Gadamerian philosophical hermeneutics and the laudanian perspective of research traditions in agronomy

Agronomic science or technoscience has an important role in contemporary times and is the focus of necessary philosophical investigations. The present study aimed to relate Gadamerian philosophical hermeneutics with the Laudanian concept of philosophy of science, also applied to the philosophy of technology within the agronomic context. The central question to be answered is: can Gadamerian philosophical hermeneutics apply to the understanding of agronomy? Given this, central references and commentators were selected, dividing the dialogue between the authors and the argumentation into the following points: sciences, technologies, and Gadamerian philosophical hermeneutics; agronomic traditions and their Laudanian progress; reaching the final possibility of intersections between Gadamer and Laudan, when reflecting on agronomy, especially on the theme of traditions.A ciência ou tecnociência agronômica possui relevante papel na contemporaneidade, sendo, portanto, foco de necessárias investigações filosóficas. O presente trabalho tem por objetivo relacionar a hermenêutica filosófica gadameriana com a concepção laudaniana de filosofia da ciência, aplicada também a filosofia da tecnologia, dentro do contexto agronômico. Em que a questão central a ser respondida é: a hermenêutica filosófica gadameriana pode ser aplicável ao entendimento da agronomia? Face a essa problemática, foram selecionadas bibliografias centrais e comentadores, dividindo o diálogo entre os autores e a argumentação nos seguintes pontos: ciências, tecnologias e hermenêutica filosófica gadameriana; tradições agronômicas e seu progresso laudaniano; chegando à possibilidade final de interseções entre Gadamer e Laudan, no refletir sobre a agronomia, em especial, na temática de tradições

Soybean growth and production under straw of maize, Urochloa brizantha, Conyza spp. and Digitaria insularis

Weeds can cause serious damage during soybean development, due to allelopathy, competition for water, light and nutrients. It is necessary to investigate the influence of straw, of weeds Conyza spp. and Digitaria insularis, in soybean growth, production and composition and grains. If there is influence of allelopathic compounds at the crop. The aim of this study was to evaluate the influence of straw of maize and Urochloa brizantha (A.Rich.) R.D.Webster crops and Conyza spp., D. insularis, on growth, production and composition of grains produced by soybean. Treatments consisted of the control (absence of straw), maize straw, Urochloa brizantha straw, Conyza spp. straw (500, 1000, 1500 or 2000 kg ha-1) and D. insularis straw (500, 1000, 1500 or 2000 kg ha-1). The chlorophyll index, height of plants and insertion of the first pod, stem diameter at the collar and at 5 cm from the collar, root dry mass, number of pods and grains, weight of total grains, weight of 100 grains, protein and nitrogen (N), catalase and peroxidase contents in grains were evaluated. There was no difference between treatments for plant height, first pod height and chlorophyll index, as well as for total pods and 100 grain weight and protein content, N content and peroxidase and carboxylase enzymatic activity of the grains produced. For stem diameter, a higher value was found for the treatment with maize straw compared to the control (no straw). For dry root matter, treatments without straw and with Conyza spp. straw up to 1500 kg ha-1, differed from the treatment with maize straw. Even in some respects they provided beneficial effects compared to the absence of straw, which indicates the importance of crop residues. No allelopathic effects of weeds were observed on the growth and development of soybean. Conyza spp., D. insularis, maize or U. brizantha straws do not negatively affect soybean growth, production and grain composition

Outcomes in Newly Diagnosed Atrial Fibrillation and History of Acute Coronary Syndromes: Insights from GARFIELD-AF

BACKGROUND: Many patients with atrial fibrillation have concomitant coronary artery disease with or without acute coronary syndromes and are in need of additional antithrombotic therapy. There are few data on the long-term clinical outcome of atrial fibrillation patients with a history of acute coronary syndrome. This is a 2-year study of atrial fibrillation patients with or without a history of acute coronary syndromes