Resultados de búsqueda - Repsol~

Markets and climate are driving rapid change in farming practices in Savannah West Africa por Ouédraogo, Mathieu, Zougmoré, Robert B., Moussa, Abdoulaye S., Partey, Samuel T., Thornton, Philip K., Kristjanson, Patricia M., Badiane Ndour, Ndèye Yacine, Somé, Léopold, Naab, Jesse B., Boureima, Moussa, Diakite, L., Quirós, Carlos F.

“…A series of logit models showed that most changes farmers made to their practices are undertaken for multiple reasons. Land use and management changes including expanding farmed areas and using mineral fertilization and manure are positively related to perceived changes in the climate, such as more erratic rainfall. …”
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Household opportunity costs of protecting and developing forest lands in Son La and Hoa Binh Provinces, Vietnam por Lan, Le Ngoc, Wichelns, Dennis, Milan, Florence M., Hoanh, Chu Thai, Duy Phuong, Nguyen

“…The pilot program implemented in southern Vietnam seems to be successful, yet the program in northern Vietnam has not produced the desired rates of planting and maintaining forest areas. The reasons for these mixed results include differences in socio-economic characteristics and also the production and marketing opportunities available to rural households in the project areas. …”
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From best fit technologies to best fit scaling: incorporating and evaluating factors affecting the adoption of grain legumes in Sub-Saharan Africa por Farrow, Andrew, Ronner, E., Brand, G. van den, Boahen, S., Leonardo, W., Woldemeskel, Endalkachew, Adjei-Nsiah, Samuel, Chikowo, Regis, Baijukya, Frederick P., Ebanyat, Peter, Sangodele, S., Sanginga, J.M., Kantengwa, S., Phiphira, L., Woomer, P.L., Ampadu-Boakye, T., Baars, E., Kanampiu, F.K., Vanlauwe, Bernard, Giller, Kenneth E.

“…Our implementation of this design has only been partially successful because of competing reasons for selecting activity sites. Nevertheless, we observe that grain legume species have been successfully targeted for multiple biophysical environments across sub-Saharan Africa, and to social and economic contexts within countries. …”
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Social network analysis of multi-stakeholder platforms in agricultural research for development: opportunities and constraints for innovation and scaling por Hermans, Frans, Sartas, Murat, Schagen, Boudy van, Asten, Piet J.A. van, Schut, Marc

“…The objective of this paper is to explore the capacity to innovate and scaling potential of three MSPs in Burundi, Rwanda and the South Kivu province located in the eastern part of Democratic Republic of Congo (DRC). In order to do this, we apply Social Network Analysis and Exponential Random Graph Modelling (ERGM) to investigate the structural properties of the collaborative, knowledge exchange and influence networks of these MSPs and compared them against value propositions derived from the innovation network literature. …”
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Uptake of Climate-Smart Agriculture Through a Gendered Intersectionality Lens: Experiences from Western Kenya por Mungai, Catherine, Opondo, Maggie, Outa, George, Nelson, Valerie, Nyasimi, Mary, Kimeli, Philip

“…Results from a quantitative survey undertaken with 51 farmers and from 4 focused group discussions held with 33 farmers (19 males and 14 females) indicate that 85% of the respondents are willing to adopt climate-smart agriculture (CSA) interventions if constraining factors are resolved.This study reveals that farmers, regardless of whether they are male or female, are willing to adopt climate smart technologies and practices. …”
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Gamification of farmer-participatory priority setting in plant breeding: Design and validation of “AgroDuos” por Steinke, Jonathan, Etten, Jacob van

“…Challenges persist concerning local adaptation and data analysis by non-specialist staff, which may be resolved in the future by providing templates and online support.…”
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Farmer participatory research in soil management in Indonesia por Utomo, Wani Hadi, Suyamto, H., Santoso, H., Sinaga, A.

“…Most of the existing management technologies that have been developed have had little success in adoption. Some of the reasons are that the technology developed is technically oriented, based on experiment station research with very little farmer involvement. …”
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Development of calibration model to predict nitrogen content in single seeds of cowpea (Vigna unguiculata) using near infrared spectroscopy por Ishikawa, H., Boukar, O., Fatokun, C.A., Shono, M., Muranaka, S.

“…Improved varieties should contain reasonable amounts of protein in the grains, and to ensure this, timely and cost-effective analytical methods need to be developed. …”
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Registration of striga-resistant tropical extra- early maize population por Badu-Apraku, Baffour, Ewool, M., Yallou, C.G.

“…Results of trials at three locations in Nigeria and Benin Republic, 2006 and 2007, showed that under Striga-infested conditions, the cultivars 2004 TZEE-W Pop STR C4, derived from C4 of TZEE-W Pop STR, and TZEE-W Pop × LD (Set A2), were the most promising in terms of grain yield, low levels of Striga damage and Striga emergence. …”
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Acaulospora sieverdingii, an ecologically diverse new fungus in the Glomeromycota, described from lowland temperate Europe and tropical West Africa por Oehl, F., Sýkorová, Z., Błaszkowski, J., Sánchez Castro, I., Coyne, Danny L., Tchabi, A., Lawouin, L., Hountondji, F.C.C., Silva, G.A. da

“…Analyses of the ITS1, 5.8S subunit and ITS2 regions of the rDNA resolved each of the fi ve species in a monophyletic wellsupported clade and indicate that A. sieverdingii is phylogenetically closer to A. paulinae, A. cavernata and A. denticulata than to A. scrobiculata. …”
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Banana bunchy top virus in subSaharan Africa: investigations on virus distribution and diversity por Kumar, P. Lava, Hanna, R., Alabi, O.J., Soko, M.M., Oben, T.T., Vangu, G.H.P., Naidu, R.A.

“…Banana bunchy top virus (BBTV) was first reported from sub-Saharan Africa (SSA) from Democratic Republic of Congo (DRC) in the 1950s, has become invasive and spread into 11 countries in the region. …”
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An agro-economic survey of the weeds and weeding practices in cassava (Manihot esculenta Crantz) in Colombia por Doll, J., Pinstrup-Andersen, Per, Díaz, R.O.

“…The av no. of manual weedings was 3.3/crop, occupying 48 man-days/ha, which represents 50 percent of the total labor requirements for cassava production and more than 1/3 of the totalcosts. Reasons for not using herbicides were (1) relative costs of herbicides and labor, (2) lack of information, (3) lack of capital, (4) right herbicides were not available in small packages. …”
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Combining ability of maize inbred lines containing genes from Zea diploperennis for resistance to Striga hermonthica (Del.) Benth por Yallou, C.G., Menkir, A., Adetimirin, Victor O., Kling, J.G.

“…Forty-fivediallel crosses of 10 inbred lines were evaluated in an alpha-latticedesign with and without artificialStrigainfestation at two locationseach in the Republic of Benin and Nigeria for 3 years. Results ofanalyses showed that only general combining ability (GCA) meansquare was significant (P¼0.01) for number of emergedStrigaplants(NESPP), while both GCA and specific combining ability (SCA) meansquares were significant for host damage score (HDS) and grain yieldunderStrigainfestation. …”
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Registration of Strigaresistant and Droughttolerant tropical early maize populations TZEW Pop DT STR C4 and TZEY Pop DT STR C4 por Badu-Apraku, Baffour, Yallou, C.G.

“…In multilocation trials in Benin Republic and Nigeria, 2006 and 2007, TZE-W Pop STR C4 outyielded the Striga-susceptible check TZE Comp. 4 by 44% under Striga infestation and 12% when noninfested. …”
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Comparative demography of the spider mite Tetranychus ludeni on two host plants in West Africa por Adango, E., Onzo, A., Hanna, R., Atachi, P., James, B.

“…The comparison of intrinsic rates of natural increase (rm), the net reproductive rates (Ro) and the survival rates of adult stage of T. ludeni on the two vegetable crops suggests that T. ludeni performs better on S. macrocarpon than on A. cruentus. Reasons for the lower rate of population growth observed on amaranth should be studied in more details as this could be used in IPM strategies such as intercropping to reduce pest density and in developing biopesticides for use against T. ludeni in vegetable farms in Africa.…”
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Present status of maize diseases in the humid forest and western highlands of Cameroon por Ngoko, Z., Cardwell, K.F., Marasas, W.F.O., Tchamo, P, Tagne, A., Mwangi, M, Wingfield, M.J.

“…Maize disease surveys were conducted between 1995 and 2004 inthe Republic of Cameroon. A total of 260 farms in 36 villages, ranging from low altitudes with bimodal rainfall distribution to high altitudes with monomodal rainfall, were included in the surveys. ln the humidforest, Bipolaris maydis and Puccinio polysora were the prevalent fungi with a mean incidence of 70% in 1995 and 44% in 2004. …”
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Comparison of AFLP, ESTSSR, ISSR and SSR markers for polymorphism among recombinant inbred lines of tef (Eragrostis tef) por Chanyalew, S., Tefera, H., Harjit-Singh, Sorrells, M.E.

“…The majority (93%) of markers segregated as dominant markers.Even though AFLP markers are known in generating a large number of fragments per reaction, inthe present study, the number of resolvable fragments and polymorphic bands per gel with EST-SSR and ISSR markers were as high as AFLP. …”
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Contribution of soil quality to banana yield problems and its relation with other banana yield loss factors por Asten, Piet J.A. van, Gold, Cliford S., Wendt, J., Waele, D. de, Okech, S.H., Ssali, H., Tushemereirwe, Wilberforce K.

“…However, the functional relationships between pests, diseases and soil fertility problems are yet to be resolved. When developing improved crop management options, it is necessary to address pest, disease and soil problems in an integrated way.…”
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Contribution of soil quality to banana yield problems and its relation with other banana yield loss factors por Asten, Piet J.A. van, Gold, C., Wendt, J., Waele, D. de, Okech, S., Ssali, H., Tushemereirwe, Wilberforce K.

“…However, the functional relationships between pests, diseases and soil fertility problems are yet to be resolved. When developing improved crop management options, it is necessary to address pest, disease and soil problems in an integrated way.…”
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Banana Xanthomonas wilt: a review of the disease, management strategies and future research directions por Biruma, M., Pillay, M., Tripathi, L., Blomme, Guy, Abele, S., Mwangi, M., Bandyopadhyay, Ranajit, Muchunguzi, P., Kassim, S., Nyine, M., Turyagyenda, L.F., Eden-Green, S.

“…The disease has been identified in Uganda, Eastern Democratic Republic of Congo, Rwanda and Tanzania. Disease symptoms include wilting and yellowing of leaves, excretion of a yellowish bacterial ooze, premature ripening of the bunch, rotting of fruit and internal yellow discoloration of the vascular bundles. …”
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