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PhD (Queensland University of Technology), Master of Science in Agricultural Engineering (University of Vienna)
Dr Johannes Friedl is a soil scientist in the Sustainable Agriculture program at the Centre for Agriculture and Bioeconomy. His research in the field of environmental and agricultural science links basic process understanding to applied research questions enabling high impact research and real-world outcomes for sustainable management practice adapted to global climate change in both agricultural and natural environments. He is leading development and application of state-of-the-art monitoring methods to trace nutrient cycling and losses in the soil-plant atmosphere system. His work across the Australian beef, dairy, grains, sugar and horticulture industries as well as within international research collaborations develops strategies to mitigate environmentally harmful nutrient losses while maintaining pasture and crop productivity. Research Interest
- Nitrogen/ Carbon turnover in the soil, plant atmosphere system
- Biogeochemistry of plant-soil-microbe interactions in agro-ecosystems
- Biosphere-atmosphere exchange of environmentally important greenhouse gases
- Balance and magnitude of reactive and non-reactive nitrogen losses from soils
- Stable Isotopes in Environmental Sciences
Projects (Chief investigator)
Projects
- Data platform for increasing soil carbon in Australia agricultural systems
- Improving farmer confidence in targeted N management through automated sensing and decision support
- Improving farmer confidence in targeted N management through automated sensing and decision support
- Time controlled Grazing for Soil C sequestration and improved ecosystem services
- Unlocking the true value of organic soil amendments
- Upgrading the agricultural production systems sIMulator (APSIM) nitrogen cycling and loss routines with data from the National Australian Nitrous Oxide Research Program (NANORP)
Additional information
- Friedl, J., Scheer, C., Rosa, D., Müller, C., Grace, P. & Rowlings, D. (2021). Sources of nitrous oxide from intensively managed pasture soils: the hole in the pipe. Environmental Research Letters, 16(6). https://eprints.qut.edu.au/210233
- Friedl, J., Scheer, C., Rowlings, D., Deltedesco, E., Gorfer, M., De Rosa, D., Grace, P., Müller, C. & Keiblinger, K. (2020). Effect of the nitrification inhibitor 3,4-dimethylpyrazole phosphate (DMPP) on N-turnover, the N2O reductase-gene nosZ and N2O:N2 partitioning from agricultural soils. Scientific Reports, 10. https://eprints.qut.edu.au/197945
- Friedl, J., Cardenas, L., Clough, T., Dannenmann, M., Hu, C. & Scheer, C. (2020). Measuring denitrification and the N2O:(N2O + N2) emission ratio from terrestrial soils. Current Opinion in Environmental Sustainability, 47, 61–71. https://eprints.qut.edu.au/205361
- Friedl, J., De Rosa, D., Rowlings, D., Grace, P., Muller, C. & Scheer, C. (2018). Dissimilatory nitrate reduction to ammonium (DNRA), not denitrification dominates nitrate reduction in subtropical pasture soils upon rewetting. Soil Biology and Biochemistry, 125, 340–349. https://eprints.qut.edu.au/126940
- Friedl, J., Scheer, C., Rowlings, D., Mumford, M. & Grace, P. (2017). The nitrification inhibitor DMPP (3,4-dimethylpyrazole phosphate) reduces N2 emissions from intensively managed pastures in subtropical Australia. Soil Biology and Biochemistry, 108, 55–64. https://eprints.qut.edu.au/108680
- Friedl, J., Scheer, C., Rowlings, D., Mcintosh, H., Strazzabosco, A., Warner, D. & Grace, P. (2016). Denitrification losses from an intensively managed sub-tropical pasture - Impact of soil moisture on the partitioning of N2 and N2O emissions. Soil Biology and Biochemistry, 92, 58–66. https://eprints.qut.edu.au/93886
- Takeda, N., Friedl, J., Rowlings, D., De Rosa, D., Scheer, C. & Grace, P. (2021). Exponential response of nitrous oxide (N2O) emissions to increasing nitrogen fertiliser rates in a tropical sugarcane cropping system. Agriculture, Ecosystems and Environment, 313. https://eprints.qut.edu.au/208911
- Clough, T., Cardenas, L., Friedl, J. & Wolf, B. (2020). Nitrous oxide emissions from ruminant urine: Science and mitigation for intensively managed perennial pastures. Current Opinion in Environmental Sustainability, 47, 21–27. https://eprints.qut.edu.au/204723
- Warner, D., Scheer, C., Friedl, J., Rowlings, D., Brunk, C. & Grace, P. (2019). Mobile continuous-flow isotope-ratio mass spectrometer system for automated measurements of N2 and N2O fluxes in fertilized cropping systems. Scientific Reports, 9. https://eprints.qut.edu.au/198219
- De Rosa, D., Rowlings, D., Fulkerson, B., Scheer, C., Friedl, J., Labadz, M. & Grace, P. (2020). Field-scale management and environmental drivers of N2O emissions from pasture-based dairy systems. Nutrient Cycling in Agroecosystems, 117(3), 299–315. https://eprints.qut.edu.au/200240