1,720,982 research outputs found
Microbial dynamics and fertility characteristics in compost from different waste and maturation processes
Get PDFWe evaluated the abundance of microbial functional groups involved in compost fertility, and the chemical parameters of maturity and quality most commonly analyzed in compost products. We employed compost produced using the same hydrolytic stage and two maturation processes (with and without earthworms) and with different organic wastes. Our aim was to propose a valid tool for measuring the quality standards of compost fertility from a microbial perspective. The products obtained from both maturation processes were highly variable in their chemical and biological composition (without following a general pattern). Because the results are so heterogeneous, proposing a microbial population as universal indicator of the degree of compost fertility is very difficult. However, the microbial community structure might be used as a maturity index, because the products that best fulfilled the chemical stability parameters were those with lowest number of populations in its community.Fil: Abril, Adriana. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias; ArgentinaFil: Noe, L.. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias; ArgentinaFil: Filippini, Maria Flavia Ramona. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias; ArgentinaFil: Cony, Mariano Anibal. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Investigaciones de las Zonas Áridas. Provincia de Mendoza. Instituto Argentino de Investigaciones de las Zonas Áridas. Universidad Nacional de Cuyo. Instituto Argentino de Investigaciones de las Zonas Áridas; ArgentinaFil: Martinez, L.. Instituto Nacional de Tecnologia Agropecuaria. Centro Regional Mendoza-san Juan. Estacion Experimental Agropecuaria Mendoza. Agencia de Extension Rural Lujan de Cuyo.; Argentin
Effects of organic amendment application on soil quality and garlic yield in central-western Argentina
Get PDFWe analyzed during two garlic crop cycles, the effects of chicken manure and vermicompost on soil chemical and biological properties in an agricultural farm irrigated with municipal wastewater of central-western Argentina. Also we evaluate garlic yield and possible health risks as resulting from the organic amendments and the wastewater use. We found that: a) different doses and types of amendments did not have any significant effects on soil fertility; b) chicken manure and soil before planting, had E. coli and Salmonella spp.; and c) crop yields were quite similar in all treatments, only treatments with 8 Mg ha-1 of both amendments (chicken manure and vermicompost) without N fertilized, were significantly higher than control in both garlic assays. These results are probably the consequence of heavily tilled soils and poor quality of irrigation water with high abundance of enteric bacteria and labile organic matter content. We conclude that to obtain beneficial effects on soil fertility from organic amendment application, wastewater treatment systems must be improved and tillage practices must be reduced.EEA MendozaFil: Filippini, Maria Flavia. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias; ArgentinaFil: Abril, Adriana. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias. Microbiología Agrícola; ArgentinaFil: Cony, Mariano Anibal. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Investigaciones de Las Zonas Aridas. Provincia de Mendoza. Instituto Argentino de Investigaciones de Las Zonas Aridas. Universidad Nacional de Cuyo. Instituto Argentino de Investigaciones de Las Zonas Aridas; ArgentinaFil: Noe, Laura. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias. Microbiología Agrícola; ArgentinaFil: Venier, Matias. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias; ArgentinaFil: Cónsoli, Daniela. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias; ArgentinaFil: Vallone, Rosana Celia. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Mendoza; Argentin
Effects of organic amendment application on soil quality and garlic yield in Central-Western Argentina
Get PDFWe analyzed during two garlic crop cycles, the effects of chicken manure and vermicompost on soil chemical and biological properties in an agricultural farm irrigated with municipal wastewater of central-western Argentina. Also we evaluate garlic yield and possible health risks as resulting from the organic amendments and the wastewater use. We found that: a) different doses and types of amendments did not have any significant effects on soil fertility; b) chicken manure and soil before planting, had E. coli and Salmonella spp.; and c) crop yields were quite similar in all treatments, only treatments with 8 Mg ha -1 of both amendments (chicken manure and vermicompost) without N fertilized, were significantly higher than control in both garlic assays. These results are probably the consequence of heavily tilled soils and poor quality of irrigation water with high abundance of enteric bacteria and labile organic matter content. We conclude that to obtain beneficial effects on soil fertility from organic amendment application, wastewater treatment systems must be improved and tillage practices must be reduced. © Filippini et al.Fil: Filippini, Maria Flavia Ramona. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias; ArgentinaFil: Abril, Adriana. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias; ArgentinaFil: Cony, Mariano Anibal. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Investigaciones de las Zonas Áridas. Provincia de Mendoza. Instituto Argentino de Investigaciones de las Zonas Áridas. Universidad Nacional de Cuyo. Instituto Argentino de Investigaciones de las Zonas Áridas; ArgentinaFil: Noé, L.. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias; ArgentinaFil: Venier, M.. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias; ArgentinaFil: Cónsoli, Daniela Virginia. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias; ArgentinaFil: Vallone, R.. INTA EEA Mendoza; Argentin
How rootstocks influence salt tolerance in grapevine?. The role of conferred vigor and ionic exclusion
No full textThe aim of this work was to evaluate whether selected grapevine rootstocks can confer greater salt tolerance than own-rooted Vitis vinifera L. A trial was carried out with potted own-rooted 'Malbec' vines and also grafted onto three rootstocks (101-14 Mgt, 1103P and Cereza). Aditionally, the vines were irrigated with a solution containing 0, 50 and 100 mM NaCl. Vegetative growth was the most sensitive variable to salinity and was affected even at 50 mM. Above 0.1% dw Na+ and 0.6% dw Cl-, the leaf area was negatively correlated with Na+ and Cl- in leaf blades. Membrane integrity and chlorophyll content in leaves were affected only at 100 mM. At 50 mM, 1103P showed a decrease in leaf area but this parameter was not further affected at 100 mM. Own-rooted and 1103P vines showed fewer visual symptoms of toxicity and maintained higher leaf area (+450% higher relative to 101-14 Mgt) and higher membrane integrity (+81% higher relative to Cereza) at high salinity. Own-rooted and 1103P vines grown in 0 mM NaCl also showed higher leaf area and biomass production (i.e., vigor), suggesting that salt tolerance is linked to innate vigor. Regardless of the NaCl content, 101-14Mgt showed higher Na+ concentration in leaf blades than own-rooted and 1103P vines (+266%). At 50 mM, Cereza concentrated more Cl- than the others (+114%). At 100 mM, Cereza and 101-14 Mgt concentrated more Cl- than both 1103P and own-rooted vines (+133%). The 1103P limited the entry of Na+ and Cl- to the vines more than the others (-58 and -62% respectively), suggesting a higher exclusion capacity. The results suggest that the use of own-rooted 'Malbec' remains as a viable alternative under high soil salinity conditions. The use of the 1103P rootstock also appears as an alternative due to its excluding behavior.EEA MendozaFil: Vila, Hernan Felix. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Mendoza. Laboratorio de Viticultura; ArgentinaFil: Di Filippo, Marina Laura. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Mendoza. Laboratorio de Viticultura; ArgentinaFil: Venier, Matias. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Cátedra de Quı́mica Agrı́cola; ArgentinaFil: Filippini, Maria Flavia. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Cátedra de Quı́mica Agrı́cola; Argentin
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Huerta Ecológica Santa Elena: Una experiencia de Agricultura Sostenida por la Comunidad
No full textHuerta Ecológica Santa Elena:Una experiencia de Agricultura Sostenida por la ComunidadEl presente trabajo describe una experiencia de Agricultura Sostenida por la Comunidad (ASC), desarrollada en la Huerta Ecológica Santa Elena - Centro Comunitario de Extensión N° 10 de la Universidad Nacional de La Plata.La Huerta está conformada como organización comunitaria que desarrolla su actividad en el Parque Pereyra Iraola, provincia de Buenos Aires, Argentina. Su producción está basada en el cultivo de hortalizas de manera agroecológica para mercados de proximidad: venta directa del productor al consumidor y distribución a domicilio.Nacida como finca productiva familiar en 1949 y pionera en ?agricultura sin agrotóxicos? en la región desde fines de la década de 1990, en 2017 entra en crisis debido a dificultades de continuidad generacional en el trabajo hortícola, un proceso de descapitalización producto de inclemencias climáticas que afectaron su infraestructura y la ausencia de apoyo estatal significativo. Como respuesta a esta situación, en 2018 se pone en marcha un proyecto de ASC.Fil: Glenza, Fernando. Universidad Nacional de La Plata. Facultad de Periodismo y Comunicación Social; ArgentinaFil: Giannuzzi, Leda. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigación y Desarrollo en Criotecnología de Alimentos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Criotecnología de Alimentos. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Criotecnología de Alimentos; ArgentinaFil: Senattori, Elena. Universidad Nacional de La Plata; Argentina1er. Congreso Argentino de AgroecologiaMendozaArgentinaUniversidad Nacional de Cuyo. Facultad de Ciencias AgrariasSociedad Argentina de Agroecologí
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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