The use of plant-based compost has been increasing within environmentally sustainable crop systems, as its incorporation into soil improves its structure and implies a slow release of nutrients to the plants. Due to the limited literature regarding compost application to industrial crops and the important role of the soil type, research was conducted on the industrial tomato (Solanum lycopersicum L.) hybrid Coronel F₁ at the Department of Agricultural Sciences of Naples, University Federico II, in 2019 and 2020. The study was based on the factorial combination of three fertilization types (compost, compost + mineral, and mineral) and three soil textures (clayey, loamy, and sandy). The highest crop yield was observed in loamy soil with mineral fertilization (+12.7% compared to clayey and loamy soils; +12.1% and +60.3% compared to compost + mineral and compost, respectively). Compost application increased plant dry weight (+23% compared to mineral fertilization), while sandy soil had a lower dry residue (−3%). The combination of loamy soil and compost exhibited the highest fruit dry matter percentage (approximately 7%). These findings suggest that applying compost to industrial tomato plants, alone or with mineral fertilizers, improves fruit quality and promotes crop system sustainability, and the optimal strategy depends on the target crop and soil type.

The transition towards energy efficiency measures and green energy sources is strongly fostered by the European Union. Italy is among the EU countries that have heavily invested in renewable energy sources, more than doubling their share in gross final energy consumption. In particular, biogas has a pivotal role in the generation of electricity and can also be upgraded into biomethane, with a higher and more stable energy content. In this study, the sustainability of the supply chain of electricity from biogas in Italy has been thoroughly analyzed in the broader framework of the ARCADIA (Life Cycle Approach in Public Procurement and Italian LCA Database for Resource Efficiency) project. The environmental assessment, carried out by means of Life Cycle Assessment (LCA), provides a two-fold perspective. Firstly, it allows us to identify the main hotspots of the investigated system, such as the cultivation of dedicated crops, and to provide useful insights for improving environmental performance. Furthermore, a focus on the modeling of the dataset related to the production of electricity from biogas within the Italian electricity mix represents a step ahead in the LCA research, filling the lack of site-specific databases for reliable LCA results.

The European Union is targeting climate neutrality by 2050, with a focus on enhancing energy efficiency, expanding renewable energy sources, and reducing emissions. Within Italy’s electricity mix, bioenergy sources, namely biogas, solid biomass, and bioliquids, play a crucial territorial role. A comparative analysis was conducted through Life Cycle Assessment (LCA), utilizing national data from the ARCADIA project, to assess the environmental sustainability of the investigated bioenergy chains and identify the most convenient ones. The study revealed that, among the bioenergy sources, solid biomass emerges as the most environmentally friendly option since it does not rely on dedicated crops. Conversely, biogas shows the highest environmental impact, demonstrating less favorable performance across nine out of the sixteen evaluated impact categories. The LCA underscores that the cultivation of dedicated energy crops significantly contributes to environmental burdens associated with electricity generation, affecting both biogas and bioliquids performance. The cultivation process needs water and chemical fertilizers, leading to adverse environmental effects. These findings highlight the importance of prioritizing residual biomass for energy generation over dedicated crops. Utilizing forestry and agro-industrial residues, municipal solid waste, and used cooking oils presents numerous advantages, including environmental preservation, resource conservation and recovery, as well as waste reduction.