ABSTRACT.- The identification of optimal rotation length of forest crops considering production and environmental perspectives is a major concern for eucalypts since plantations costs are high and nutrient extraction is considerable. This study assessed biomass productivity, energy yield and nutrient use efficiency of E. benthamii,E. dunnii and E. grandis plantations for energy purposes, with densities of 2220, 3330, 4440 and 6660 trees.ha−1 in the first rotation during a period of 76 months.
ABSTRACT.- The identification of optimal rotation length of forest crops considering production and environmental perspectives is a major concern for eucalypts since plantations costs are high and nutrient extraction is considerable. This study assessed biomass productivity, energy yield and nutrient use efficiency of E. benthamii,E. dunnii and E. grandis plantations for energy purposes, with densities of 2220, 3330, 4440 and 6660 trees.ha−1 in the first rotation during a period of 76 months.
El presente artículo pone el foco en los principales aspectos para una incorporación progresiva y sustentable del riego en sistemas pastoriles, analizando resultados de la investigación nacional a nivel de pasturas y carne y su relación con las capacidades de infraestructura y agua almacenada.
El riego es una tecnología en expansión que permite aumentar el rendimiento de los cultivos. Si bien el aumento de productividad es la razón principal para la adopción del riego, para una correcta evaluación de su impacto ambiental es necesario conocer su efecto en otras propiedades de los agroecosistemas. El objetivo de este artículo es discutir el efecto de mediano plazo del riego sobre el carbono orgánico del suelo.
En este artículo se presentan avances de una línea de investigación que analiza la dinámica del nitrógeno en el sistema suelo-planta-animal-atmósfera, con el objetivo de cuantificar las emisiones de N2O provenientes de la orina de ganado lechero y su relación con el contenido de nitrógeno en leche.
ABSTRACT.- Humans place strong pressure on land and have modified around 75% of Earth's terrestrial surface. In this context, ecoregions and biomes, merely defined on the basis of their biophysical features, are incomplete characterizations of the territory. Land system science requires classification schemes that incorporate both social and biophysical dimensions.
ABSTRACT.- The Río de la Plata Grasslands (RPG) region is the largest area of the temperate humid and sub-humid grasslands biome in South America and one of the largest in the world. The region is located on fertile soils, generally very suitable for agricultural development, so it is undergoing an intense land cover change process. Our knowledge of these changes remains incomplete. Most regional-scale studies have been conducted over specific periods, limited subsets of the RGP, coarse resolution and, in general, used land cover classes that are not readily compatible.
ABSTRACT.- The Río de la Plata Grasslands (RPG) region is the largest area of the temperate humid and sub-humid grasslands biome in South America and one of the largest in the world. The region is located on fertile soils, generally very suitable for agricultural development, so it is undergoing an intense land cover change process. Our knowledge of these changes remains incomplete. Most regional-scale studies have been conducted over specific periods, limited subsets of the RGP, coarse resolution and, in general, used land cover classes that are not readily compatible.
Abstract. A rapidly growing population in a context of land and water scarcity, and climate change has driven an increase in healthy, nutritious, and affordable food demand while maintaining the current cropping area. Digital agriculture (DA) can contribute solutions to meet the demands in an efficient and sustainable way. South America (SA) is one of the main grain and protein producers in the world but the status of DA in the region is unknown.