Resultados de búsqueda - "marginalism"

Blue Nile flow, sediment and impact of watershed interventions: case of Gumera Watershed por Awulachew, Seleshi Bekele, Tenaw, M., Steenhuis, Tammo S., Easton, Z.M., Ahmed, A., Bashar, K.E.

“…High population pressure, inappropriate agricultural policies, improper land-use planning, over-dependency on agriculture as source of livelihood and extreme dependence on natural resources are inducing deforestation, overgrazing, expansion of agriculture to marginal lands and steep slopes, declining agricultural productivity and resource-use conflicts in many parts of Blue Nile. …”
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Statues quo analysis, characterization and assessment of performance of irrigation in Ethiopia por Awulachew, Seleshi Bekele, Yilma, Aster Denekew

“…It discuses the root cause of poverty and its vicious cycle nature, the interlink of population growth, the scarcity of land and natural resources, the extension of agriculture in to marginal land, the decreasing productivity, inability to invest and deepening of poverty and further aggravation as a result of various shocks such as drought, flood, war, etc. …”
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Improved water and land management in the Ethiopian highlands and its impact on downstream stakeholders dependent on the Blue Nile por Awulachew, Seleshi Bekele, Ahmed, A.A., Haileselassie, A., Yilma, Aster Denekew, Bashar, K.E., McCartney, Matthew P., Steenhuis, Tammo S.

“…Currently, water resources are only marginally exploited in the upper basin but are much more developed in the downstream reaches. …”
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Evaluation of the growth potential of local chickens in Malawi por Gondwe, T.N.P., Wollny, C.B.A.

“…Correlation coefficients of growth traits measured between cage-fed and scavenging conditions were low (r = 0.21-0.53, p<0.05), indicating possible genotype by environment interaction. Gross margin over feed costs was MK26.00 per bird (SD, MK27.00). …”
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Estimating the potential of rainfed agriculture in India: prospects for water productivity improvements por Sharma, Bharat R., Rao, K.V., Vittal, K.P.R., Ramakrishna, Y.S., Amarasinghe, Upali A.

“…Water used in supplemental irrigation had the highest marginal productivity and increase in rainfed production above 12% was achievable even under traditional practices. …”
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Zinc, iron and phytic acid levels of some popular foods consumed by rural children in Sri Lanka por Karunaratne, A.M., Amerasinghe, Priyanie H., Ramanujam, V.M.S., Sandstead, H.H., Perera, P.A.J.

“…These diets could potentially lead to marginal Zn and Fe deficiencies, and dietary diversification and counselling would be beneficial.…”
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Importance of waste stabilization ponds and wastewater irrigation in the generation of vector mosquitoes in Pakistan por Mukhtar, M., Ensink, J., Hoek, W. van der, Amerasinghe, Felix P., Konradsen, Flemming

“…Regular removal of emergent grass along the margins of the anaerobic ponds and changes in the concrete design of the ponds are likely to reduce the mosquito production, especially of Culex species.…”
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Carbon sustainability and productivity of maize based cropping system under conservation agriculture practices in Indo-Gangetic plains por Jat SL, Parihar CM, Singh, A.K., Jat, Mangi Lal, Jat, Kumar Raj

“…Shortage of water, labour and energy resources, together with inappropriate crop management practices and the adverse effects of conventional tillage on the carbon based sustainability index, as well as declining profit margins, are forcing farmers of Indo-Gangetic Plains (IGP) to switch over to conservation agriculture practices. …”
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Cowpea cultivar mixtures for stable and optimal leaf and seed yields in a maize intercropping system por Kabululu, MS, Ojiewo, Christopher Ochieng, Oluoch, M, Maass, Brigitte L.

“…Leaf and grain yields are low and unstable, especially in highly variable climates in marginal areas. A study was conducted to evaluate the impact of cowpea cultivar mixtures on leaf and seed yield and stability in a cowpea–maize (Zea mays L.) intercropping system. …”
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Seroprevalence and risk factors of Coxiella burnetii (Q fever) infection among humans in Bura irrigation scheme, Tana River County, Kenya por Mwololo, D.K., Kitala, P.M., Wanyoike, S.K., Bett, Bernard K.

“…The seroprevalence for CB among adults, children and adolescents was 34.2% (95% CI), 26.8% (95% CI) and 23.2% (95% CI), respectively. There were marginal differences in the seroprevalence of Coxiella burnetii between males and females; these were estimated to be 28% and 26%, respectively. …”
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A reproducible genetic transformation system for cultivated Phaseolus acutifolius (tepary bean) and its use to assess the role of arcelins in resistance to the Mexican bean weevil por Zambre, M, Goossens, A, Cardona Mejía, César, Montagu, M. van, Terryn, N, Angenon, G

“…Transgenic beans from two different cultivated P. acutifolius genotypes with high arcelin levels were infested with Z. subfasciatus, but they were only marginally less susceptible to infestation than the non-transgenic P. acutifolius. …”
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Organic and mineral input management to enhance crop productivity in Central Kenya por Chivenge, Pauline P., Vanlauwe, Bernard, Gentile, R, Wangechi, HK, Mugendi, DN, Kessel, Chris van, Six, Johan

“…Although N fertilizer additions to the ORs improved grain yields in Embu, the increase was marginal; resulting in negative interactive effects of applying ORs with N fertilizers, especially with high‐N ORs. …”
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Local conventions governing community participation in the decentralized management of natural resources: Case study of mixed crop-livestock systems in the Sudano-Sahelian zone of... por Umutoni, Clarisse

“…Women were essentially marginalized in the elaboration process and implementation of local conventions compared to men. …”
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Market chain analysis of honey production in Atsbi Wemberta district, Eastern Zone of Tigray National Regional State por Abebe, A.

“…The honey marketing performance was also measured using marketing margins complemented with analysis of costs and gross profits generated by different marketing channel actors. …”
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Quality and safety improvements in informal milk markets and implications for food safety policy por Lapar, Ma. Lucila, Deka, Ram Pratim, Lindahl, Johanna F., Grace, Delia

“…Estimates of economic benefits show positive effects in terms of increased average profit margins and value added. Sector level benefits as approximated from micro-level estimates of economic indicators show that traditional dairy value chain in Kamrup generates about 0.8 million rupees value added per day; this translates to an annual estimate of economic impact in Kamrup of at least US$ 5.6 million. …”
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Spatial evapotranspiration, rainfall and land use data in water accounting - part 2: reliability of water accounting results for policy decisions in the Awash Basin por Karimi, P., Bastiaanssen, Wim G.M., Sood, A., Bastidas-Obando, E., Dost, R.

“…The results of the Awash Basin also indicate that the utilized flow and basin closure fraction (the degree to which available water in a basin is utilized) have a high margin of error and thus a low reliability. As such, the usefulness of them in formulating important policy decisions for the Awash Basin is limited. …”
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Participatory breeding in the Peruvian highlands: opportunities and challenges for promoting conservation and sustainable use of underutilized crops por Galluzzi, Gea, Estrada, R.D., Apaza, V., Gamarra, M., Pérez, A., Gamarra, G., Altamirano, A., Caceres, G., Gonza, V., Sevilla, R., López Noriega, Isabel, Jager, M.

“…While high genetic variability allows these crops to adapt to marginal environments, inappropriate management practices and reductions in population sizes in individual farmers’ plots may lead to productivity loss and poor harvests. …”
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Forage quality of shrub legumes evaluated in acid soils por Lascano Aguilar, Carlos Eduardo, Maass, Brigitte L., Keller-Grein, Gerhard

“…The forage quality of shrub legume species planted in acid soils of the llanos and forest margins of Colombia was evaluated by the Tropical Forages Program (TFP) of CIAT. …”
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Nutrient composition of pastures in Kayunga District, Uganda: A preliminary investigation with implications for seasonal supplementation in grazing Ruminants por Dierenfeld, E.S., Lukuyu, Ben A., Nyagaka, D.

“…Sodium was deficient in these pastures, whereas Ca, P, Mg, S, Cu, and Zn concentrations may have been only marginally sufficient, particularly to meet needs for lactation, dependent on season. …”
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Decentralized participatory plant breeding por Ceccarelli, Salvatore, Grando, Stefania

“…These advantages are particularly relevant to developing countries where large investments in plant breeding have not resulted in production increases, especially in marginal environments.…”
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