John Nyameasem
PostDoc
I am immersed in studying nitrogen and carbon emissions, as well as nitrogen leaching, within agricultural systems. My research focuses on developing strategies to mitigate these environmental impacts while ensuring sustainable crop production. Through extensive experimentation, meticulous data analysis, and advanced modelling techniques, I aim to uncover effective management practices that minimize nitrogen and carbon emissions and reduce nitrogen leaching into the environment. With a thorough understanding of the intricate dynamics of nitrogen and carbon cycles within farming systems, I am dedicated to crafting actionable solutions that promote environmental health and agricultural sustainability.
BLE project smartMaN2agement (Site-specific modelling of N dynamics to reduce gaseous N emissions and other N losses in crop production).
The project focuses on reducing N2O and NH3 emissions and N leaching through predictable, informed, and site-adapted management in crop production. Long-term experiments, selected for sampling and modelling, cover key management practices such as crop rotation with catch crops, tillage with mulching of high-N crops, and various mineral and organic fertilization methods. The project emphasizes modelling, utilizing extensive data from long-term trials to validate the models, aiming for a comprehensive evaluation. During the project, we will derive well-founded statements on the impacts of different farming systems, crop rotations, soil tillage, and fertilization practices tailored to specific locations and farming systems. These findings will be regionalized to the federal territory and processed for practical agricultural application and consulting.
Taube, F., Nyameasem, J. K. & Verma, S. (2024). The role of grasslands in mixed farming/crop-livestock systems. In Advances in temperate grassland science and management (ed. Dr Agnes van den Pol-van Dasselaar). Burleigh Dodds Series in Agricultural Science (In press).
Nyameasem, J. K., Taube, F., Kluß, C., Neumann, S. & Reinsch T. (2024). The effects of fertilizer pretreatment on nitrogen cycling in an intensively managed temperate grassland. Agriculture, Ecosystems & Environment, 375: 109185. https://doi.org/10.1016/j.agee.2024.109185
Nyameasem, J. K., De Los Rios, J., Kluß, C., Reinsch, T., Poyda, A., Taube, F., et al. (2024). Incorporating leys in arable systems as a mitigation strategy to reduce soil organic carbon losses during land-use change. Front. Environ. Sci. 12. https://doi.org/10.3389/fenvs.2024.1399197
Taube, F., Nyameasem, J. K., and Fenger, F. (2024). “Closed-loop combined crop-livestock farming systems” In Developing circular agricultural production systems (Editor: Barbara Amon). Burleigh Dodds Series in Agricultural Science 135: 335-64. https://www.taylorfrancis.com/books/edit/10.1201/9781003412052/developing-circular-agricultural-production-systems-barbara-amon
Taube, F., Nyameasem, J. K., Fenger, F., Alderkamp, L., Kluß, C., and Loges, R. (2024). Eco-efficiency of leys—The trigger for sustainable integrated crop-dairy farming systems. Grass Forage Sci. 79:108–119. https://doi.org/10.1111/gfs.12639
Nyameasem, J. K., Ruser, R., Kluß, C., Essich, C., Zutz, M., ten Huf, M., et al. (2023). Effect of slurry application techniques on nitrous oxide emission from temperate grassland under varying soil and climatic conditions. Grass and Forage Science 78, 338–358. https://doi.org/10.1111/gfs.12612
Nyameasem, J. K., Zutz, M., Kluß, C., Huf, M. ten, Essich, C., Buchen-Tschiskale, C., et al. (2022). Impact of cattle slurry application methods on ammonia losses and grassland nitrogen use efficiency. Environmental Pollution 315, 120302. https://doi.org/10.1016/j.envpol.2022.120302
Nyameasem, J. K., Ben Halima, E., Malisch, C. S., Razavi, B. S., Taube, F., and Reinsch, T. (2021). Nitrous Oxide Emission from Forage Plantain and Perennial Ryegrass Swards Is Affected by Belowground Resource Allocation Dynamics. AGRONOMY-BASEL 11. https://doi.org/10.3390/agronomy11101936
Nyameasem, J. K., Malisch, C. S., Loges, R., Taube, F., Kluß, C., Vogeler, I., et al. (2021). Nitrous Oxide Emission from Grazing Is Low across a Gradient of Plant Functional Diversity and Soil Conditions. Atmosphere 12, 223. https://doi.org/10.3390/atmos12020223
Nyameasem, J. K., Reinsch, T., Taube, F., Domozoro, C. Y. F., Marfo-Ahenkora, E., Emadodin, I., et al. (2020). Nitrogen availability determines the long-term impact of land use change on soil carbon stocks in the grasslands of southern Ghana. SOIL 6, 523–539. https://doi.org/10.5194/soil-6-523-2020
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