Resultados de búsqueda - EHESS~

Wetlands and agriculture: a case for integrated water resource management in Sri Lanka por Atapattu, Sithara S., de Silva, Sanjiv, Senaratna Sellamuttu, Sonali

“…Two major problems, which concern downstream fisheries and livelihoods, are high levels of agricultural pollution, especially through the excessive use of fertilizers, and modifications to the hydrology. …”
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Observed and projected climatic changes, their impacts and adaptation options for Sri Lanka: a review por Eriyagama, Nishadi, Smakhtin, Vladimir U.

“…s agriculture and economy For example, an increase of 0.5 0C in temperature can reduce rice yield by approximately 6%; extended dry spells and excessive cloudiness during the wet season can reduce coconut yield resulting in annual losses between $32 and $73 million to the economy. …”
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Hydrological water availability, trends and allocation in the Blue Nile Basin por Awulachew, Seleshi Bekele, McCartney, Matthew P., Shiferaw, Y. S., Mohamed, Yasir Abbas

“…In contrast, Sudan uses significant volumes both for irrigation (currently in excess of 1,1 million ha) and for hydropower production. …”
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Shallow wells, the untapped resource with a potential to improve agriculture and food security in southern Mali por Zemadim, Birhanu, Tabo, Ramadjita

“…Background Excessive rainwater during the rainy season and lack of water in the dry season have been challenging the agricultural productivity and food security for rural communities in southern Mali. …”
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Natural resource integrity: A resilient community on the degraded slopes of Mount Elgon takes on mending its broken landscape por Otiende, V.A., Bourne, M., Tanui, J., Mowo, J.

“…The once beautiful foothills of Mount Elgon, in eastern Uganda are today seriously degraded, with excessive water run-offs and landslides becoming regular occurrences. …”
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First report of Phakopsora pachyrhizi causing rust on soybean in Malawi por Murithi, H., Beed, Fenton D., Soko, M., Haudenshield, J.S., Hartman, G.L.

“…P. pachyrhizi DNA was detected in excess of 180,000 genome equivalents/cm2 in all samples, indicating a substantial infection. …”
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Addressing post-harvest losses during traditional banana fermentation for increased food security in Southwest Uganda por Whitney, Cory W., Mukiibi, E., Nakaketo, C., Gebauer, J., Rietveld, Anne M., Kehlenbeck, K.

“…Other causes of PHL during processing are excessive peeling for tonto processing (loss of banana flesh=18.6%±5.8%) and losses of intermediate products during distillation of amarwa (loss=75.9%±1.3%). …”
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Approaches to diagnosis and detection of cassava brown streak virus (Potiviridae: Ipomovirus) in fieldgrown cassava crop por Rwegasira, G.M., Rey, M.E.C., Nawabu, H.

“…A choice of the suitable sample is of absolute necessity, and bulking of many samples for collective CBSV detection over a large crop stand is effective.…”
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Evaluation and delivery of disease resistant cassava varieties with comparable micronutrient density to farmers in Cameroon por Njukwe, E., Amah, D., Ndango, R., Tindo, M., Dixon, A., Tenkouano, A.

“…However, traditional varieties have become relative unproductive, due to a combination of biotic and abiotic constraints, thus justifying the necessity to cultivate improved varieties. In recent years, the International Institute of Tropical Agriculture (IITA) has used conventional breeding methods to achieve important breakthrough in developing pest and disease resistant varieties with low cyanide content, short crop cycle, high-yield and micronutrient content. …”
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Trade-offs related to agricultural use of antimicrobials and synergies emanating from efforts to mitigate antimicrobial resistance por Wieland, Barbara, Grace, Delia, McDermott, John J., Magnusson, Ulf, Waage, Jeff, Fèvre, Eric M., Chadag, Vishnumurthy Mohan, Schillinger, Dieter

“…The situation is particularly complex in low- and middle-income countries (LMIC), where excessive use in intensifying systems and limited access to drugs in some areas are a problem. …”
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Diversity of Meloidogyne spp. from peri-urban areas of sub-Saharan Africa and their genetic similarity with populations from the Latin America por Santos, M.F. dos, Silva Mattos, V. da, Monteiro, J.M., Almeida, M.R., Jorge, A.S., Cares, J.E., Castagnone-Sereno, P., Coyne, D., Carneiro, R.M.

“…These highly intensive systems are characterized by high levels of pests and diseases and an excessive use of synthetic pesticides to reduce their population densities. …”
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Cropland Net Ecosystem Exchange Estimation for the Inland Pampas (Argentina) Using EVI, Land Cover Maps, and Eddy Covariance Fluxes por Marconato, Ulises Mariano, Fernández, Roberto J., Posse Beaulieu, Gabriela

“…Between 60% and 80% of the carbon sequestered was exported during harvest, a large decrease from the carbon sequestration capacity estimated using just NEE, which further decreased if fossil carbon emissions from agricultural supplies are taken into account. …”
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Diversified crop sequences to reduce soil nitrogen mining in agroecosystems por Novelli, Leonardo Esteban, Caviglia, Octavio, Jobbagy Gampel, Esteban Gabriel, Sadras, Victor Oscar

“…Crop sequence returned a 2.2–3.1-fold variation in productivity (from 4.7 to 10.9 Mg ha-1 in the Mollisol and from 3.4 to 9.9 Mg ha-1 in the Vertisol), 1.5-fold variation in profitability (from 0.92 to 2.14), variation in nitrogen balance from soil mining at − 35 kg N ha-1 year-1 to excess at 17 kg N ha-1 year-1, and a variation in nitrogen use efficiency at crop sequence level (NUEs) from 0.7 to 1.2 in both soil types. …”
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First-year cover crop effects on the physical and hydraulic properties of the surface layer in a loamy soil por Villarreal, Rafael, Lozano, Luis Alberto, Melani, Esteban, Polich, Nicolás Guillermo, Salazar, María Paz, Bellora, Guido Lautaro, Soracco, Carlos Germán

“…As well, the results show the necessity of including the short-term changes in the study of soil hydraulics properties.…”
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An evaluation of soil carbon models and their role on finding ways to net-zero carbon in agricultural systems por Vazquez Amabile, Gabriel, Studdert, Guillermo, Ogle, Stephen M., Beltran, Marcelo Javier, Said, Andrés Demián, Galbusera, Sebastián, Montiel, Fátima Soledad, Moreno, Rocio, Ricard, María Florencia

“…In this way, SOC models help decision makers involved in agriculture to understand the dynamics of the SOC and the interaction between all variables related to soil, climate, land use, and management, to design the best solution to reduce emissions or enable carbon sequestration. Likewise, it is important to identify suitable models for the region. …”
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Analyzing diversification possibilities on specialized tobacco farms in Argentina using a bio-economic farm model por Chavez Clemente, Maria Daniela, Berentsen, Paul, Oude Lansink, Alfons

“…In the specific case of Valle de Lerma, many years of continuous tobacco mono-cropping, excessive ploughing and poor irrigation control have caused soil degradation of the land used for tobacco. …”
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To chop or not to chop? Tackling shrub encroachment by roller-chopping preserves woody plant diversity and composition in a dry subtropical forest por Rejžek, Martin, Coria, Rubén Darío, Kunst, Carlos Roberto, Svátek, Martin, Kvasnica, Jakub, Navall, Jorge Marcelo, Ledesma, Roxana Ramona, Gomez, Adriana Teresita, Matula, Radim

“…Under the Chaco silvopastoral system, a commonly used treatment to disrupt the excessive shrub layer and promote the growth of grasses is roller-chopping by a tractor-pulled iron drum. …”
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Remotely‐sensed primary productivity shows that domestic and native herbivores combined are overgrazing Patagonia por Oliva, Gabriel Esteban, Paredes, Paula Natalia, Ferrante, Daniela, Cepeda, Carla Tamara, Rabinovich, Jorge Eduardo

“…Participation of guanacos as a critical excess in total grazing pressure is debatable, but management of these populations is necessary and may be increasingly attractive if combined production systems are developed to incorporate wild meat and fibre. …”
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Ecuaciones alométricas de biomasa aérea para Prosopis nigra (Griseb.) Hieron. en bosques de Entre Ríos (Argentina) por Sione, Silvana María José, Ledesma, Silvia Gabriela, Rosenberger, Leandro Javier, Oszust, José Daniel, Andrade-Castañeda, Hernán J., Maciel, Gabriel Omar, Wilson, Marcelo German, Sasal, Maria Carolina

“…La bondad de ajuste de los modelos se evaluó mediante el coeficiente de determinación ajustado, error cuadrático medio de predicción, estadígrafo PRESS, Criterios de Información de Akaike y Bayesiano e Índice Furnival. …”
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Critical nitrogen dilution curve and dry matter production parameters for several Mediterranean vegetables por De-Paz, José M., Ramos, Carlos, Visconti, Fernando

“…Inadequate nitrogen fertilizing practices lead to low nitrogen uptake efficiency (NUE), which increases water NO3− pollution, as well as N2O emissions to the atmosphere. In order to increase the NUE and decrease the N losses as NO3− and N2O from the soil-plant system, accurate data about optimum crop N concentrations and dry matter production throughout the growing season are still needed for many vegetables typically grown under Mediterranean climate. …”
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