Are organics more nutritious than conventional foods? A comprehensive systematic review

The growing consumer interest fueled by the belief in the superiority of organic foods raises questions about their actual nutritional superiority over conventional ones. This assumption remains a controversial issue. The present study addresses scientific evidence to clarify this controversy and provide relevant insights for informed decision-making regarding dietary choices. We collected 147 scientific articles containing 656 comparative analyses based on 1779 samples of 68 vegetable, fruit, and other (cereals, pulses, etc.) foods, 22 nutritional properties, and nine residues. Results show that in 191 (29.1%) comparisons, there were significant differences between organic and conventional foods. In a similar quantity of cases (190; 29.0%), there were divergences in the results since some studies reported significant differences while others did not. Finally, most of the comparative analyses (275; 41.9%) showed no significant difference between organic and conventional foods. Therefore, the results herein show no generalizable superiority of organic over conventional foods. Claims for nutritious advantages would eventually be applied to specific comparisons, depending on the food type and nutritional parameter.

Perception of Brazilian Agricultural Sciences Students on Animal Welfare: A Profile-based Approach

The agricultural professionals are ethically obligated to provide good care for the animals under their care. We analysed Brazilian agricultural science students' profiles based on their perceptions of animal welfare (AW). The survey included 239 students from agronomy, animal science, and veterinary courses in 44 universities. A factor analysis and a cluster analysis identified four students' profiles. "The farm animal stewards" group (n= 79) focused their perceptions of AW on basic health and functioning as a basis for meat, wool, egg, and dairy production, while the "the industrial view" group (n= 15), in the profitability and economic factors. "The animal rights position" (n= 76), in the face of conflicting interests (animals vs. owners), perceive that the animal's interest should prevail and give an equal treatment for all species. "The balanced" group (n= 69) incorporates concepts from animal and human to explain their perceptions. The students' perception of AW is multifaceted and influenced by value-based ideas about what is important or desirable for animals and all stakeholders. Scientific fields focusing on AW need to be emphasized within agricultural science curriculum.

A Bibliometric Network Analysis of Recent Publications on Digital Agriculture to Depict Strategic Themes and Evolution Structure

The agriculture sector is one of the backbones of many countries’ economies. Its processes have been changing to enable technology adoption to increase productivity, quality, and sustainable development. In this research, we present a scientific mapping of the adoption of precision techniques and breakthrough technologies in agriculture, so-called Digital Agriculture. To do this, we used 4694 documents from the Web of Science database to perform a Bibliometric Performance and Network Analysis of the literature using SciMAT software with the support of the PICOC protocol. Our findings presented 22 strategic themes related to Digital Agriculture, such as Internet of Things (IoT), Unmanned Aerial Vehicles (UAV) and Climate-smart Agriculture (CSA), among others. The thematic network structure of the nine most important clusters (motor themes) was presented and an in-depth discussion was performed. The thematic evolution map provides a broad perspective of how the field has evolved over time from 1994 to 2020. In addition, our results discuss the main challenges and opportunities for research and practice in the field of study. Our findings provide a comprehensive overview of the main themes related to Digital Agriculture. These results show the main subjects analyzed on this topic and provide a basis for insights for future research.

A review and some reflections on farmers' adoption of sustainable agricultural practices worldwide

A large body of empirical studies has focused on understanding the factors that influence the adoption of sustainable agricultural practices (SAP). We review 63 papers on this subject and analyze which factors influence, positively or negatively, the adoption of SAP. We categorize these factors in "farmer and farm household characteristics," "farm general characteristics," "farm financial/management characteristics," "exogenous factors," "attributes of SAP," and "psychological factors." We found that a majority of the reviewed papers neglected the inclusion of psychological factors to model farmers' decisions to adopt. Moreover, in the reviewed papers that included psychological factors, the constructs (i.e., farmers' perception) were poorly measured. Future research should consider the development of a "systemic approach," including farmers' socioeconomic characteristics and psychological factors, to better understand the adoption of SAP. By including psychological factors, we advise researchers to examine a set of statements, as this strategy might provide improvements in psychological measurements.