Unveiling the frontiers: Historical expansion and modern implications of agricultural land use in Denmark.

This study offers a first-of-its-kind investigation into the spatial and temporal transformation of agricultural land use and expansion in crops and livestock at national scale during the middle and latter half of the 19th century. We introduce an innovative methodological framework that combines historical data with advanced spatial analysis to trace and map the evolution of frontiers of agricultural land use changes, illustrating Denmark's agricultural evolution towards the modern era. Our research uncovers critical shifts in cropland, grazing land, and livestock density offering unprecedented insights into the mechanisms driving agricultural expansion and intensification. The mechanisms driving this expansion and their potential impact on contemporary agroecological challenges linked to land use intensification are explored. Our results point to a significant broadening and shifting of land use frontiers offering a historical perspective on agricultural land use. This sets the stage for promoting the analysis of drivers of change and gaining insights into how landscape development could be steered into an environmentally and societally more desirable and sustainable direction tackling present-day agroecological challenges.

Discordance between farmers and scientists - Perspectives on nitrogen reduction measures in Denmark.

Mitigating nitrogen leaching from agricultural land is imperative for enhancing the ecological status of aquatic ecosystems. Incorporating the knowledge and perceptions of farmers regarding the feasibility and effectiveness of implementing nitrogen reduction measures is vital for increasing the adoption rate of such measures and related policies. Concurrently, the insights and perspectives of scientists advising policymakers on the implementation of these measures can facilitate a more comprehensive understanding of the barriers and potential for implementation. In this study, we employ Q methodology to elucidate the opinions of 11 farmers and 14 key scientists involved in providing contractual science policy advice to Danish ministries on nitrogen reduction measures. Results show that across the perspectives of farmers and scientists, four main factors (viewpoints) can be identified: 'Evidence-driven viewpoints', 'On-farm efficiency-driven viewpoints', 'Hydrological and landscape-scale viewpoints', 'Innovation-based viewpoints. From this, we suggest that within the field of nitrogen mitigation and implementation, there is a general broad division and opposing perspectives between scientists and farmers. The evidence presented here shows that scientists' viewpoints do not correspond to the viewpoints of farmers in most cases. Scientists broadly believe that landscape and long-term measures, especially wetlands, are most effective nitrogen measures, according to scientific evidence. This clashes severely with some farmer participants, who strongly believe that there should be more personal freedom and flexibility to make individual farm level management choices. This is a significant barrier to the uptake of the best possible measures.