Resultados de búsqueda - "Chang’an"

Thriving against the odds through positive deviant behavior: technology adoption and entrepreneurship among dairy farmers in Addis Ababa and Oromia in Ethiopia por Nyokabi, N., Gemechu, G., Phelan, L., Lindahl, Johanna F., Mihret, A., Berg, S., Wood, J.L.N., Moore, H.L.

“…We observed that PD dairy farmers had adopted and/or modified a variety of technologies to overcome context-specific challenges faced, such as seasonal feed shortages exacerbated by climate change, reduced land size and availability of land for grazing and waste disposal, and restrictions on farming resulting from the development of urban areas. …”
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Location and uptake: integrated household and GIS analysis of technology adoption and land use, with application to smallholder dairy farms in Kenya por Staal, Steven J., Baltenweck, Isabelle, Waithaka, M.M., Wolff, T. de, Njoroge, L.

“…Comparisons are made with estimations based only on survey data, which demonstrate that while overall explanatory power may not improve with GIS-derived variables, the latter yield more practical interpretations, which is further demonstrated through predictions of technology uptake change with a shift in infrastructure policy. Although requiring large geo-referenced data sets and high resolution GIS layers, the methodology demonstrates the potential to better unravel the multiple effects of location on farmer decisions on technology and land use.…”
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Biodiversity and local perceptions on the edge of a conservation area, Khe Tran Village, Vietnam por Boissiere, M., Basuki, I., Koponen, P., Wan, M., Sheil, Douglas

“…The driving force in this area has been different land use policies, resulting mainly from a government ‘top down’ approach, and the consequent changes in local forest status. The major activities for local livelihoods have shifted from swidden agriculture and high dependency on natural forests, to more sedentary activities. …”
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Combining napier grass with leguminous shrubs in contour hedgerows controls soil erosion without competing with crops por Mutegi, J.K., Mugendi, D.N., Verchot, Louis V., Kung'u, J.B.

“…Hedge plots were monitored for soil fertility, soil losses and maize crop yield changes. Inorganic-N concentration in the tree hedge plots was higher than in the control and napier barrier plots after 20 months. …”
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Conservation of soil organic carbon, biodiversity and the provision of other ecosystem services along climatic gradients in West Africa por Marks, E., Aflakpui, G.K.S., Nkem, J., Poch, R.M., Khouma, M., Kokou, K., Sagoe, R., Sebasti`a, M.T.

“…Climate risks must be considered in a framework of global change, especially in West Africa, where landscape managers have few resources available to adapt to climatic perturbations. …”
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Hydrological modelling of a catchment using the SWAT model in the upper Blue Nile basin of Ethiopia por Taffese, T., Zemadim, Birhanu

“…The results indicate that the model performance was in acceptable range and there are no many changes to predict the flow by the two versions of SWAT model. …”
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Post-harvest food losses in a maize-based farming system of semi-arid savannah area of Tanzania por Abass, A., Ndunguru, G., Mamiro, P., Alenkhe, B., Mlingi, N., Bekunda, Mateete A.

“…Most of the farmers considered changes in weather (40%), field damage (33%), and storage pests (16%) as the three most important factors causing poor crop yields and aggravating food losses. …”
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Crossbreeding and intensification of smallholder crop-cattle farming systems in Bhutan por Samdupa, T., Udo, H.M.J., Eilers, C.H.A.M., Ibrahim, Mohamed N.M., Zijpp, A.J. van der

“…Herd composition on the study farms reflected the policy of promotion of crossbreds in areas with suitable agro-ecological conditions, as well as the preferences of the farmers and their cultural values. The change in livestock breeding policy in 1998 had no apparent impact on the breed composition of the herds. …”
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Mapping genetic diversity of Cherimoya (Annona cherimola Mill.): application of spatial analysis for conservation and use of plant genetic resources por Zonneveld, M. van, Scheldeman, Xavier, Escribano, P., Viruel, M.A., Damme, Patrick van, García, W., Tapia, C., Romero, J., Siguenas, M., Hormaza, J.I.

“…Diversity is also crucial for species to adapt to environmental changes. This paper explores the possibilities of incorporating molecular marker data into Geographic Information Systems (GIS) to allow visualization and better understanding of spatial patterns of genetic diversity as a key input to optimize conservation and use of plant genetic resources, based on a case study of cherimoya (Annona cherimola Mill.), a Neotropical fruit tree species. …”
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Basin-wide water accounting based on remote sensing data: an application for the Indus Basin por Karimi, Poolad, Bastiaanssen, Wim G.M., Molden, David J., Cheema, Muhammad Jehanzeb Masud

“…The paper demonstrates the application of a new water accounting plus (WA+) framework to produce information on depletion of water resources, storage change, and land and water productivity in the Indus basin. …”
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Impact of soil and water conservation measures on catchment hydrological response: a case in north Ethiopia por Nyssen, Jan, Clymans, W., Descheemaeker, Katrien K., Poesen, J., Vandecasteele, I., Vanmaercke, M., Zenebe, A., Camp, M. van, Haile, M., Haregeweyn, Nigussie, Moeyersons, J., Martens, K., Gebreyohannes, T., Deckers, J., Walraevens, K.

“…Impact studies of catchment management in the developing world rarely include detailed hydrological components. Here, changes in the hydrological response of a 200-ha catchment in north Ethiopia are investigated. …”
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The top 100 questions of importance to the future of global agriculture por Pretty, Jules N., Sutherland, W.J., Ashby, Jacqueline A., Auburn, J., Baulcombe, D.C., Bell, M., Bentley, J.W., Bickersteth, S., Brown, K., Burke, J., Campbell, H., Chen, Kevin Z., Crowley, E.L., Crute, I., Dobbelaere, D.A.E., Edwards-Jones, G., Funes-Monzote, F., Godfray, H. Charles J., Griffon, M., Gypmantisiri, P., Haddad, Lawrence, Halavatau, S., Herren, H., Holderness, M., Izac, A.M.N., Jones, M., Koohafkan, P., Lal, R., Lang, T., McNeely, J., Mueller, A., Nisbett, N., Noble, A.D., Pingali, Prabhu L., Pinto, Y., Rabbinge, Rudy, Ravindranath, N.H., Rola, A., Roling, N., Sage, C., Settle, W., Sha, J.M., Shiming, L., Simons, T., Smith, Pete, Strzepek, Kenneth M., Swaine, H., Terry, Eugene R., Tomich, Thomas P., Toulmin, C., Trigo, Eduardo, Twomlow, Stephen, Vis, J.K., Wilson, J., Pilgrim, S.

“…To meet the expected demand for food without significant increases in prices, it has been estimated that we need to produce 70-100 per cent more food, in light of the growing impacts of climate change, concerns over energy security, regional dietary shifts and the Millennium Development target of halving world poverty and hunger by 2015. …”
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The challenges of wastewater irrigation in developing countries por Qadir, Manzoor, Wichelns, Dennis, Raschid-Sally, Liqa, McCornick, Peter G., Drechsel, Pay, Bahri, Akissa, Minhas, P.S.

“…The WHO guidelines revised in 2006 for wastewater use suggest measures beyond the traditional recommendations of producing only industrial or non-edible crops, as in many situations it is impossible to enforce a change in the current cash crop pattern, or provide alternative vegetable supply to urban markets. …”
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Hydraulic redistribution by two semi-arid shrub species: implications for Sahelian agro-ecosystems por Kizito, Fred, Dragila, M.I., Sene, M., Brooks, J.R., Meinzer, F.C., Diedhiou, I., Diouf, M., Lufafa, A., Dick, R.P., Selker, J., Cuenca, R.

“…Soil water potential (Js) at the 20 cm depth declined significantly during the dry season with diel changes in Js of 0.6 to 1.1 MPa. These variations were attributed to passive water release from shrub roots resulting in overnight rewetting of drier upper soil layers. …”
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Speciation and long- and short-term molecular-level dynamics of soil organic sulfur studied by X-ray absorption near-edge structure spectroscopy por Solomon, D., Lehmann J, Knoth de Zarruk, K., Dathe, J., Kinyangi, James, Liang B, Machado S

“…We investigated speciation, oxidative state changes, and long- and short-term molecular-level dynamics of organic S after 365 d of aerobic incubation with and without the addition of sugarcane residue using XANES spectroscopy. …”
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Lifetime under-nutrition and lactation performance of Zebu and Zebu x Holstein cows in the tropics por Jenet, A., Tegegne, Azage, Osuji, P.O., Yimegnuhal, A., Kreuzer, M., McCrabb, G.J., Fernández Rivera, S.

“…However, the effect of feeding level on weight changes during the lactation was not significant. …”
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Contribution of grazing to soil atmosphere CH4 exchange during the growing season in a continental steppe por Tang S, Wang C, Wilkes, Andreas, Zhou P, Jiang Y, Han, G., Zhao M, Huang D, Schönbach, P.

“…Light grazing (LG) of steppe did not significantly change CH4 uptake compared with un-grazed (UG) steppe, but moderate and heavy grazing (MG, HG) reduced CH4 uptake significantly (by 6.8–37.9%, P < 0.05). …”
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Soil organic matter in oxisols of the Brazilian cerrados por Neufeldt, Henry, Resck, DVS, Ayarza, Miguel Angel, Zech, W.

“…We assessed soil organic carbon (SOC), polysaccharides, and CuO oxidation products (VSC-lignin). Few changes were found in SOC contents of topsoil (0-12 cm) under different land uses after 10-20 years. …”
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Acid monophosphatase: an indicator of phosphorus mineralization or of microbial activity? A case study from the Brazilian cerrados por Renz, TE, Neufeldt, Henry, Ayarza, Miguel Angel, Silva, J.E. da, Zech, W.

“…In the clayey soil, pastures seemed to have a positive effect on phosphatase activity. A change of continuous cropping to pasture resulted in a rapid recovery of phosphatase activity, microbial activity, and C and N levels. …”
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Genetic parameters and correlated responses in female reproductive traits in the GIFT strain por Hamzah, A., Nguyen Hong Nguyen, Mekkawy, Wagdy, Hooi Ling Khaw, Hoong Yip Yee, Abu Bakar, Khairul Rizal, Ponzoni, R.W., Mohd Nor, S.A.

“…This indicates that the greater reproductive rate was due to the greater size of females in the Selection line, but the efficiency of reproduction per unit weight of female did not change as a consequence of selection for growth.…”
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