Among other agricultural systems that can contribute to sustainable food production, hydroponic systems are constantly gaining attention in terms of their economic viability and sustainability, while their ability to produce nutritious food has become more apparent in recent decades. The purpose of the study is to shed light on the potential of hydroponics to conduce sustainable food production systems, by focusing on the economic evaluation of a hydroponic greenhouse farm located in Western Greece. Particularly, the study aims at presenting an investment plan for a greenhouse farm of a total acreage of 0.2 hectares, where fresh tomato will be produced via hydroponic methods. The appraisal of the economic viability of the investment plan covers a 5-year period, while the Net Present Value (NPV) and the Internal Rate of Return (IRR) are used as criteria of feasibility and performance assessment. The study uses detailed technical and economic data—related to all costs and benefits deriving from the annual operation of the greenhouse farm—to assess three different economic feasibility scenarios based on the range of input, energy and product prices, taking into account the high volatility governing agricultural markets. The results show that economic viability is achieved during the 5-year assessment period in most scenarios, which is mainly due to the efficiency of the hydroponic systems. Investment performance indicators are adverse only for an “extreme” scenario with increased installation and production costs that are not counterbalanced by higher product prices or by financial support from the State. Despite the promising perspectives of hydroponics in Greece, its use is not yet widespread within the country. Further research should explore ways to increase adoption of such production methods, considering that immediate action is needed worldwide to improve the resilience of the food industry and promote environmentally friendly food production systems.

Legume crops, the production of which is related to their use in animal nutrition (referred to in this study as “legumes for livestock—LL” and include species such as bean, lupin, pea, vetch and clover), have positive effects on the economic performance of farms and environmental outcomes, although their relation to sustainable weed management practices (SWMP) has received limited attention. The expansion of LL in Europe is limited due to market constraints, despite important policy incentives. This study was designed to investigate whether a policy-oriented Scenario (S1) or a market-based Scenario (S2) could induce the expansion of the cultivation of LL as well as to examine the possible impact on the economic performance of farming systems, including cost savings related to pest management. A farm typology was developed according to the level of expenses of farms for crop protection and their implemented SWMP. Using technical and economic data from 45 farms that cultivate annual arable crops in Greece, with special emphasis on LL, a Linear Programming model was constructed to examine the potential role of each one of the three identified farm types in the expansion of LL in Central Greece (Baseline Solution—BS). Following the BS, the effects of the two Scenarios were examined through a Price Parametric Programming approach. The solutions revealed that the valorization of LL had a significant economic potential for all farm types. In addition, it was found that a substantial policy incentive of increasing the coupled payments of LL by 128% (S1) can have an equivalent impact on the expansion of LL as modest levels of market interventions—through the achievement of higher yields or/and higher selling prices—to increase the revenues of LL by 59% (S2). Farms that relied more on chemical pesticides could play a more decisive role in expanding LL. The novel aspect is related to the investigation of the economic performance of different farm types cultivating LL with a specific focus on potentially higher profitability related to SWMP. Furthermore, this study contributed to the “policy versus market solutions” debate toward the expansion of LL.

Sustainable Weed Management Practices (SWMPs) are currently underrepresented in European cropping systems despite considerable attention from the research and policymaking communities. In public discourse, their adoption is associated with low yields, high initial investment costs, additional machinery requirements, elevated labor demands and limited or uncertain profitability. Nevertheless, little is known regarding their economic effects when implemented under real-life conditions at the farm level. This study aims to determine the impact of SWMPs against broomrape parasitism on the organization, management and economic performance of industrial tomato farms, considering that broomrapes (Orobanche and Phelipanche species) are a major impediment to the expansion of key crops in the Mediterranean basin due to their resistance toward commonly applied herbicides. For the purpose of economic appraisal, detailed technical and economic data were collected in 2022 from 76 arable farms cultivating industrial tomato in the Region of Thessaly in Central Greece. By combining Principal Component Analysis (PCA) with Two-Step Cluster Analysis (TSCA), a farm typology according to the implementation level of different SWMPs was developed. Based on this typology, a comparative technical and economic analysis revealed important differences in terms of structure, resource utilization and economic performance across the various farm types. “Holistic” farms, which exhibited the highest adoption levels of SWMPs, implemented an effective broomrape management strategy and achieved superior economic outcomes, evidenced by a remarkable net profit of 488.5 €/ha. Conversely, this was either negative or nearly negligible in farm types characterized by low adoption rates, indicating a lack of economic viability in the long run. The findings of this study offer useful recommendations for farm-level decision making, advisory support and policy design toward the promotion of SWMPs.

Sustainable nitrogen (N) management in agriculture is one of the most important issues affecting the environmental performance of modern agriculture. It is actually well perceived that coordinated efforts and holistic approaches are required to regulate N use by farmers. The purpose of this study was to provide an initial examination of stakeholders’ views in Japan regarding N use in agriculture and challenges to increase its sustainability. The analysis was based on a questionnaire study of five types of stakeholders (farmers, advisors, researchers, suppliers, policy makers). By means of multivariate analysis techniques it was revealed that consensus was lacking either in the acknowledgment of the causes and effects of unsustainable N management or in the challenges that need to be addressed. N losses from farms and the effects of N use were perceived but not conceived equally by all stakeholders. Organic farming and mandatory measures were the most controversial challenges, while those involving awareness, training and advisory were the most popular. This study cannot provide safe conclusions that can be generalized in the Japanese context, but it indicates domains where further research is required and orientations for future policy design towards more sustainable N use.

Societal awareness, demand for innovative food systems and increasing herbicide resistance have induced policy, regulatory and research actions towards the adoption of sustainable weed management, which is based on sustainable, integrated and ecological principles. The study investigates farmers’ perceptions with regard to sustainable weed management, considering that the adoption of relevant practices depends on a set of farmer-specific and innovation-specific attributes. To achieve this purpose, an on-site survey was conducted in Greece and Tunisia based on a structured questionnaire, which was completed by 105 arable farmers in total. The questionnaire was designed to record farmers’ opinions and preferences regarding aspects related to sustainable weed management, such as innovation and the decision making process. Using descriptive statistics methods, the study pinpointed significant differences between the responses of Greek and Tunisian farmers due to their particular needs and characteristics, suggesting thus the integration of targeted approaches towards the expansion of sustainable weed management.

Farm Advisory constitutes one of the most important tools to support rural development in the European Union and is also an integral part of Agricultural Knowledge and Innovation System (AKIS). The purpose of this paper is to present the results of the evaluation of the two calls for certification of Farm Advisors in Greece, which were addressed to individuals. The evaluation was based on a questionnaire survey of candidates who participated to the online certification procedure. The analysis is based on descriptive statistics methods and shows that overall most respondents were satisfied with most Modules, although they suggest to provide better links between scientific evidence and practical applications. Although there are serious limitations that do not permit to draw generalized conclusions, the evaluation procedure pointed out specific domains that require improvements and, especially, that a more robust evaluation system is required.