Aplicación de un subproducto del procesamiento de guayaba en un Ultisol, en presencia y en ausencia de fertilización mineral

There is a relative lack of technical studies on the adequate management of organic wastes from food processing. The aim of this study was to evaluate the effect of applying doses of a byproduct from guava processing, in the presence and absence of mineral fertilization, on the fertility of a an Ultisol (or Red-Yellow Argisol) under laboratory conditions. An entirely randomized 5x2 factorial experimental design was used with five byproduct doses, in the presence and absence of mineral fertilization, with four repetitions, for a total of 40 experimental units. Under the experimental conditions, the attributes pH, OM, K, Mg, BS, T, V, B, Fe, Zn and S-SO42- were affected by the guava byproduct doses, as well as by the presence or absence of mineral fertilization. With the use of this fertilization, the variables OM, K, H+Al, T, Fe and Zn increased more as a function of byproduct dose than in the absence of fertilization. The results obtained demonstrate the potential of using this waste material in the cycling and supply of nutrients.

Las imágenes fotográficas de América Latina en O Cruzeiro Internacional

Assuming that photographic images involve a process of aestheticization of events that is related to the construction of social identities, organizing the sensible and promoting standards and norms of behavior, the aim of this article is to study how the identity of Latin America was represented in the magazine O Cruzeiro Internacional from a study of photo reports published in this journal. In this article, we will explore the editorial project of this publication and we will study how this project was materialized in specific photo reports. These photo reports engendered a number of stereotypes about Latin America, linked to the American way of life and its values of development and consumption.