This research project was focused in minimizing inorganic arsenic levels in polished rice grain while maintaining crop yield and water productivity of the most planted Indica cultivar in Uruguay, INIA Merin. Two experiments were conducted during seasons 2018-2019 and 2019-2020.

The occurrence of climate variations known as ENSO phases are caused by anomalies in ocean surface temperature in the so-called Niño 3.4 region in the Central Equatorial Pacific. These anomalies are officially used by NOAA (U.S. National Oceanic and Atmospheric Administration) to define whether there is a probability of occurrence of a La Niña, El Niño or neutral phase with global impact. In Uruguay, South America, the impact of climatic variations associated with ENSO phases on agricultural and pasture production is well known.

ABSTRACT.- The intensification of irrigated rice production systems requires a comprehensive assessment of the environmental impact of pesticide use. Here, we investigated the behavior of the herbicide glyphosate (GLY) and its metabolite aminophosphonic acid (AMPA), throughout four rice rotations (continuous rice cropping (RC), ricesoybean (R-S), rice-short term pasture (R-PS) and rice-long term pasture R-PL) reflecting different agricultural intensification scenarios in a long-term experimental (LTE) site. © 2025 Elsevier B.V.

In Uruguay, flooded rice historically rotated with perennial pastures (mix of grasses and legumes) for livestock production. Business as usual consisted basically in two years of rice crops followed by two to four years of grazed pastures. This allowed increased yields, diversified incomes, preserved natural resources, and minimized the use of pesticides and fertilizers.

While agriculture is crucial to feeding people, it is strongly impacted by climate change and variability, and also contributes to it. Agriculture and land use change are responsible for around ¼ of greenhouse gas emissions from human activities(1). Climate change already impacts the quantity, quality and geographic distribution of food production from agriculture. In this special issue, entitled "Climate change and variability impacts on agriculture", the selected articles address different issues.

Guía de la presentación: Resistencia de malezas a herbicidas en UY. -- Los yuyos colorados. -- Amaranthus hybridus en la región. -- Opciones de manejo. -- Consideraciones finales.

ABSTRACT.- The antifungal activity of Chenopodium ambrosioides essential oil against Penicillium digitatum was evaluated in vitro (liquid phase) and in vivo on artificially inoculated Okitsu Satsuma mandarin (Citrus unshiu). In vitro, the essential oil exhibited a fungicidal effect, with 100% effectiveness at a minimum inhibitory concentration of 29 uL/mL, and a minimum fungicidal concentration of 125 uL/mL. However, in vivo, P. digitatum grew on over 80% of treated fruit, showing no significant

Rice (Oryza sativa L.) systems rotated with perennial pastures have intensified in South America. The study underscores the importance of considering multiple factors when transitioning from integrated rice-pasture rotations to continuous cropping systems.

ABSTRACT. - Zygote microinjection is considered the most suitable technique to introduce CRISPR/Cas9 reagents for efficient genome editing in livestock. In this study, zygote electroporation was evaluated as an alternative to microinjection for CRISPR/Cas9-mediated genome editing in sheep. Four experiments were conducted on 3548 cumulusoocyte complexes. Acid Tyrode's solution (AT) was used to partially degrade the zona pellucida (ZP) to improve reagent entry, resulting in ZP thinning with longer AT exposure (P < 0.05).

ABSTRACT.- The use of alternative waste products as organic soil amendments has become increasingly important for researchers and the industrial sector, as they promote environmental protection and sustainable development. The objective of this study was to assess phytotoxicity of different pulp industry sludge rates applied to two soils as soil amendment, based on their effects on seed germination and radicle elongation of tall fescue (Festuca arundinacea) and common wheat (Triticum