon Workshop: Science to inform policy por Nyawira, Sylvia Sarah, Sommer, Rolf

“…The East Africa Soil Carbon Workshop – Science to Inform Policy brought together 28 participants from 11 countries: Ethiopia, Kenya, Uganda, Rwanda, Tanzania, South Africa, Madagascar, Germany, France, Netherlands, and Sweden (10 women and 18 men). …”
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Current situation of rapid multiplication techniques for early generation seed potato production in Sub-Saharan Africa por Harahagazwe, D., Andrade-Piedra, J.L., Parker, M., Schulte-Geldermann, Elmar

“…The survey was conducted in seven SSA countries (Burundi, Ethiopia, Kenya, Malawi, Rwanda, Tanzania, and Uganda) from November to December 2017. …”
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Selecting for food-feed traits in desi and kabuli genotypes of Chickpea (Cicer arietinum) por Wamatu, Jane, Alemu, Tena, Tolera, Adugna, Beyan, Mohammed, Alkhtib, Ashraf, Eshete, Million, Ahmed, Seid, Rischkowsky, Barbara A.

“…The study explored the genetic and environmental variability in chickpea for food-feed traits.Seventy nine genotypes of 17 early-maturing desi genotypes, 19 early-maturing kabuli genotypes and 43 latematuring kabuli genotypes were evaluated for food-feed traits in 7 trials laid out in a randomized complete block design in 3 locations in Ethiopia.All trials showed wide genotypic ranges in various traits related to grain yield, straw yield and straw quality.Analysis of variance for individual trials showed significant (P<0.05)effects of genotype, location and their interaction on grain and straw yields, CP, IVOMD and NDF in all populations.Correlation analysis exhibited either positive or insignificant correlations with straw yield in all trials.The correlation between IVOMD and grain yield was insignificant in all trials.Grain yield correlated significantly (P<0.001) and positively to NDF in early maturing kabuli, however, the correlation was moderate (r= 0.396).Grain yield correlated either weakly or insignificantly to CP and Ca in the trials.The correlation between P and grain yield was ignored as the straw content of P was very small in all genotypes (<1.78 g/kg).Weak or absence of correlations between grain yields with straw traits would enable chickpea breeders to manipulate grain yield and straw traits independently.This presents an opportunity to identify parental genotypes for improving grain yield and straw traits for individual locations.…”
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