Resultados de búsqueda - "Chang’an"

Characterization of yam-growing households in the project areas of Ghana por Mignouna, Djana B., Abdoulaye, Tahirou, Alene, A., Asiedu, Robert, Manyong, Victor M.

“…The baseline studies aimed at understanding farmers’ livelihoods in yam growing areas to increase agricultural productivity in Ghana, and serve also as benchmarks to assess changes brought about by the YIIFSWA project in future. …”
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Characterization of yam-growing households in the project areas of Nigeria por Mignouna, Djana B., Abdoulaye, Tahirou, Alene, A., Asiedu, Robert, Manyong, Victor M.

“…The baseline studies aimed at understanding farmers’ livelihoods in yam-growing areas to increase agricultural productivity in Nigeria and also to serve as benchmarks to assess changes brought about by the YIIFSWA project in future. …”
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Assessment of lifetime performance of small ruminants under different feeding systems por Amole, Tunde A., Zijlstra, M., Descheemaeker, Katrien K., Ayantunde, Augustine A., Duncan, Alan J.

“…Modifications were made to the current version of Livestock Simulator developed for cattle production to simulate goat production systems particularly for WAD goats. Effects of changes in input parameters (quality of feed and potential adult weight) confirmed the sensitivity of the modelled weight development and reproductive performance. …”
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Organic matter availability and management in the context of integrated soil fertility management in sub-Saharan Africa por Vanlauwe, Bernard

“…After a summary of the role of organic resources in tropical soil fertility management as affected by changing paradigms, the organic resource quality concept is introduced and important observations regarding the current availability and use of organic inputs in African smallholder farming systems are highlighted. …”
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Genetic conservation in Parkia biglobosa (Fabaceae: Mimosoideae) - what do we know? por Lompo, D.J.-P., Vinceti, B., Gaisberger, H., Konrad, H., Duminil, J., Ouédraogo, M., Sina, S., Geburek, T.

“…In the light of climatic changes, safeguarding the genetic diversity of the species is crucial to foster adaptation and to support its long-term survival. …”
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Institutional aspects of sanitary and phytosanitary issues in ECOWAS trade por Hughes, J., Bandyopadhyay, Ranajit, Makinde, K., Olembo, S.

“…SPS focal points are not established in all countries, which makes it difficult for exporters to check on standards and requirements. Frequent changes to standards, excessive procedural requirements, high costs for testing and certification, and a lack of transparency in the application of standards combine to compromise the ability of many countries to comply effectively with SPS. …”
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Greenmaize potential of hybrid and openpollinated cultivars at varying levels of applied nitrogen: relationship with grain yield por Kim, S.K., Adetimirin, Victor O., Yoon, S.T., Adepoju, A., Gbadamosi, B.A.

“…Green-maize traits and grain yields showed different responses to increased nitrogen fertiliser application: grain yield was significantly greater at 120 kg ha−1 than at 60 kg ha−1 whereas marketable-ear yield was not significantly changed by the higher rate. The hybrids showed higher green-maize and grain yield responses than the OPs to fertiliser application. …”
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Sweetpotato (Ipomoea batatas L.) por Mwanga, Robert O.M., Andrade, M.I., Carey, E.E., Low, Jan W., Yencho, George Craig, Grüneberg, W.J.

“…However, during the last decade, this perception has changed, and it is widely acknowledged that sweet potato has great potential to contribute to the alleviation of malnutrition and hunger in the developing world. …”
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Genome-wide association mapping and genomic prediction for CBSD resistance in Manihot esculenta por Kayondo, S.I., Carpio, D.P. del, Lozano, R., Ozimati, A.A., Wolfe, M., Baguma, Yona K., Gracen, V., Offei, S., Ferguson, Morag E., Kawuki, R.S., Jannink, Jean-Luc

“…Motivated by the slow progress of conventional breeding, genetic improvement of cassava is undergoing rapid change due to the implementation of quantitative trait loci mapping, Genome-wide association mapping (GWAS), and genomic selection (GS). …”
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Biological control in Africa and its possible effects on biodiversity por Neuenschwander, Peter, Markham, R.

“…Biological control efforts in tropical Africa have been most often directed at invading exotic species and are conducted in rapidly changing landscapes, in which the flora, fauna and ecological interactions are imperfectly known. …”
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Analysis of yam yields using the additive main effects and multiplicative interaction (AMMI) model por Egesi, Chiedozie N., Asiedu, Robert

“…Within environments, AMMI1 estimates ranked genotypes differently from the unadjusted means, and in six out of nine cases AMMI1 estimates changed the top-yielding entry. The AMMI1 estimation also produced sharper and stratified rankings compared with the unadjusted means. …”
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Population dynamics of the cashew leafminer, Eteoryctis gemoniella (Lepidoptera: Gracillariidae), and inventory of its parasitoids in cashew orchards of Northern Benin, West Africa por Agboton, C., Onzo, A., Akohou, H.A., Goergen, Georg E., Vidal, S., Tamò, Manuele

“…This study was carried out in three different cashew orchards in Northern Benin, West Africa, where we monitored the fluctuations of the infestation rates and population changes of E. gemoniella during a one-year cycle, from September 2010 to August 2011. …”
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Forest cover mapping in post-Soviet Central Asia using multi-resolution remote sensing imagery por He, Y., Pflugmacher, D., Martius, C.

“…In comparison to the CAFC map, a regional map derived from MODIS Vegetation Continuous Fields tended to underestimate forest cover, while the Global Forest Change product matched well. The Global Forest Resources Assessments, based on individual country reports, overestimated forest cover by 1.5 to 147 times, particularly in the more arid countries of Turkmenistan and Uzbekistan. …”
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Above-ground biomass and structure of 260 African tropical forests por Lewis, S.L., Sonke, B., Sunderland, Terry C.H., Begne, S.K., López Gonzalez, G., Heijden, G.M.F. van der, Phillips, Oliver L., Affum-Baffoe, K., Baker, T.R., Banin, Lindsay F., Bastin, J.F., Beeckman, H., Bogaert, J., Cannière, C. de, Chezeaux, E., Clark, C.J., Collins, M., Djagbletey, G, Djuikouo Kamden, Marie Noel, Droissart, V., Doucet, J.L., Ewango, C.E.N., Fauset, S, Feldpausch, T.R., Foli, E.G., Gillet, J.F., Hamilton, A.C., Harris, D.J., Hart, T.B., Haulleville, T. de, Hladik, A, Hufkens, K, Huygens, D., Jeanmart, P., Jeffery, K.J., Kearsley, E., Leal, M.E., Lloyd, J., Lovett, J.C., Makana, J.R., Malhi, Y, Marshall, A.R., Ojo, L.O., Peh, K.S.H., Pickavance, G, Poulsen, J.R., Reitsma, J.M., Sheil, D., Simo, M, Steppe, K, Taedoumg, H.E., Talbot, J, Taplin, J. R. D, Taylor, D, Thomas, S.C., Toirambe, B., Verbeeck, H., Vleminckx, J., White, Lee J.T., Willcock, S, Woell, H., Zemagho, Lise

“…The results indicate that AGB is mediated by both climate and soils, and suggest that the AGB of African closed-canopy tropical forests may be particularly sensitive to future precipitation and temperature changes.…”
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Agriculture beyond the oil palm development in Jambi province Participatory Prospective Analysis por Mienmany, S.

“…The growth of oil palm has open a debate between conservation and development: some see palm oil as an alternative resource for the mitigation of climate change and for the improvement of people's livelihood. …”
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Economic valuation of land uses in Oudomxay Province, Lao PDR: Can REDD+ be effective in maintaining forests? por Wong, Grace Y., Darachantara, S, Soukkhamthat, T.

“…By comparison, the traditional land uses studied (upland rice farming and non-timber forest products collecting) are largely subsistence activities that are still considered as sustainable, though this is increasingly affected by changing market and population dynamics. The results suggest that longer-term environmental costs can potentially cancel out short-term gains from the commercialization to mono-crop agriculture. …”
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Mixing carrots and sticks to conserve forests in the Brazilian Amazon: a spatial probabilistic modeling approach por Börner, J., Marinho, E., Wunder, Sven

“…Mounting empirical evidence suggests that changes in Brazilian law enforcement strategy and the related governance system may account for a large share of the overall success in curbing deforestation rates. …”
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Futures of tropical forests (sensu lato) por Putz, F.E., Romero, C.

“…With management intensification, climate change, species introductions, landscape fragmentation, fire, and shifts in economics and governance, forests will vary along gradients of biodiversity, novelty of composition, stature, permanence, and the relative roles of natural and anthropogenic forces. …”
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Why does air passage over forest yield more rain?: examining the coupling between rainfall, pressure and atmospheric moisture content por Makarieva, A.M., Gorshkov, V.G, Sheil, D., Nobre, A.D, Bunyard, P, Li, B.L.

“…Here methodological problems are identified with the underlying analyses and the quantitative estimates for rainfall change predicted if forest cover is lost in the Amazon. …”
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Export-oriented deforestation in Mato Grosso: harbinger or exception for other tropical forests? por Fries, R.S. de, Herold, Martin, Verchot, Louis V., Macedo, M.N, Shimabukuro, Y.

“…Results suggest that the ecological, hydrological and social consequences of land-use change for export-oriented agriculture as discussed in this Theme Issue were applicable in about one-third of all tropical forest countries in 2000–2005. …”
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