- Ph.D. in Soil Science, University of Alberta, Canada

- M.S. in Engineering, Chonnam National University, Korea

- B.S., Chonnam National University, Korea

Sep 2019 – Present: Professor, Department of Agricultural Engineering, Jeonbuk National University, Korea
Jan 2023 – Present: Expert Member, Presidential Commission on Green Growth and Carbon Neutrality
Mar 2023 – Present: Climate Change Expert Member, Korea Rural Community Corporation (KRC)
Jan 2022 – Present: Honorary Researcher, Reclaimed Land Agriculture Team, National Institute of Crop Science (NICS)
Jan 2023 – Present: Research Secretary, Korean Society of Environmental Agriculture (KSEA)
Jun 2020 – Present: Director & Editorial Secretary, Korean Society of Soil Science and Fertilizer (KSSSF)
Dec 2018 – Present: Editorial Board Member, Communications in Soil Science and Plant Analysis
Oct 2015 – Aug 2019: Postdoctoral Researcher, University of Alberta, Canada

- Investigation of Material Cycling Structures Using Carbon and Nitrogen Stable Isotope Techniques
- Development of Technologies to Enhance Soil Carbon Sequestration for Climate Change Mitigation
- Evaluation of Nutrient Use Efficiency and Optimization of Fertilization Strategies by Crop Type
- Soil Improvement and Carbon Storage Assessment Using Biochar
- Development of Soil Management Techniques for Reclaimed Lands

1. Performance Evaluation and Analysis of the Agricultural Environment Conservation Program. Korea Rural Community Corporation (KRC). Aug 2023 – Dec 2023.
2. Policy Research on Expansion and Reorganization Plans for the Agricultural Environment Conservation Program. Korea Rural Community Corporation (KRC). Jul 2023 – Jun 2024.
3. Development of a Commercialization Model for the Dissemination of Biochar in Agricultural Fields. National Institute of Agricultural Sciences (NAS). Apr 2023 – Dec 2027.
4. Development of Field Layout Management Technology for Preventing Salt and Moisture Damage in Large-Scale Reclaimed Farmland. National Institute of Crop Science (NICS). Apr 2023 – Dec 2027.
5. Advancement of Fertilizer and Water Prescription Program for Upland Crops. National Institute of Agricultural Sciences (NAS). Jan 2023 – Dec 2027.
6. Study on Identifying Implementation Activities and Measuring Effectiveness of the Agricultural Environment Conservation Program. Korea Rural Community Corporation (KRC). May 2022 – Nov 2022.
7. Development of Nutrient Accumulation Techniques in Seedlings to Promote Greening of Reclaimed Lands. National Research Foundation of Korea (NRF). Mar 2020 – Feb 2023.
8. Evaluation of the Impact of Winter Pasture Management on Springtime Fine Dust Reduction. National Institute of Agricultural Sciences (NAS). Jan 2020 – Dec 2021.

● Kim, S., Hwang, D. Y., Shin, T. Y., Kwak, J. H., 2023. Correlation of fruit tree rhizosphere soils with entomopathogenic fungi. Entomological Research. 53: 333-342. https://doi.org/10.1111/1748-5967.12666 (Corresponding author)
● Park, H. J., Baek, N., Lim, S. S., Jeong, Y. J., Seo, B. S., Kwak, J. H., Lee, S. M., Yun, S. I., Kim, H. Y., Arshad, M. A., Choi, W. J., 2023. Coupling of δ13C and δ15N to understand soil organic matter sources and C and N cycling under different land‑uses and management: a review and data analysis. 59: 487–499 https://doi.org/10.1007/s00374-022-01668-3
● Jeong, Y. J., Park, H. J., Baek, N., Seo, B. S., Lee, K. S., Kwak, J. H., Choi, S. K., Lee, S. M., Yoon, K. S., Lim, S. S., Choi, W. J., 2023. Assessment of sources variability of riverine particulate organic matter with land use and rainfall changes using a three-indicator (δ13C, δ15N, and C/N) Bayesian mixing model. Environmental Research. 216: 114653. https://doi.org/10.1016/j.envres.2022.114653
● Yang, H. I., Baek, N., Kwak, J. H., Lim, S. S., Lee, Y. H., Lee, S. M., Choi, W. J., 2023. Microbial contribution to organic carbon accumulation in volcanic ash soils. 23:866–879 https://doi.org/10.1007/s11368-022-03349-y
● Choi, W. J., Park, H. J., Baek, N., Yang, H. I., Kwak J. H., Lee. S. I., Park, S. W., Shin, E. S., Lim S. S., 2023. Patterns of δ15N in forest soils and tree foliage and rings between climate zones in relation to atmospheric nitrogen deposition: A review. Science of the Total Environment. 900: 165866 https://doi.org/10.1016/j.scitotenv.2023.165866
● Park, H., Kwak, J. H., Lee, J. H., 2023. Reduction of Hexavalent Chromium by Shewanella sp. HN-41 in the Presence of Ferric-Citrate. Korean Journal of Environmental Agriculture. 42(3):253-258 https://doi.org/10.5338/KJEA.2023.42.3.29
● Jeong, Y. J., Park, H. J., Baek, N., Seo, B. S., Lee, K. S., Kwak, J. H., Choi, S. K., Lee, S. M., Yoon, K. S., Lim, S. S., Choi, W. J., 2023. Assessment of sources variability of riverine particulate organic matter with land use and rainfall changes using a three-indicator (δ13C, δ15N, and C/N) Bayesian mixing model. Environmental Research. 216: 114653 https://doi.org/10.1016/j.envres.2022.114653
● Park, H. J., Seo, B. S., Jeong, Y. J., Yang, H. I., Park, S. I., Baek, N., Kwak, J. H., Choi, W. J., 2022. Soil salinity, fertility and carbon content, and rice yield of salt-affected paddy with different cultivation period in southwestern coastal area of South Korea. Soil Science and Plant Nutrition. 68, 53-63, DOI: 10.1080/00380768.2021.1967082 (Co-corresponding author)
● Jeong, Y. J., Seo, B. S., Baek, N, Kwak, J. H., Lee, S. M., Park, H. J., Choi, W. J., 2022. Methods for the Determination of Stable Isotope Ratios of Multiple Nitrogen Species in Rainwater Using Distillation and Evaporation. Frontiers in Environmental Science. 10: 877055 doi: 10.3389/fenvs.2022.877055
● Lee, S. I., Park, H. J., Jeong, Y. J., Seo, B. S., Kwak, J. H., Yang, H. I., Xu, X., Tang, S., Cheng, W., Lim, S. S., Choi, W. J., 2021. Biochar-induced reduction of N2O emission from East Asian soils under aerobic conditions: Review and data analysis. Environmental Pollution. 291: 118154 https://doi.org/10.1016/j.envpol.2021.118154
● Wu, Y., Kwak, J. H., Karst, J., Ni, M., Yan, Y., Lv, X., Xu, J., Chang, S. X., 2021. Long-term nitrogen and sulfur deposition increased root-associated pathogen diversity and changed mutualistic fungal diversity in a boreal forest. Soil Biology and Biochemistry. 155: 108163 https://doi.org/10.1016/j.soilbio.2021.108163
● Park, S. I., Yang, H. I., Park, H. J., Seo, B. S., Jeong, Y, J., Lim, S. S., Kwak, J. H., Kim, H. Y., Yoon, K. S., Lee, S, M., Choi, W. J., 2021. Rice straw cover decreases soil erosion and sediment-bound C, N, and P losses but increases dissolved organic C export from upland maize fields as evidenced by δ13C. Science of the Total Environment. 753: 142053 https://doi.org/10.1016/j.scitotenv.2020.142053
● Choi, W. J., Kwak, J. H., Park, H. J., Yang, H. I., Park, S. I., Xu, Z., Lee, S. M., Lim, S. S., Chang, S. X., 2020. Land use type, and land management and disturbance affect soil δ15N: A review. Journal of Soils and Sediments. 20: 3283–3299 DOI: https://doi.org/10.1007/s11368-020-02708-x
● Park, H. J., Lim, S. S., Yang, H. I., Lee, K. S., Kwak, J. H., Park, S. I., Kim, H. Y., Lee, S. M., Choi, W. J., 2020. Nitrogen effects on quantity, chemistry, and decomposability of Pinus densiflora and Quercus variabilis litters under elevated CO2 and warming. Forest Ecology and Management. 473: 118315. https://doi.org/10.1016/j.foreco.2020.118315
● Park, H. J., Lim, S. S., Kwak, J. H., Lee, K. S., Yang, H. I., Kim, H. Y., Lee, S. M., Choi, W. J., 2020. Biomass, chemical composition, and microbial decomposability of rice root and straw produced under co-elevated CO2 and temperature. Biology and Fertility of Soils. 56:991–1005 https://doi.org/10.1007/s00374-020-01471-y
● Choi, W. J., Chang, S, X., Kwak, J. H., 2020. Comment on: Inorganic N addition replaces N supplied to switchgrass (Panicum virgatum) by arbuscular mycorrhizal fungi. Ecological Applications. https://doi.org/10.1002/eap.2270
● Wang, S., Kwak, J. H., Islam, M.S., Naeth, M.A., Gamal El-Din, M., Chang, S., 2020. Biochar surface complexation and Ni(II), Cu(II), and Cd(II) adsorption in aqueous solutions depend on feedstock type. Science of the Total Environment. 712: 136538 DOI: https://doi.org/10.1016/j.scitotenv.2020.136538
● Li, J., Liu, G., Kwak, J. H., Chang, S. X., Gao, H., Wu, Q., Yang, J., Chen, J., 2020. Reclamation of desert land to continuous cotton cropping affects soil properties and microbial communities in the desert-oasis ecotone of Xinjiang, China. Journal of Soils and Sediments. 20: 862-873 DOI: https://doi.org/10.1007/s11368-019-02469-2
● Wu, Q., Kwak, J. H., Chang, S. X., Han, G., Gong X., 2020. Cattle urine and dung additions differently affect nitrification pathways and greenhouse gas emission in a grassland soil. Biology and Fertility of Soils. 56: 235-247 DOI: https://doi.org/10.1007/s00374-019-01415-1
● Park, H. J., Lim, S. S., Yang, H. I., Lee, K. S., Park, S. I., Kwak, J. H., Kim, H. Y., Oh, S. W., Choi, W. J., 2020. Co-elevation of CO2 and temperature with changed soil water availability do not change litter quantity and quality of pine and oak. Agricultural and Forest Meteorology. 280: 107795 DOI: 10.1016/j.agrformet.2019.107795
● Lim, S. S., Yang, H. I., Park, H. J., Seo, B. S., Lee, K. S., Lee, S. H., Lee, S. M., Kim, H. Y., Ryu, J. H., Kwak, J. H., Choi, W. J. 2019. Land-use management for sustainable rice production and carbon sequestration in reclaimed coastal tideland soils for South Korea: a review. Soil Science and Plant Nutrition. 66: 60-75 DOI: https://doi.org/10.1080/00380768.2019.1674121 (Co-corresponding author)
● Kwak, J. H., Islam, M. S., Wang, S., Messele, S. A., Chang, S. X., Naeth, M. A., Gamal El-Din, M., 2019. Biochar properties and lead(II) adsorption depend on feedstock type, pyrolysis temperature, and steam activation. Chemosphere. 231: 393-404 DOI: 10.1016/j.chemosphere.2019.05.128
● Lee, D. S., Lim, S. S., Park, H. J., Yang, H. I., Park, S. I., Kwak, J. H., Choi, W. J., 2019. Fly ash and zeolite decrease metal uptake but do not improve rice growth in paddy soils contaminated with Cu and Zn. Environment International. 129: 551-564 DOI: 10.1016/j.envint.2019.04.032 (Co-corresponding author)
● Wang, Q., Kwak, J. H., Choi, W. J., Chang, S. X., 2019. Long-term N and S addition and changed litter chemistry do not affect trembling aspen leaf litter decomposition, elemental composition and enzyme activity in a boreal forest. Environmental Pollution. 250: 143-154. DOI: 10.1016/j.envpol.2019.04.007 (Co-first author)
● Kwak, J. H., Lim, S. S., Baah-Acheamfour, M., Choi, W. J., Fatemi, F., Carlyle, C, N., Bork, E. W., Chang, S. X., 2019. Introducing trees to agricultural lands increases greenhouse gas emission during spring thaw in Canadian agroforestry systems. Science of the Total Environment. 652: 800-809. DOI: 10.1016/j.scitotenv.2018.10.241
● Park, H. J., Park, H. J., Yang, H. I., Park, S. I., Lim, S. S., Kwak, J. H., Lee, G. T., Lee, S. M., Park, M., Choi, W. J. 2019. Sorption of Pb in chemical and particle-size fractions of soils with different physico-chemical properties. Journal of Soils and Sediments 19: 310-321. DOI: 10.1007/s11368-018-1978-3



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