Sustainable and circular agro-environmental practices: A review of the management of agricultural waste biomass in Spain and the Czech Republic.

Sustainable and circular production models, such as the circular economy and circular bioeconomy, have become key mechanisms to leave behind the traditional linear model of food production. Under this approach and considering the waste biomass potential available in Spain and the Czech Republic, the main objective of this study is to analyse the most relevant aspects of the generation, use and regulation of agricultural waste biomass (AWB) in both countries. For this purpose, a scientometric analysis and systematic review of published research in the Scopus database were carried out. A complementary analysis of AWB management policies and regulations was also part of the methodology. The results show that Spain has published almost twice as much research as the Czech Republic. Furthermore, 91% of the retrieved research prioritizes the characterization and estimation of the potential of more than 15 AWB types. Among the main ones are olive residues, horticultural residues and wheat straw, which are used for producing organic amendments, bioenergy and biofuels. The results confirm that the reduction and valorization of AWB is an issue that has become more important in the last 13 years, mainly due to the policies and strategies for circular economy and circular bioeconomy. With this in mind, this study provides relevant information for governments on the aspects that need to be improved to advance in the valorization of AWB. This study also provides guidance to farmers on the reduction and/or recovery alternatives that they can implement to move towards sustainable and circular agriculture.

Sustainability and circularity in fruit and vegetable production. Perceptions and practices of reduction and valorization of agricultural waste biomass in south-eastern Spain.

This study aims to conduct an exploratory and comparative analysis between Fruit and Vegetable Producer Organizations (FVPOs) and fruit and vegetable producers that are not part of these organizations (Non-FVPOs) regarding the prioritization, perception, and adoption of sustainable and circular practices. For this purpose, data was collected from both groups through an online survey. Statistical techniques for the comparison of two independent groups (chi-square test, Fisher's exact test, and Mann-Whitney U test) were used to examine the differences on a sample of 14 FVPOs and 22 Non-FVPOs from Spain. Although the results show more similarities than differences between the two groups, they highlight that FVPOs are more likely to prioritize environmental factors and implement both green manuring and biodegradable raffia as the main Agricultural Waste Biomass (AWB) reduction and/or valorization practices. In addition, the findings point to the relevance of environmental considerations and specifically to the Sustainable and Circular Production Models (SCPMs) as an alternative to the traditional fruit and vegetable production system. Theoretically, the results mainly contradict resource and first mover advantage arguments by revealing that more resourceful organizations do not necessarily possess better environmental management. This study also provides innovative information and relevant contributions for governments. It allows them to identify aspects that should be strengthened in relation to policies, regulatory frameworks, and/or strategies that promote sustainable and circular production systems for both FVPOs and Non-FVPOs. In addition, it contributes with implications, for organizations and farmers, how to improve actions and opportunities to advance the transition to SCPMs.

Management of the Organic Fraction of Municipal Solid Waste in the Context of a Sustainable and Circular Model: Analysis of Trends in Latin America and the Caribbean.

The main objective of this research is to analyze the most relevant aspects of the management of the organic fraction of municipal solid waste (OFMSW) and the Sustainable and Circular Production Models (SCPMs) in Latin America and the Caribbean (LAC). The bibliometric method was used for the analysis of 190 studies obtained from the Scopus and Latin America and The Caribbean on Health Sciences (LILACS) databases. The systematic review provided information on the main research approaches: identification and characterization; quantification; strategic and interdisciplinary management; and processes for treatment or valorization. Finally, an evaluation of public policies and strategies was performed. The results show that Brazil, Mexico, and Colombia have the highest number of publications on OFMSW. The findings also indicate that both research and policy strategies on SCPMs prioritize bioenergy and biofuels as the leading alternatives for the valorization of OFMSW. It also reflects the relevance of the Circular Economy (CE) and Bioeconomy (BE) as the main drivers of waste recovery and/or valorization in LAC. These aspects are of great interest to governments that are still in the process of implementing SCPMs. However, for those more advanced in this area, it provides valuable information on progress, policy effectiveness, and future actions for improvement.

Analysis of the Circular Economic Production Models and Their Approach in Agriculture and Agricultural Waste Biomass Management.

As of now, circular economic production models of the circular economy (CEPMs), which include circular economy, bioeconomy, and circular bioeconomy, are among the main tools characterizing development policies in different countries. During the last five years, policies and strategies regarding CEPMs have promoted and contributed to the development of research on this topic. The evolution and most relevant aspects of the three CEPMs previously mentioned have been analyzed from a sample of 2190 scientific publications obtained from the Scopus database. Bibliometric analysis has been used to evaluate the approach of these models in agriculture and to introduce the ways in which they address the management of agricultural waste biomass (AWB). Results show that the circular economy is the most studied and prioritized model in China and most European countries, with the UK leading the way. Germany leads in topics related to the bioeconomy. The management policies and strategies of the circular bioeconomy are key to promoting research focused on AWB valorization since bioenergy and/or biofuel production continue to be a priority.