1,721,225 research outputs found
Producción orgánica de tomate bajo condiciones de invernadero
No full text"La producción de tomate en invernadero con riego por goteo y sustrato de arena con composta permite que las plantas se desarrollen incrementando su rendimiento y calidad sin la aplicación de fertilizantes
químicos. Así pues, es necesario encontrar fuentes de elementos nutritivos,
apegados a las normas de producción orgánica, que satisfagan los requerimientos de los cultivos.
El estudio fue realizado en la UAAAN Unidad Laguna, Torreón, Coahuila, durante el ciclo 2005-2006, Los tratamientos fueron distribuidos con
un diseño completamente al azar, con arreglo factorial 5 x 2, identificando los tratamientos como factor A y genotipos como factor B : b).-Boski e lvonne, Y a).- tratamientos, T1:Arena lavada de río + Solución nutritiva (inorgánico) + 2 L de agua / día, T2 : Arena lavada de río + el te de composta + 2 L de agua / día, T3: Arena-composta al 50 % , la maceta se llenara al 100% de su capacidad + fertilizante orgánico + 2 L de agua /día esto seria para la mitad del surco y la otra mitad se aplicara te de composta + 2 L de agua/ día y el T4: Arena-composta al 50 %+ te de composta + 2 L de agua /día, al inicio la maceta se llenara al 50% de su capacidad y posteriormente se llenara al 100% T5
Arena-composta fraccionado al 25 %+ 1 L de agua c/3 día para reducir los posibles efecto de deficiencia de algunos elementos nutritivos.
La siembra se realizo el 28 de julio, en charolas germinadoras de 200 celdillas, el sustrato para germinación se utilizó peat Most, el trasplante se
realizo el 3 de septiembre del 2005 en macetas de 18 I, la arena fuepreviamente desinfectada con agua y cloro al 5 %. Las variables evaluadas fueron: precocidad días a cosecha, altura de planta, rendimiento y calidad.
No se presento diferencia significativa en genotipos evaluados, solo
presento diferencias estadísticas altamente al (p50.01), se obtuvieron
rendimientos medios de 208.8 t ha-1 y 215.5 t ha-1 con los genotipos Romina y
lvonne. Respectivamente con el genotipo Ivonne con un promedio de peso
de fruto de 218.8 gr y 4.3 ° Brix. Para la variable de calidad si presenta diferencia altamente significativas en: diámetro polar, diámetro ecuatorial, o Brix, Espesor de pulpa, y en numero de lóculos entre tratamiento y genotipo y no significativos en peso del fruto, destacando el genotipo Bosky en los cinco
tratamientos.
En cuanto a altura no hubo diferencias altamente significativas en tratamiento. Destacando el genotipo Ivonne, en cuanto a clorofila no se significativas entre tratamientos sobresaliendo el Genotipo lvonne. En cuanto a biomasa no hubo efecto entre tratamientos y genotipo todos fueron
estadísticamente iguales
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
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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Evaluación de tomate co-inoculado con Azospirillum spp y micorrizas spp en compost + perlita + arena bajo invernadero
No full textPara la agricultura actual reviste gran importancia la preparación de biopreparados conjuntos, de hongos-rizobacterias, que tengan una acción eficaz sobre las plantas y el agroecosistema, siendo además un mecanismo más viable desde el punto de vista económico (Terry y Leyva, 2006). El uso de micorrizas en la agricultura implica notables efectos beneficiosos tanto en la productividad como en la calidad de los vegetales, a las asociaciones de microrrizas se le han atribuido múltiples funciones entre las que destacan el mejoramiento de la superficie absorbente del sistema radicular a través de un aumento significativo de ella, aumento a la tolerancia de las toxinas, resistencia a condiciones adversas (sequía, salinidad entre otras)
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