1,720,999 research outputs found
Verdeos de invierno. Resultados campaña 2023
No full textEn el siguiente informe se detallan los resultados obtenidos en ensayos comparativos de raigrás anual y avena realizados en la
EEA INTA Mercedes, durante la campaña 2023. También se describen las condiciones climáticas de la campaña, y mediciones de
raigrás anual en pastoreo realizadas en la estación experimental.EEA MercedesFil: Barbera, Pablo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Mercedes; Argentina.Fil: Benitez, Julio Cesar. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Mercedes; Argentina
Actualización de información ganadera
No full textAl año 2023 Argentina contó con un rodeo de 52.052.740 cabezas y la provincia de Corrientes participó con el 8% de los bovinos, ocupando el 5º lugar en el ranking de las provincias con mayor stock a nivel nacional (Tabla 1).EEA MercedesFil: Calvi, Mariana. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Mercedes; Argentina.Fil: Barbera, Pablo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Mercedes; Argentina.Fil: Aguilar, Domingo Emilio. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Mercedes; Argentin
Replication Data for: Tweeting from Left to Right: Is Online Political Communication More Than an Echo Chamber?
No full textWe estimated ideological preferences of 3.8 million Twitter users and, using a dataset of 150 million tweets concerning 12 political and non-political issues, explored whether online communication resembles an “echo chamber” due to selective exposure and ideological segregation or a “national conversation.” We observed that information was exchanged primarily among individuals with similar ideological preferences for political issues (e.g., presidential election, government shutdown) but not for many other current events (e.g., Boston marathon bombing, Super Bowl). Discussion of the Newtown shootings in 2012 reflected a dynamic process, beginning as a “national conversation” before being transformed into a polarized exchange. With respect to political and non-political issues, liberals were more likely than conservatives to engage in cross-ideological dissemination, highlighting an important asymmetry with respect to the structure of communication that is consistent with psychological theory and research. We conclude that previous work may have overestimated the degree of ideological segregation in social media usage
Replication Data for: Tweeting from Left to Right: Is Online Political Communication More Than an Echo Chamber?
No full textWe estimated ideological preferences of 3.8 million Twitter users and, using a dataset of 150 million tweets concerning 12 political and non-political issues, explored whether online communication resembles an “echo chamber” due to selective exposure and ideological segregation or a “national conversation.” We observed that information was exchanged primarily among individuals with similar ideological preferences for political issues (e.g., presidential election, government shutdown) but not for many other current events (e.g., Boston marathon bombing, Super Bowl). Discussion of the Newtown shootings in 2012 reflected a dynamic process, beginning as a “national conversation” before being transformed into a polarized exchange. With respect to political and non-political issues, liberals were more likely than conservatives to engage in cross-ideological dissemination, highlighting an important asymmetry with respect to the structure of communication that is consistent with psychological theory and research. We conclude that previous work may have overestimated the degree of ideological segregation in social media usage
Fertilización con K, S y Zn aumenta la producción de lotus pero no de trébol blanco en mezcla con raigrás en Corrientes = Fertilization with K, S and Zn increases yield of lotus but not of white clover in central Corrientes
No full textLa fertilización con K, S y Zn puede aumentar la producción de leguminosas en pasturas (Collins et al. 1986; Grewal et al. 2000). Corrientes presenta suelos pobres en estos nutrientes y esta técnica podría favorecer la participación de las leguminosas en verdeos y pasturas mixtas. Los objetivos del trabajo fueron: 1) determinar el efecto de la fertilización completa (P, K, S y Zn) vs fertilización fosforada en la producción de Lotus corniculatus (Lotus) y de Trifolium repens (TB) sembrados con raigrás anual (Rg), y 2) Comparar la producción de Lotus, TB y Medicago sativa (Alfalfa) sembrados con Rg y con fertilización completa.EEA MercedesFil: Barbera, Pablo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Mercedes; ArgentinaFil: Benitez, Julio Cesar. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Mercedes; Argentin
Replication Data for: The Critical Periphery in the Growth of Social Protests
No full textSocial media have provided instrumental means of communication in many recent political protests. The efficiency of online networks in disseminating timely information has been praised by many commentators; at the same time, users are often derided as “slacktivists” because of the shallow commitment involved in clicking a forwarding button. Here we consider the role of these peripheral online participants, the immense majority of users who surround the small epicenter of protests, representing layers of diminishing online activity around the committed minority. We analyze three datasets tracking protest communication in different languages and political contexts through the social media platform Twitter and employ a network decomposition technique to examine their hierarchical structure. We provide consistent evidence that peripheral participants are critical in increasing the reach of protest messages and generating online content at levels that are comparable to core participants. Although committed minorities may constitute the heart of protest movements, our results suggest that their success in maximizing the number of online citizens exposed to protest messages depends, at least in part, on activating the critical periphery. Peripheral users are less active on a per capita basis, but their power lies in their numbers: their aggregate contribution to the spread of protest messages is comparable in magnitude to that of core participants. An analysis of two other datasets unrelated to mass protests strengthens our interpretation that core-periphery dynamics are characteristically important in the context of collective action events. Theoretical models of diffusion in social networks would benefit from increased attention to the role of peripheral nodes in the propagation of information and behavior
Replication Data for: The Critical Periphery in the Growth of Social Protests
No full textSocial media have provided instrumental means of communication in many recent political protests. The efficiency of online networks in disseminating timely information has been praised by many commentators; at the same time, users are often derided as “slacktivists” because of the shallow commitment involved in clicking a forwarding button. Here we consider the role of these peripheral online participants, the immense majority of users who surround the small epicenter of protests, representing layers of diminishing online activity around the committed minority. We analyze three datasets tracking protest communication in different languages and political contexts through the social media platform Twitter and employ a network decomposition technique to examine their hierarchical structure. We provide consistent evidence that peripheral participants are critical in increasing the reach of protest messages and generating online content at levels that are comparable to core participants. Although committed minorities may constitute the heart of protest movements, our results suggest that their success in maximizing the number of online citizens exposed to protest messages depends, at least in part, on activating the critical periphery. Peripheral users are less active on a per capita basis, but their power lies in their numbers: their aggregate contribution to the spread of protest messages is comparable in magnitude to that of core participants. An analysis of two other datasets unrelated to mass protests strengthens our interpretation that core-periphery dynamics are characteristically important in the context of collective action events. Theoretical models of diffusion in social networks would benefit from increased attention to the role of peripheral nodes in the propagation of information and behavior
Estimación de biomasa aérea en verdeos de raigrás anual con métodos manuales y sensores remotos montados sobre drone
No full textConocer la biomasa aérea de los recursos forrajeros es importante para el manejo del pastoreo, la evaluación de prácticas
agronómicas y la identificación de ambientes. Los métodos directos de estimación de la biomasa implican realizar cortes
representativos de toda el área de pastoreo. Por ello son costosos en tiempo y mano de obra, y son difíciles de implementar en
superficies grandes. Existen otros métodos manuales indirectos, como las mediciones de altura con regla o con platos
(pasturómetro) que son más prácticos que la medición por corte, pero que igualmente requieren recorrer el área
completamente. Los sensores remotos, a través de la generación de índices de vegetación, pueden representar una alternativa
de estimación de la biomasa que supera estas limitantes operativas en muchas situaciones productivas. Si bien la utilización de
sensores remotos para cuestiones agronómicas ha comenzado hace más de 50 años, su disponibilidad y aplicación directa en
sistemas de producción ganaderos es incipiente en el centro sur de Corrientes.
Los principales recursos forrajeros implantados en la región centro sur de Corrientes son las pasturas estivales y los verdeos de
invierno. En el presente trabajo se hará énfasis sobre el uso de sensores remotos montados sobre drone o en dispositivo manual
para estimar biomasa aérea en verdeos de raigrás anual.EEA MercedesFil: García, Alberto. Actividad privada; ArgentinaFil: Barbera, Pablo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Mercedes; Argentina
Control de renovales de Acacia caven (ex Vachellia caven)
No full textLa creciente lignificación de los predios de la región, se ha convertido en un problema para el desarrollo de la actividad ganadera ya que disminuye la receptividad de los campos (Macias, 2011). Particularmente en la región centro sur de Corrientes el avance de la especie Acacia caven (aromito) es un problema cada vez más manifiesto, reduciendo la capacidad de carga de los potreros y dificultando el desplazamiento dentro de los mismos debido a la formación de sectores cerrados tanto para la hacienda como para los “recorredores”. Con respecto a las causas del incremento en la cantidad de renoval, la agricultura y el sobre pastoreo en combinación con excesos y déficit hídricos, aparecen como los principales motivos. También se cree que el retroceso en la población de ovinos, puede haber favorecido el incremento de la especie.Estación Experimental Agropecuaria MercedesFil: Barbera, Pablo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Mercedes; Argentina.Fil: Pizzio, Rafael Mario. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Mercedes; Argentina
Replication Data for: Who Leads? Who Follows? Measuring Issue Attention and Agenda Setting by Legislators and the Mass Public Using Social Media Data
No full textThis archive contains the data and code required to replicate Barberá et al, "Who Leads? Who Follows? Measuring Issue Attention and Agenda Setting by Legislators and the Mass Public Using Social Media Data" (APSR).
See README.pdf for additional information. A copy of the code is also available at: https://github.com/SMAPPNYU/lead_follow_aps
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