Resultados de búsqueda - "being"

The global nitrogen cycle in the twenty-first century por Fowler, D., Coyle, M., Skiba, U., Sutton, M.A., Cape, J.N., Reis, S., Sheppard, L.J., Jenkins, A., Grizetti, B., Galloway, J.N., Vitousek, P., Leach, A., Bouwman, A.F., Butterbach-Bahl, Klaus, Dentener, F., Stevenson, D., Amann, Markus, Voss, M.l.

“…Some of the marine Nr is buried in sediments, the remainder being denitrified back to the atmosphere as N2 or N2O. …”
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Economic contribution and the potential use of wood charcoal for soil restoration: a case study of village-based charcoal production in Central Laos por Mekuria, Wolde, Sengtaheuanghoung, Oloth, Hoanh, Chu Thai, Noble, A.D.

“…Through a socio-economic survey, a cost-based method for economic valuation was undertaken on a range of charcoal production methods currently being used. Laboratory chemical analyses were performed on wood charcoal samples. …”
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Adding value to field-based agronomic research through climate risk assessment: a case study of maize production in Kitale, Kenya por Dixit PN, Cooper, Peter J.M., Dimes, John P., Rao, K.P.C.

“…Without knowledge of the full implications of weather variability on the performance of innovations being recommended, farmers cannot be properly advised about the possible weather-induced risks that they may face over time. …”
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Participatory learning for action research (PLAR) por Shaw, Alison, Kristjanson, Patricia M.

“…Farmers are taught to record what is being observed and then through monthly farmer meetings they come together to interpret this information in groups. …”
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Adapting to climate change: agricultural system and household impacts in East Africa por Thornton, Philip K., Jones, Peter G., Alagarswamy, G., Andresen, J., Herrero, Mario

“…Some within-country shifts in cropping away from the arid–semiarid systems to cooler, higher-elevation locations may be possible, but increased regional trade should be able to overcome the country-level production deficits in maize and beans caused by climate change to 2050, all other things being equal. For some places in the tropical highlands, maize and bean yield increases could have beneficial effects on household food security and income levels. …”
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Effect of supplementation of Sesbania sesban on post-weaning growth performance and sexual development of Menz sheep (Ethiopia) por Mekoya, A., Oosting, Simon J., Fernández Rivera, S., Tamminga, S., Tegegne, Azage, Zijpp, A.J. van der

“…Sixty weaned female and 60 male Ethiopian highland sheep in weight and age ranging between 7.2 and 11.8 kg and 4 and 5 months respectively were evaluated for a period of 9 months supplemented with three levels of S. sesban (0, 47.5 and 95% of supplementary protein provided by S. sesban and the rest being provided by a mix of concentrates). Between sex groups male sheep, and among treatments animals fed with 47.5 and 95% Sesbania in the supplement had significantly (P < 0.05) higher basal feed, supplement, and total feed intake than those supplemented with concentrate alone. …”
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Effect of supplementation of Sesbania sesban on reproductive performance of sheep por Mekoya, A., Oosting, Simon J., Fernández Rivera, S., Tamminga, S., Tegegne, Azage, Zijpp, A.J. van der

“…Forty ewes and 40 rams ranging in weight and age between 16–20 kg and 14–15 months respectively were fed a teff straw basal diet and supplemented with two levels of Sesbania (0, and 95% of supplementary protein provided by Sesbania and the rest being provided by concentrates) for 7 months. In experiment 1 (mating period), 4 paired female–male groups (diet of the male with or without Sesbania, and diet of the female with or without Sesbania) consisting of 20 animals each were formed and assigned for mating. …”
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Field and laboratory experiments to investigate infiltration processes and clogging effects from a ponding recharge system at Ban Nong Na, Bangrakum District, Phitsanulok Province,... por Nadee, S., Srisuk, K., Sarapirom, P., Pavelic, Paul, Uppasit, S.

“…Research is currently being conducted to investigate the feasibility of managed aquifer recharge by surface ponding methods in the Lower Yom River Basin. …”
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Water scarcity effects on equitable water distribution and land use in a major irrigation project: case study in India por Gaur, Anju, Biggs, Trent W., Gumma, Murali K., Gangadhara Rao, Parthasaradhi, Turral, Hugh

“…A 60% reduction in water availability during the drought resulted in 40% land being fallowed in the left-bank canal command area. …”
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Nutrient balances in African land use systems across different spatial scales: a review of approaches, challenges and progress por Cobo Borrero, Juan G., Dercon, G., Cadisch, Georg

“…The review showed nutrient balances being widely used across the continent. The collected dataset from 57 peer-reviewed studies indicated, however, that most of the balances were calculated at plot and farm scale, and generated in East Africa. …”
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Partial balance of nitrogen in a maize cropping systems in humic nitisol of Central Kenya por Kimetu, J.M., Mugendi, DN, Bationo, B. André, Palm, Cheryl A., Mutuo, PK, Kihara, Job Maguta, Nandwa, SM, Giller, Kenneth E.

“…This was also true for the residual mineral N in the soil at the end of the season which was about 7.8% of the applied N in the urea treatment and 5.2% in the tithonia treatment.From this study, it was therefore evident that although there is relatively lower N recovery by maize supplied with tithonia green biomass compared to maize supplied with urea, more nitrogen is being lost (through leaching) from the soil plant system in the urea applied plots than in tithonia applied plots. …”
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Tolerancia a suelos ácidos en poblaciones tropicales de maíz del CIMMYT por Ceballos, H., Pandey, S., Knapp, E.B., Duque, J.V.

“…Currently, five tropical maize populations from CIMMYT are being bred for tolerance to acid soils through a full-sib recurrent selection scheme. …”
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Preliminary evidence for genetic resistance to endoparasites in Menz and Horro lambs in the highlands of Ethiopia por Rege, J.E.O., Tembely, S., Mukasa, E., Sovani, S., Anindo, D.O., Lahlou-Kassi, A., Baker, R.L.

“…The Menz and Horro highland sheep breeds are being evaluated at the ILCA Debre Birhan research station in Ethiopia for between-and within-breed genetic variation for resistance to internal parasites. …”
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Economic analysis of cross-breeding programmes in sub-Saharan Africa: A conceptual framework and Kenyan case study por Karugia, Joseph T., Okeyo Mwai, Ally, Kaitho, R.J., Wollny, C.B.A., Drucker, Adam G., Rege, J.E.O.

“…It is argued that the weakened existing and the newly formed linkages ought to be taken into account when cross-breeding programmes are being evaluated. To accurately evaluate cross-breeding programmes it is, therefore, important to delineate all the outputs and inputs of such a system. …”
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Effect of hand-hoe based conservation agriculture on soil fertility and maize yield in selected smallholder areas in Zimbabwe por Nyamangara, Justice, Masvaya EN, Tirivavi R, Nyengerai K

“…Conservation agriculture (CA) based on hand-hoe prepared planting basins is being widely promoted in southern Africa, targeting resource-constrained farmers with limited access to draft power. …”
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Commercialization of Ethiopian agriculture: Extension service from input supplier to knowledge broker and facilitator por Gebremedhin, Berhanu, Hoekstra, Dirk, Tegegne, Azage

“…We find that the extension service is in the process of transition, with emphasis being shifted to the use of the newly established Farmers Training Centres (FTCs). …”
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A genetic map of cassava (Manihot esculenta Crantz) with integrated physical mapping of immunity-related genes por Soto, Johana Carolina, Ortíz, Juan Felipe, Perlaza-Jiménez, Laura, Vásquez, Andrea Ximena, Becerra López Lavelle, Luis Augusto, Mathew, Boby, Léon, Jens, Bernal, Adriana Jimena, Ballvora, Agim, López Carrascal, Camilo Ernesto

“…Cassava is threatened by several pathogens, but the mechanisms of defense are far from being understood. Besides, there has been a lack of information about the number of genes related to immunity as well as their distribution and genomic organization in the cassava genome. …”
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Greenhouse gas mitigation potential of the world’s grazing lands: Modeling soil carbon and nitrogen fluxes of mitigation practices por Henderson, Benjamin B., Gerber, Pierre J., Hilinski, T.E., Falcucci, A., Ojima, D.S., Salvatore, M., Conant, Richard T.

“…The soil C sequestration potential of 203 Tg CO2 yr−1 for legume sowing was higher than for improved grazing management, despite being applied over a much smaller total area. However, N2O emissions from legumes were estimated to offset 28% of its global C sequestration benefits, in CO2 equivalent terms. …”
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Enhancing resistance against African weevils through development of transgenic sweetpotato cultivars (Ipomoea batatas (L.) Lam.) expressing cry7Aa1, cry3Ca1 and ET33-34 genes. por Manrique Trujillo, S., Wamalwa, N.L., Díaz, D., Reano, R., Tovar, J.C., Prentice, K., Ormachea, M., Kreuze, Jan F., Machuka, J., Ghislain, M.

“…Transcriptional activity and Cry protein accumulation are being tested in leaves and storage roots by Real time PCR and DAS-ELISA respectively.…”
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Mobile applications for weather and climate information: their use and potential for smallholder farmers por Caine, A, Dorward, P., Clarkson, G., Evans, N, Canales, C., Stern, D., Stern, R.

“…Mobile phones are increasingly being used to provide smallholder farmers with agricultural and related information. …”
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