Farmers' Perceptions about Spatial Yield Variability and Precision Farming Technology Adoption: An Empirical Study of Cotton Production in 12 Southeastern States

This paper examines how cotton farmers' perceptions about their spatial yield variability influence their decision to adopt precision farming technologies. Utilizing cross-section survey data from 12 Southeastern states and a two-step econometric modeling approach, we find that farmers who perceive their yields as more spatially heterogeneous will more likely use site specific information gathering technologies and apply their inputs at a variable rate. In addition, our empirical analysis shows that perceptions about future profitability and importance of precision farming, along with socio-economic factors, also drive the technology adoption decision. These results have implications for producers contemplating the variable rate management decisions, as well as dealers selling these precision farming technologies.Multinomial logit, endogeneity, variable rate input applications, site specific information gathering technology, yield perceptions, Agribusiness, Farm Management, Production Economics, Productivity Analysis, Q12, Q16,

TEORÍA DE LA MENTE EN TAREAS DE FALSA CREENCIA Y PRODUCCIÓN NARRATIVA EN PREESCOLARES: INVESTIGACIONES CONTEMPORÁNEAS/ THEORY OF MIND IN FALSE BELIEF TASKS AND NARRATIVE PRODUCTION IN PRESCHOOLERS: CONTEMPORARY RESEARCH/ TEORIA DA MENTE EM TAREFAS DE FALSA CRENÇA E PRODUÇÃO NARRATIVA EM PRÉ-ESCOLARES: INVESTIGAÇÕES CONTEMPORÂNEAS

Este artículo presenta una reflexión sobre el desarrollo de la producción narrativa y el de la teoría de la mente en la etapa preescolar. En cada campo se plantean sus bases conceptuales, reportes y evidencias investigativas. Se muestra que en la producción narrativa los niños adquieren de manera relativamente tardía en su primera infancia las primeras habilidades que les permiten organizar una narración para contarla a otros. Se señala, además, que el desarrollo de la teoría de la mente está relacionado con el del lenguaje, aunque se cuenta con menos estudios sobre su relación con la producción narrativa. Se identifica la necesidad de un marco integrador de las explicaciones de las variantes conceptuales y metodológicas planteadas en esta reflexión

Factors Influencing Selection of Information Sources by Cotton Producers Considering Adoption of Precision Agriculture Technologies

Acknowledgements: The authors thank Cotton Incorporated and the Tennessee Agricultural Experiment Station for financial supportInformation source use decisions, Precision Agriculture Technologies, Extension, Media, Private sources, Multivariate Probit, Teaching/Communication/Extension/Profession, Q12, Q16,

Factors Influencing the Selection of Precision Farming Information Sources by Cotton Producers

Precision farming information demanded by cotton producers is provided by various suppliers, including consultants, farm input dealerships, University Extension systems, and media sources. Factors associated with the decisions to select among information sources to search for precision farming information are analyzed using a multivariate probit regression accounting for correlation among the different selection decisions. Factors influencing these decisions are age, education, and income. These findings should be valuable to precision farming information providers who may be able to better meet their target clientele needs.Extension, information-source-use decisions, media, multivariate probit, precision agriculture technologies, private sources, Farm Management, Teaching/Communication/Extension/Profession,

Factors Influencing Cotton Farmers’ Perceptions about the Importance of Information Sources in Precision Farming Decisions

Information generated by precision farming technologies is of particular importance to producers. Precision farming technologies implies the ability to improve the management of production factors using site-specific information. This study examines factors influencing cotton farmers’ perceptions about the importance of crop consultants, farm input dealerships, Extension, other farmers, trade shows, the Internet and printed news/media for making precision farming decisions using a rank ordered logit model (ROLM). Results suggest that age, land tenure, income, percentage of income from farming, and location may affect farmers’ perceptions about the importance of different information sources when making decisions about precision farming technologies. Results suggest that regardless of farmer/farm business characteristics other farmers (OF) is one of the most important information sources when making precision farming decisions. Findings suggest that high income producers are more likely to prefer crop consultants, University/Extension, trade shows, and the Internet over OF as a source of information when making decisions about precision farming technologies. Findings also suggest that researchers need to be very careful when designing questions that ask respondents to rank alternatives so that they guarantee that individuals with different skills are able to precisely understand what is being asked. Decreasing the number of alternatives respondents must consider may be one strategy to reduce the complexity of ranking questions to minimize the probability of the respondents leaving alternatives unranked or ranking them randomly.Information-source preferences, Rank Ordered Logit Model, Precision Farming, Production Economics, Research Methods/ Statistical Methods, Q16, C25,

Reasons for Adopting Precision Farming: A Case Study of U.S. Cotton Farmers

We used survey data collected from cotton farmers in 12 southern U.S. states to identify factors influencing cotton farmers’ decisions to adopt precision farming. Using a seemingly unrelated ordered probit model, we found that younger, educated and computer literate farmers chose precision farming for profit reason. Farmers who perceived precision farming to be profitable adopt it to be at the forefront of agricultural technology. We also found that farmers who were concerned with environment emphasize precision farming adoption as a reason to improve environmental quality. Our results also indicate that farmers in coastal states such as Alabama, Mississippi, and North Carolina chose environmental benefits as a reason for precision farming technology adoption.precision technologies, seemingly unrelated ordered probit, cotton, Agricultural Finance, Farm Management, Q16, C35,

ELECTROPHORETIC REGISTERS: CORRECCIÓN DE LÍNEA BASE, ALINEAMIENTO, ELIMINACIÓN DE RUIDO Y CONCENTRACION DE ENERGÍA

Este artículo presenta una nueva metodología para lacorrección de línea base, el alineamiento de picos, la eliminación de ruido y la clasificación de datos electroforéticos (DER). Las técnicas matemáticas usadas fueron: corrección linea base L2, análisis wavelet,alineamiento Nedleman and Wusch y análisis multi energía que fue utilizada con el propósito de ubicar información importante en los aminoácidos presentes en los datos electroforéticos. Adicionalmente,este artículo evidencia que es posible corregir la línea base, eliminar ruido y alinear datos electroforéticos sin cambiar sus características originales de energía y formas de onda. Se utilizaron 35 señales, en las cuales el porcentaje de error en cuanto a corrección de línea base fue de 0%, en alineamiento fue de 1.23%, y de clasificación fue de 3.5±1.2.Finalmente, se muestra que es posible utilizar esta metodología sin importar las características de las señales originales, lo que permite que sea un sistema de múltiples soluciones en los datos electroforéticos,cromatográficos y otros

The P4G-Getting to Zero Coalition Partnership: Finding and supporting opportunities to decarbonise shipping in Indonesia, Mexico and South Africa

The International Maritime Organization has committed to reducing greenhouse gases emissions from international shipping by at least 50% by 2050 compared to 2008 levels. To reach that goal, a shift towards new low- and zero-carbon fuels -such as hydrogen and ammonia- is urgently needed, along with the deployment of safe and reliable zero-emission vessels, technologies and infrastructure. With shipping being a potential significant demand driver for these new fuels, it can act as a trigger and catalyst for the broader energy transition, benefiting other sectors of the economy. The P4G-Getting to Zero (GtZ) Coalition Partnership is a two-year project that focuses on shipping decarbonisation business and development opportunities in Indonesia, Mexico and South Africa. To the project’s core is the priority of bringing forward the national voices, priorities and policies around climate change, energy transition, job generation and air pollution. To that end, the P4G-GtZ team detected and engaged with key national and international stakeholders that can provide the current countries’ landscape, diagnostic and synergies around shipping opportunities. Apart from generating a networking space for the different key stakeholders, the project delivered detailed shipping activity maps coupled with energy studies that throw light at which low/zero-carbon fuel offers better feasibility to decarbonise shipping taking into account policy, job generation and international competition. The poster introduces the P4G-GtZ Coalition Partnership and the progress done so far while highlighting key findings around shipping decarbonisation, hydrogen-based fuels potential and energy transitions

Evaluation of activated high volume fly ash systems using Na2SO4, lime and quicklime in mortars with high loss on ignition fly ashes

In general, concretes made with blended Portland cement containing high volumes of fly ash provide an alternative to conventional Portland cement concrete to enable carbon footprint reduction. This study evaluates the chemical activation of four fly ashes in blends with Portland cement, by assessing their effects on hydration and compressive strength. In this study, a sieving process is used to regulate the fly ash composition, which has an effect in the chemistry and reaction of the mix. The results show the importance of the amorphous content of the fly ash with respect to achieving a high compressive strength. The effect of sodium sulfate, added as an activator, is significant in terms of compressive strength at early age for two of the fly ashes studied; in this case, the parameter used to correlate with the compressive strength evolution is the amount of portlandite consumed through pozzolanic reactions. However, sodium sulfate does not have the same effect on fly ashes with a high amount of Fe2O3, in which portlandite consumption is much lower

Teoría de la mente en tareas de falsa creencia y producción narrativa en preescolares: investigaciones contemporáneas/theory of mind in false belief tasks and narrative production in preschoolers: contemporary research

Este artículo presenta una reflexión sobre el desarrollo de la producción narrativa y el de la teoría de la mente en la etapa preescolar. En cada campo se plantean sus bases conceptuales, reportes y evidencias investigativas. Se muestra que en la producción narrativa los niños adquieren de manera relativamente tardía en su primera infancia las primeras habilidades que les permiten organizar una narración para contarla a otros. Se señala, además, que el desarrollo de la teoría de la mente está relacionado con el del lenguaje, aunque se cuenta con menos estudios sobre su relación con la producción narrativa. Se identifica la necesidad de un marco integrador de las explicaciones de las variantes conceptuales y metodológicas planteadas en esta reflexión