Publications

Underlined authors were under Dr. Knappenberger’s direct supervision. * indicates graduate students, # indicates undergraduate students, and † indicates postdocs working under his supervision.

31. Song, Z.*, He, J., Mai, S., Knappenberger, T., & Olshansky, Y. (2025). Chitosan-modified biochar enhanced PFAS degradation in UV/sulfite: impact of environmental conditions and applicability across different PFAS. Environmental Science: Water Research & Technology, 12(1), 157–167.

30. Olshansky, Y., Lawhon, J.*, Ojeda, A., Melina, N., & Knappenberger, T. (2025). Impact of dissolved organic matter chemical properties on perfluorooctane sulfonate solution binding affinities and adsorption on soils. Journal of Environmental Quality, 54(5), 978–990.

29. Hensley, D.A.*, Knappenberger, T., Lancellotti, B.V., Brantley, E., Shaw, J.N., Dobre, M., Lindner, J.R. (2025). Runoff generation in ephemeral streams of the Virgin Islands: The case of Salt River, St. Croix. Journal of Hydrology: Regional Studies. doi:10.1016/j.ejrh.2025.102372

28. Tian, Z., Zhang, M., Chen, J., and Knappenberger, T. (2024). Effects of drying-induced shrinkage on thermal and hydraulic properties of clayey soils. Soil and Tillage Research. doi:10.1016/j.still.2024.106415

27. DeGuzman, K.*, Knappenberger, T., Olshansky, Y., Brantley, E., Jayakaran, A.D. (2024). Effects of Bioretention Soil Mixtures on Metal Speciation and Toxicity to Aquatic Communities. Journal of Sustainable Water in the Built Environment. doi:10.1061/JSWBAY.SWENG-612

26. DeGuzman, K.*, Knappenberger, T., Brantley, E., & Olshansky, Y. (2023). Estimating runoff probability from precipitation data: A binomial regression analysis. Hydrological Processes, 37(11). doi:10.1002/hyp.15029

25. Hamid, A.K., Wilson, A.E., Gladfelter, M.F., Knappenberger, T., & Wang, D. (2023). Long-term missing role of small colloids and nanoparticles on the loading and speciation of phosphorus in catfish aquaculture ponds in west Alabama. Chemosphere, 340. doi:10.1016/j.chemosphere.2023.139906

24. Patrignani, A., Wyatt, B., Knappenberger, T., & Edinger Marshall, S. (2022). Review of Rain or Shine: An Introduction to Soil Physical Properties and Processes, by Tyson Ochsner. Vadose Zone Journal, 21(3). doi:10.17605/OSF.IO/Z4RBT

23. Knappenberger, T., Jayakaran, A.D., & Stark, J.D. (2022). A Bayesian modeling framework to predict stormwater pollutant reduction in bioretention media. Ecological Engineering, 178. doi:10.1016/j.ecoleng.2022.106582

22. Sweeney, L.C.*, Knappenberger, T., Brantley, E.F., & Shaw, J.N. (2022). Zeolite amended bioretention media improves nitrogen removal from stormwater. Agricultural & Environmental Letters, 7(1). doi:10.1002/ael2.20060

21. LeFevre, O.V.#, Knappenberger, T., Shaw, J.N., Olshansky, Y. (2021). Camera illustration of Indicator of Reduction in Soils (IRIS) reduction dynamics. Agricultural & Environmental Letters, 6(3). doi:10.1002/ael2.20051

20. Filho, J., Ortiz, B.V., Damianidis, D., Balkcom, K.S., Dougherty, M., Knappenberger, T. (2020). Irrigation Scheduling to Promote Corn Productivity in Central Alabama. Journal of Agricultural Science, 12(9). doi:10.5539/jas.v12n9p34

19. Filho, J., Ortiz, B.V., Balkcom, K.S., Damianidis, D., Knappenberger, T., Dougherty, M. (2020). Evaluation of Two Irrigation Scheduling Methods and Nitrogen Rates on Corn Production in Alabama. International Journal of Agronomy, 2020. doi:10.1155/2020/8869383

18. Liggett, C.*, Knappenberger, T., Shaw, J.N., Brantley, E., Gamble, A.V. (2019). Comparison of constructed wetlands to a preservation wetland in the Nashville Basin, Tennessee (USA). Wetlands, 1–12. doi:10.1007/s13157-019-01242-y

17. Poncet, A.†, Knappenberger, T., Brodbeck, C., Fogle, M., Shaw, J.N., and Ortiz, B.V. (2019). Multispectral UAS data accuracy for different radiometric calibration methods. Remote Sensing, 11(16), 1917. doi:10.3390/rs11161917

16. Poncet, A.M.†, Fulton, J.P., McDonald, T.P., Bridges, T.P., Knappenberger, T. (2019). Corn Emergence and Yield Response to Row-Unit Depth and Downforce for Varying Field Conditions. Applied Engineering in Agriculture, 35(3), 399–408. doi:10.13031/aea.12408

15. Jayakaran, A.D., Knappenberger, T., Stark, J.D., Hinman, C. (2019). Remediation of Stormwater Pollutants by Porous Asphalt Pavement. Water, 11(3), 520. doi:10.3390/w11030520

14. Gauci, A., Brodbeck, C., Poncet, A.M.†, Knappenberger, T. (2018). Assessing the Geospatial Accuracy of Aerial Imagery Collected with Various UAS Platforms. Applied Engineering in Agriculture, 61(6), 1823–1829.

13. Poncet, A.M.†, Fulton, J.P., McDonald, T.P., Knappenberger, T., Shaw, J.N., Bridges, T.P. (2018). Effect of Heterogeneous Field Conditions on Corn Seeding Depth Accuracy and Uniformity. Applied Engineering in Agriculture, 34(5), 819–830. doi:10.13031/aea.12238

12. Damianidis, D., Ortiz, B., Windham, G., Bowen, K., Hoogenboom, G., Scully, B., Hagan, A., Knappenberger, T., Woli, P., Williams, P. (2018). Evaluating a Generic Drought Index as a Predictive Tool for Aflatoxin Contamination of Corn: From Plot to Regional Level. Crop Protection, 113, 64–74. doi:10.1016/j.cropro.2018.07.013

11. Damianidis, D., Ortiz, B., Bowen, K., Windham, G., Hoogenboom, G., Hagan, A., Knappenberger, T., Abbas, H., Scully, B., Mourtzinis, S. (2018). Minimum Temperature, Rainfall, and Agronomic Management Impacts on Corn Grain Aflatoxin Contamination. Agronomy Journal, 110(5), 1697–1708. doi:10.2134/agronj2017.11.0628

10. Knappenberger, T., Jayakaran, A.D., Stark, J.D., Hinman, C.H. (2017). Monitoring Stormwater Infiltration and Outflow of Permeable Pavement Parking Lot Cells. Journal of Irrigation and Drainage Engineering, 143(8). doi:10.1061/(ASCE)IR.1943-4774.0001197

9. Radcliffe, D.E., Knappenberger, T., and Daigh, A.L.M. (2016). Using Khan Academy Videos in Flipped Classroom Mode to Bolster Calculus Skills in Soil Physics Courses. Natural Sciences Education, 45. doi:10.4195/nse2016.04.0008

8. Knappenberger, T., Aramrak, S., and Flury, M. (2015). Transport of Barrel and Spherical Shaped Colloids in Unsaturated Porous Media. Journal of Contaminant Hydrology, 180, 69–79. doi:10.1016/j.jconhyd.2015.07.007

7. Knappenberger, T., Flury, M., Mattson, E.D., and Harsh, J.B. (2014). Does Water Content or Flow Rate Control Colloid Transport in Unsaturated Porous Media? Environmental Science and Technology, 48(7), 3791–3799. doi:10.1021/es404705d

6. Singh, P., Abdou, H., Flury, M., Schillinger, W., and Knappenberger, T. (2013). Critical water potentials for germination of wheat cultivars in the dryland northwest USA. Seed Science Research, 23, 189–198. doi:10.1017/S0960258513000172

5. Knappenberger, T., and Köller, K. (2012). Spatial assessment of the influence of seeding depth and apparent soil electrical conductivity on emergence and yield of corn. Precision Agriculture, 13, 163–180. doi:10.1007/s11119-011-9235-4

4. Knappenberger, T., Ströbel, M., Köller, K. (2007). Hohenheim software for plotting field experiments. Agricultural Engineering, 62(3), 152–153. doi:10.15150/lt.2007.964

3. Knappenberger, T. (2006). Work quality of seedbed preparation depending on the soil moisture. Agricultural Engineering, 61, 306–308. doi:10.15150/lt.2006.2047

2. Jantschke, C., Knappenberger, T., Köller, K. (2005). Soil moisture measurement, an additional input for precision farming. Agricultural Engineering, 60(3), 134–135. doi:10.15150/lt.2005.1187

1. Knappenberger, T., and Köller, K. (2005). Opportunities and challenges of a real-time control of seeding depth. Agricultural Engineering Research, 11, 49–52. (in German)

Knappenberger, T. 2015: Teaching: The Other Part of a Faculty Position. Crops, Soils, Agronomy News 60(9), 42–43.

Knappenberger, T. 2009: The influence of seeding depth on emergence and yield of corn. PhD-thesis, University of Hohenheim, Germany. (in German)

Knappenberger, T., Ströbel, M., and Köller, K. 2007: Software for experimental design. Landtechnik 62, 152–153. (in German)

Knappenberger, T. 2006: The quality of seedbed preparation depending on the soil water content. Landtechnik 61, 306–307. (in German)

Jantschke, C., Knappenberger, T., and Köller, K. 2005: The soil moisture measuring value. Landtechnik 60, 134–135. (in German)

Knappenberger, T. 2003: Design of a development system for autonomous control of a farm tractor using CASE tools. Master-Thesis, University of Hohenheim, Germany. (in German)

Papers presented at conferences for which a full paper was published in the conference proceedings or preprints.

7. Hyjack, A., Clemons, C. A., Knappenberger, T., McKibben, J. D., Lindner, J. D. Increasing literacy of agricultural sustainability through implementation of soar program. Proceedings of the 2022 North American Colleges and Teachers of Agriculture National Conference, 2022

6. Knappenberger, T., E. van Santen. (2017). Big Data in Agronomic Experiments: On-Farm Experiments. In Proceedings of the 29th Conference on Applied Statistics in Agriculture. Kansas State University, Manhatten, Kansas (oral presentation)

5. Fulton, J.P., A. Poncet, T.P. McDonald, T. Knappenberger, J.N. Shaw, K. Balkcom and R. Bridges. (2015). Considerations for Site-specific Implementation of Active Downforce and Seeding Depth Technologies on Row-crop Planters. In Proceedings of the 73rd Conference LAND.TECHNIK – AgEng 2015, Hannover, Germany. November 6-7. 2251(2015): 139-145. (oral presentation)

4. Knappenberger, T., and K. Köller. (2007). The dynamic variation of seeding depth of corn based on the soil water content. In: Poster Paper Proceedings of the 6th European Conference on Precision Agriculture, Skiathos, Greece. (poster presentation)

3. Knappenberger, T., and K. Köller. (2006). The dynamic variation of seeding depth of corn. In: Proceedings of the 8th International Conference on Precision Agriculture, Minneapolis, USA. (oral presentation)

2. Knappenberger, T., and K. Köller. (2005). The dynamic variation of seeding depth of corn. In: Agricultural Engineering, High tech for a sustainable agriculture, VDI-Meeting, Hannover, Germany, 435–440. (oral presentation)

1. Knappenberger, T., C. Jantschke, and K. Köller. (2005). Dynamic measurement of soil moisture and it’s application in seeding. In: Workshop Precision Farming, Sensing and Robotics in Precision Farming, Renningen, Germany, 18–21. (oral presentation)

Papers or posters presented at conferences for which abstracts were published.

96. Herrin, S.*, T. Knappenberger, and Y. Olshansky. (2025). Characterizing the Alabama Blackland Prairie problematic hydric soils. CANVAS 2025, Salt Lake City, UT. (poster presentation)

95. Rich, W.# , Knappenberger. T. (2025). Urban Sprawl in Coastal Alabama and Its Effects on Agricultural and Natural Ecosystems. Southern Branch ASA Meeting, Irving, TX. (poster presentation)

94. Knappenberger. T. (2025). Bioretention for Heavy Metals: Evaluating Removal Efficiency, Speciation, and Toxicity. American Ecological Engineering Society Annual Meeting, Athens, GA. (oral presentation)

93. Mack, S.*, Gamble, A., Knappenberger. T., Balkcom, K. (2025). Soil Moisture Conservation in Peanut (Arachis hypogea L.) Production Systems. American Peanut Research & Education Society Annual Meeting, Richmond, VA. (poster presentation)

92. Knappenberger. T.. Hensley, D.*(2025). Linking Small-Island Soil Hydrology and Watershed Processes in the Salt River Ephemeral Stream Network. Kirkham Conference, Fukushima, Japan. (poster presentation)

91. Knappenberger. T., Batchelor, W, Ellenburg, Lee (2025). Advancing Irrigation and Watershed Planning in Alabama: Updates from Ongoing Projects. Alabama Water Resources Conference, Orange Beach, AL. (oral presentation)

90. Rabinowitz, A., Duke, J., Batchelor, W. Knappenberger. T. (2025). The Relative Profitability of Adopting Irrigation on Alabama Corn Farms: Preliminary Results from an Economic Simulation. Alabama Water Resources Conference, Orange Beach, AL. (oral presentation)

89. Sklencar, S.*, Olshansky, Y., Knappenberger. T. (2025). Dissolved Organic Matter Affects PFAS Fate in the Soil-Water Continuum. Alabama Water Resources Conference, Orange Beach, AL. (poster presentation)

88. Song, Z.*, Olshansky, Y., Knappenberger. T. (2025). PFAS Transport in Soil Columns: Impact of Dissolved Organic Matter. Alabama Water Resources Conference, Orange Beach, AL. (oral presentation)

87. Beasley, J.*, S. Virk, A. V. Gamble, T. Knappenberger, and E. Francisco. (2025). Evaluation of different soil and crop spatial properties for predicting in-field nutrient variability and delineation of management zones for precision soil sampling. CANVAS 2025, Salt Lake City, UT. (poster presentation)

86. Hinely, M.# , T. Knappenberger, and C. Anderson. (2025). IRIS film performance in coastal blackwater wetlands. CANVAS 2025, Salt Lake City, UT. (poster presentation)

85. Beasley, J.*, S. Virk, A. V. Gamble, T. Knappenberger, and E. Francisco. (2025). Validation of management zones for estimating nutrient variability in agricultural fields in the southeastern U.S. CANVAS 2025, Salt Lake City, UT. (poster presentation)

84. Cooper, L.*, T. Knappenberger, and Y. Olshansky. (2025). Evaluation of IRIS films in problematic smectitic soils. CANVAS 2025, Salt Lake City, UT. (poster presentation)

83. Song, Z.*, Y. Olshansky, and T. Knappenberger. (2025). Assessing the risk of PFAS leaching: Role of dissolved organic matter in soil transport. CANVAS 2025, Salt Lake City, UT. (poster presentation)

82. Knappenberger. T., Batchelor, W., Rabinowitz, A. (2024). Realistic Irrigation Yield Effects: Insights From Variety Trials and Crop Modeling in Alabama. Alabama Water Resources Conference, Orange Beach, AL. (oral presentation)

81. Hensley, D.A.*, Knappenberger. T. (2024). Identifying Water Quality Problem Source Areas in Small Coastal Watersheds: The Challenge of Attribution. Alabama Water Resources Conference, Orange Beach, AL. (oral presentation)

80. Cartee, K.# , Knappenberger. T. (2024). Evaluating IRIS Films in Alabama Blackland Prairie Soils for Wetland Restoration. Alabama Water Resources Conference, Orange Beach, AL. (poster presentation)

79. Rich, W.# , Knappenberger. T. (2024). Analyzing Land Use Change in Coastal Alabama: A Two-Decade Perspective. Alabama Water Resources Conference, Orange Beach, AL. (poster presentation)

78. Travis, B.# , Hughes, M.A.# „ Anderson, C., Knappenberger. T. (2024). Investigating the Impacts of Land Use on Soil Biogeochemistry in Headwater Wetlands in Baldwin County, Alabama. Alabama Water Resources Conference, Orange Beach, AL. (poster presentation)

77. Hensley, D.A.*, Knappenberger. T. (2024). Simulated water balance of mulch covers under plantain production: Interception, runoff, and deep drainage. Oral presentation. Caribbean Food Crops Society, 14-20 July 2024, Punta Cana, Dominican Republic.

76. Knappenberger. T. (2024). Growing Greener: Innovations in Climate-Resilient Farming Practices. The 4th International Conference on Environmental Pollution, Restoration, and Management. Quy Nhon, Vietnam (oral presentation)

75. Knappenberger. T. (2024). Coastal Development and Its Effects on Ecosystems Graham Creek. Wolfs Bay Watershed Annual Meeting. Graham Creek Nature Preserve, Foley, AL. (oral presentation)

74. Diaz, I.*, Knappenberger. T., Shaw, J., Rabinowitz, A. (2024). Predicting Irrigation Yield Effects Using Machine Learning in the Alabama. Southern Branch ASA Meeting, Atlanta, GA. (oral presentation)

73. Knappenberger. T., Sanz-Saez, A., & Gamble, A.V. (2024). A Bayesian Approach to Assess Cover Crop Effects on Soil Physical Properties. Southern Branch ASA Meeting, Atlanta, GA. (oral presentation)

72. Knappenberger, T. (2023) Deciphering Irrigation Effects on Crop Yield Using Big Data, Auburn Climate Summit, Auburn University (oral presentation)

71. Hensley, D.A.*, Knappenberger, T., Lancellotti, B.V. (2022). Studying Soil Erosion and Sedimentation in Small Island Watersheds: Adaptive Techniques for a Changing Climate System. Soil Erosion Research under a Changing Climate Symposium. Punta Borinquén Resort, Aguadilla, Puerto Rico, USA (oral presentation)

70. Diaz, I.*, Knappenberger. T., Shaw, J., Rabinowitz, A. (2023). Revealing Spatial and Temporal Effects of Crop Irrigation to Foster Climate Smart Agriculture. Auburn Graduate Students Poster Show Case. Auburn University. (poster presentation)

69. Diaz, I.*, Knappenberger. T., Shaw, J., Rabinowitz, A. (2023). A Decade of Irrigation ‐ Crop Yield Response to Watering Alabama Black Belt Soils. Alabama Water Resources Conference, Orange Beach, AL. (oral presentation)

68. Diaz, I.*, Knappenberger. T., Shaw, J., Rabinowitz, A. (2023). Predicting Irrigation Effects of Corn (Zea mays) and Soybeans (Glycine max L.) Yield Based on Terrain Attributes, Drought Indices, and Soil Properties. Annual Meeting of the Soil Science Society of America. St. Louis, MS. (oral & poster presentation)

67. Hensley, D.A.*, Lancellotti, B.V., Knappenberger, T.. (2023). Understanding Ephemeral Streams in the Virgin Islands. AGU Annual Meeting. San Francisco, CA. (poster presentation)

66. Hensley, D.A.*, Morgan, M., John‐Baptiste, S.D., Lancellotti, B.V., & Knappenberger, T.. (2023). Spatial soil moisture dynamics in a breadfruit orchard in St. Croix, Virgin Islands. Poster presentation at the Caribbean Food Crops Society annual meeting, Grenada. (poster presentation)

65. Kharel, G.*, Knappenberger, T.,Shaw, J.N., Gamble, A.V. &Olshansky, Y.(2022). Land Use Effects on Hydraulic Conductivity Dynamics in Shrink-Swell Soils. 2022 Annual Meeting of the Southern Branch of the American Society, New Orleans (oral presentation)

64. Knappenberger, T., (2022). Using R/exams in Learning Management Systems to Foster Student Learning. Annual Meeting Soil Science Society of America, Baltimore (oral presentation)

63. Clemons, C. A., Knappenberger, T., Lindner, J. R., & McKibben, J. L. (2022). Finding Disciplinary Literacy Capacities Between Cultures: An Inquiry in United States Secondary School Agriscience Education Classrooms Between English Language Learners and Native English Speakers. Poster presentation at the International Conference for the Association for International Agricultural and Extension Education. Thessaloniki, Greece(poster presentation)

62. Knappenberger, T., LeFevre, O.# , Shaw, J.N., Olshansky, Y. (2022). Evaluation of Mn and Fe Oxide Reduction Dynamics using a Rhizosphere Camera and Image Analysis, World Conference of Soil Science, Glasgow, UK (oral presentation)

61. Shaw, J.N., Knappenberger, T., Savage, C.*, Guertal, E. & Brantley, E. (2022). Pedogenesis and Inorganic Carbon Sequestration in Southeastern U.S. Blackland Prairie Vertisols, World Conference of Soil Science, Glasgow, UK(poster presentation)

60. Agade, P., Bean, E., Dean, R., Vasconscelos, J., Knappenberger, T., Blersch, D., Brantley, E. (2022). GatorByte: A Water-Quality Mapping Buoy for Locating Watershed Pollution Sources. IEEE Sensors Conference in Dallas, TX (oral presentation)

59. Knappenberger, T.. (2022). Use of Indicator of Reduction in Soils (IRIS) in Wetlands. Alabama Water Resources Conference, Orange Beach (oral presentation)

58. Griffith, S.# , Knappenberger, T., Brantley, E. (2022). Improved Stormwater Management through Zeolite Amended Bioretention Media. Alabama Water Resources Conference, Orange Beach (poster presentation)

57. Hensley, D.A.*, Knappenberger, T., Lancellotti, B. (2022). Soil moisture regimes under mulch covers in tropical plantain production (Musa acuminata x M. balbisiana, AAB). Auburn Student Research Symposium(oral presentation)

56. Kharel, G.*, Knappenberger, T., Shaw, J.N., Gamble, A, Olshansky, Y. (2022). Hydraulic conductivity dynamics of expansive clayey soil under different land uses. Auburn Student Research Symposium (oral presentation)

55. Hensley, D.A.*, Knappenberger, T., Lancellotti, B. (2022). Soil moisture regimes under mulch covers in tropical plantain production. Annual Meeting Soil Science Society of America, Baltimore (oral presentation)

54. Kharel, G.*, Knappenberger, T., Shaw, J., Gamble, A., & Olshansky, Y. (2021). Land Use Effects on Shrink-Swell Behavior of Expansive Clayey Soils. 2021 Annual Graduate Student Symposium, College of Agriculture, Auburn University. (oral presentation)

53. Poncet, A.†, Knappenberger, T.. (2021). Decision Matrix to Inform Model Selection for the Analysis of One-Dimensional Spatial Data. Conference on Applied Statistics in Agriculture and Natural Resources 2021. University of Florida, Gainsville. (oral presentation)

52. Knappenberger, T., Brantley, E. LeBleu, C. (2021). Stormwater Best Management Practices to improve the Parkerson Mill Creek watershed in Lee County Alabama. Alabama Water Resources Conference 2021. Orange Beach, AL. (oral presentation)

51. Knappenberger, T., LeFevre, O.# , Shaw, J., Olshansky, Y. (2021). In Situ Observation of Mn and Fe Oxide Reduction Dynamics Using a Rhizosphere Camera. SSSA annual meeting Salt Lake City. (oral presentation)

50. Wichmann, M.# , Knappenberger, T., Brantley, E.. (2020). Identifying Critical Factors Contributing to Soil Shear Strength at Stream Restoration Sites. American Ecological Engineering Society Annual Meeting. (oral presentation)

49. Sweeney, C.*, E. Brantley, T. Knappenberger, J.N. Shaw (2020). Effect of zeolite addition on bioretention media infiltration and pollutant removal. American Ecological Engineering Society Annual Meeting. (oral presentation)

48. Knappenberger, T., A. Jayakaran, J. Stark (2020). Wichmann, M., T. Knappenberger, E. Brantley. (2020). Identifying Critical Factors Contributing to Soil Shear Strength at Stream Restoration Sites. Annual Soil Science Society of America Meeting. (oral presentation)

47. Kharel, G., T. Knappenberger, J.N. Shaw, A. Gamble, Y. Olshansky. (2020) Land Management Influences Shrink-Swell Behavior of Expansive Clayey Soils. Annual Soil Science Society of America Meeting. (oral presentation)

46. Wichmann, M.# , T. Knappenberger, E. Brantley. (2019). Effects of Vegetation and Time on Soil Stability at Stream Restoration Sites. Alabama Water Resources Conference, Orange Beach, AL. (poster presentation)

45. Sweenee, C.*, E. Brantley, T. Knappenberger, J.N. Shaw. (2019). Comparison of Pollutant Removal Capabilities of three Representative Bioretention Mixes of the United States. Alabama Water Resources Conference, Orange Beach, AL. (poster presentation)

44. Knappenberger, T., A. Jayakaran, and J.D. Stark. (2019). Bayesian Approach to Assess Stormwater Pollutant Reduction in Bioretention Cells. The 19th Annual Meeting of the American Ecological Engineering Society. Asheville, NC. June 3-9, 2019. (oral presentation)

43. Jayakaran, A., T. Knappenberger, and J.D. Stark. (2019). The Role of Porous Asphalt in Stormwater Mitigation in Urban Landscapes. The 19th Annual Meeting of the American Ecological Engineering Society. Asheville, NC. June 3-9, 2019. (oral presentation)

42. Knappenberger, T., J.N. Shaw, B. Ortiz and E. Brantley. (2019). Evaluation of Agronomic Management on Soil and Environmental Quality of Red Ferralitic Landscapes in Mayabeque Province. Third International Seminar on Animal and Plant Health, Varadero, Cuba, May 6-10, 2019. (oral presentation)

41. Ortiz, B.V., E. Guertal, J. Giambrone, A. Appel, K. Lawrence, P. Donald, D. Held, W. Pacheco, J.N Shaw, T. Knapenberger, and H. Fadamiro. (2019). Strengthening food security in Cuba through multidisciplinary collaboration with Auburn University in Alabama, USA. Third International Seminar on Animal and Plant Health, Varadero, Cuba, May 6-10, 2019. (oral presentation)

40. Poncet, A.M.†, T. Knappenberger, C. Brodbeck, J. Shaw, M. Fogle. (2019). Evaluating Radiometric Calibration Methods for Accuracy of Multispectral UAS Data.. ASA, CSSA, and SSSA Annual Meetings, San DIego, California, USA. (oral presentation)

39. Richard, S., Y. Feng, T. Knappenberger, P. Srivastava. (2019). Plant-Available Polycyclic Aromatic Hydrocarbons in Biochars. ASA, CSSA, and SSSA Annual Meetings, San Diego, California, USA. (poster presentation)

38. Knappenberger, T., J.N. Shaw, and E.F. Brantley. (2018). Using Bayesian Spatial Statistics to Better Estimate Irrigation Water Productivity. Alabama Water Resources Conference, September 6-8. Orange Beach, Alabama. (oral presentation)

37. J.N. Shaw, T. Knappenberger, and E. Brantley. (2018). Land use effects on water-related dynamic soil properties of Southeastern Coastal Plain Kandiudults. Alabama Water Resources Conference, September 6-8. Orange Beach, Alabama. (oral presentation)

36. Knappenberger, T., A.Poncet, J.N.Shaw, and E.F. Brantley. (2018). Assessing remote sensing data with spatial statistics in precision agriculture field experiments. International Union of Soil Science (IUSS) 21st World Congress of Soil Science, August 12-17th, 2018, Rio De Janeiro, Brazil. (oral presentation)

35. Shaw, J.N., B. F. Hajek, T. Knappenberger, and E.F. Brantley. (2018). Highly Weathered Soil Development in the Southeastern U.S. International Union of Soil Science (IUSS) 21st World Congress of Soil Science, August 12-17th, 2018, Rio De Janeiro, Brazil. (poster presentation)

34. Kuntz, R.# , T. Knappenberger, E. Brantley. (2017). The Lethal Effects of Stormwater Toxicity on Daphnia Pulex Populations. College of Agriculture 2017 Research Poster Showcase, Auburn University (poster presentation)

33. Carter, L.*, T. Knappenberger, D. Monks, S. Shaw. (2017). Improving Irrigation Management Through Soybean Root Growth. College of Agriculture 2017 Research Poster Showcase, Auburn University (poster presentation)

32. Wang, P.*, T. Knappenberger, S. Shaw, Y. Fung. (2017). The Effects of Soul Surface Temperature and Relative Humidity on 2,4-D Volatilization. College of Agriculture 2017 Research Poster Showcase, Auburn University (poster presentation)

31. Douglas, H.*, T. Knappenberger, E. Brantley, J. Howe. (2017). Effects of Suspended Solids Phosphorus Transport in Bioretention Cells. College of Agriculture 2017 Research Poster Showcase, Auburn University (poster presentation)

30. Douglas, H.*, T. Knappenberger, E. Brantley, J. Howe. (2017). Effects of Suspended Solids Phosphorus Transport in Bioretention Cells. ASA, CSSA, and SSSA Annual Meetings, Tampa, Florida, USA. (oral presentation)

29. van Cleave, A., J. Howe, G. Harris, A. Poncet, T. Knappenberger. (2017). Boron Supplementation in Runner Peanuts. ASA, CSSA, and SSSA Annual Meetings, Tampa, Florida, USA. (oral presentation)

28. Liggett, C.*, T. Knappenberger, S. Shaw, E. Brantley. (2017).Assessing Alternative Uses of IRIS Tubes in Constructed Wetlands. ASA, CSSA, and SSSA Annual Meetings, Tampa, Florida, USA. (oral presentation)

27. Carter, L.*, T. Knappenberger, D. Monks, S. Shaw, J Howe. (2017). Improving Irrigation Management by Understanding Rhizosphere Processes. ASA, CSSA, and SSSA Annual Meetings, Tampa, Florida, USA. (oral & poster presentation)

26. Jayakaran, A. D., J. McIntyre, T. Knappenberger, J. D. Stark. (2017). The Role of Compost in Green Stormwater Infrastructure. 2017 Oklahoma Compost Conference, Norman, OK 2017 (oral presentation)

25. Yang, W., J. He, T. Knappenberger, M. Beidaghi, D. Nadolnyak, Z. Cheng, B. Chin, P. Chen. (2017). Field-Deployable Wireless Sensor Networks for Mapping Inorganic N-Containing Species in Soil. The Electrochemical Society Annual Meeting, National Harbor, MD. (poster presentation)

24. Zhu Y., W. Yang, Y. Cai, T. Knappenberger, M. Beidaghi, Z. Cheng, B. Chin, P. Chen. (2017). Dendrimer-Encapsulated Ultra-Small Porous MnO2 -Fe3 O4 Nanosphere for Clean Water. The Electrochemical Society Annual Meeting, National Harbor, MD. (poster presentation)

23. Knappenberger, T., E. Brantley. (2017). Using Drone Images to Capture Channel Geometry for Hydrological Modeling. Alabama Water Resources Conference, Orange Beach, AL. (oral presentation)

22. Kuntz, R.# , T. Knappenberger, E. Brantley, A. Wilson, J. Stoeckel. (2017). The Lethal Effects of Stormwater Toxicity on Daphnia Pulex. Alabama Water Resources Conference, Orange Beach, AL. (poster presentation)

21. T. Knappenberger. (2017). Analyzing Non-Replicated Field Experiments With Spatial Statistics. This is Research – Auburn University Faculty Symposium. (poster presentation)

20. Jayakaran, A. D., T. Knappenberger, J. D. Stark. (2017). Permeable Pavement Performance in Western Washington. Northwest Environmental Business Council Meeting, Tacoma, Washington. (oral presentation)

19. Douglas, H.*, T. Knappenberger, and E. Brantley. (2017). Temporal and Spatial Relationships of Suspended Sediments in Bioretention Cells. International Erosion Control Association Annual Meeting. Atlanta, Georgia. (poster presentation)

18. Duke, C., T. Knappenberger, and E. Brantley. (2017). Using Photogrammetry for Verification of Stream Restoration. Southern Branch ASA Meeting. Mobile, Alabama. (poster presentation)

17. Douglas, H.*, T. Knappenberger, and E. Brantley. (2016). Temporal and Spatial Relationships of Suspended Sediments in Bioretention Cells. Alabama Stormwater Symposium. Auburn, Alabama. (poster presentation)

16. Duke, C., T. Knappenberger, and E. Brantley. (2016). Using Photogrammetry for Verification of Stream Restoration. Alabama Stormwater Symposium. Auburn, Alabama. (poster presentation)

15. Duke, C., T. Knappenberger, and E. Brantley. (2016). Using Photogrammetry for Verification of Stream Restoration. EcoStream 2016 – Stream Ecology and Restoration Conference. Asheville, North Carolina. (poster presentation)

14. Wang, P.*, T. Knappenberger, J.N. Shaw. (2016). The Influence of Soil Surface Temperature and Relative Humidity on 2, 4-D Volatilization. ASA, CSSA, and SSSA Annual Meetings, Phoenix, Arizona, USA. (oral & poster presentation)

13. T. Knappenberger. (2016). Using a Lightboard to Flip The Classroom. ASA, CSSA, and SSSA Annual Meetings, Phoenix, Arizona, USA. (oral presentation)

12. T. Knappenberger, J. D. Stark. (2016). Hydraulic Performance of Maintained and Unmaintained Permeable Pavements. Alabama Stormwater Symposium. Auburn, Alabama. (oral presentation)

11. T. Knappenberger, J. D. Stark. (2016).Hydraulic Performance of Maintained and Unmaintained Permeable Pavements. Alabama Water Resources Conference. (oral presentation)

10. Jayakaran, A. D., T. Knappenberger, J. D. Stark. (2016). Rain Garden Mesocosm and Permeable Pavement Performance in Western Washington. AEES annual meeting, Knoxville, Tennessee, USA. (oral presentation)

9. Jayakaran, A. D., J. K. McIntyre, T. Knappenberger, J. D. Stark and A. Copado. (2016). Research and Outreach at the Washington Stormwater Center. Invited Keynote Speaker – 2016 EPA Region 6 Stormwater Workshop. Oklahoma City, OK. (oral presentation)

8. Knappenberger, T., J.B. Stark. (2015). Stormwater Nutrient Reduction in Bioretention Cells. ASA, CSSA, and SSSA Annual Meetings, Minneapolis, Minnesota, USA. (oral presentation)

7. Czigany, S., P. Hegedius,T. Knappenberger, M. Flury. (2014). Hydraulic Properties of Bioretention Mixes. ASA, CSSA, and SSSA Annual Meetings, Long Beach, California, USA. (poster presentation)

6. Knappenberger, T. (2014). Filtration of Stormwater Contaminants in Bioretention Cells. SSSA Onsite Wastewater Conference, Albuquerque, New Mexico, USA. (oral presentation)

5. Knappenberger, T., M. Flury, E.D. Mattson, J.B. Harsh. (2013). Impact of water content and pore water velocity on transport of colloids in unsaturated porous media. ASA, CSSA, and SSSA Annual Meetings, Tampa, Florida, USA. (oral presentation)

4. Knappenberger, T., M. Flury, E.D. Mattson, J.B. Harsh, F. Zang, G. Gee, and P. Lichtner. (2012). Identifying the role of flow rate and water content in colloid transport in unsaturated porous media. In: Geophysical Research Abstracts Vol. 14, EGU2012-524. (oral presentation)

3. Knappenberger, T., M. Flury, E.D. Mattson, J.B. Harsh, F. Zang, G. Gee, and P. Lichtner. (2011). Using a Geocentrifuge to Study Colloid Transport in Unsaturated Porous Media. ASA, CSSA, and SSSA Annual Meetings, San Antonio, Texas, USA. (poster presentation)

2. Knappenberger, T., K. Köller.( 2008). Simulation of germination and emergence of corn to gain information for site-specific drilling. In: Proceedings of the 7th International Symposium Prospects for the 3rd Millenium Agriculture, Cluj, Romania, 147–152. (oral presentation)

1. Knappenberger, T., K. Köller. (2005). Sitespecific variation of seeding depth of corn. In: Poster Paper Proceedings of the 5th European Conference on Precision Agriculture, Uppsala, Sweden. (poster presentation)

10. Knappenberger, T.. (2024). Indicator of Reduction in Soils Devices to Confirm Hydric Soil Status in Wetlands. Huazhong Agriculture University, Wuhan, China.

9. Knappenberger, T.. (2024). Preserving Aquatic Ecosystems Through Smart Irrigation Planning in a Context of Water Shortage. International Advanced School in Agricultural Meteorology, World Meteorological Organization, Conegliano, Italy.

8. Knappenberger, T.. (2024). IRIS – Indicator For Reduction in Soils. Professional Soil Classifiers Association of Alabama Annual Meeting, Headland, USA.

7. Invited Panelist Special Session “International Career Strategies and Resources” at the SSSA annual national meeting in Baltimore, Maryland (2022).

6. Knappenberger, T.. (2017). Instruments to measure soil hydrology. Professional Soil Classifiers Association of Alabama Annual Meeting, E.W. Shell Fisheries Center in Auburn, USA.

5. Knappenberger, T.. (2014). LID research in Western Washington State. Department of Biosystem Engineering, Auburn University, Auburn, USA.

4. Knappenberger, T.. (2013). What is R? Introduction of the statistical software package R. Department of Biosystem Engineering, Washington State University, Pullman, USA.

3. Knappenberger, T., M. Flury, E.D. Mattson, J.B. Harsh. (2012). Identifying the role of flow rate and water content in colloid transport in unsaturated porous media. Karlsruhe Institute of Technology, Karlsruhe, Germany.

2. Knappenberger, T., M. Flury, E.D. Mattson, J.B. Harsh. (2012). Identifying the role of flow rate and water content in colloid transport in unsaturated porous media. University of Hohenheim, Stuttgart, Germany.

1. Knappenberger, T. (2009). Precision Farming – Technical requirements and potentials for cost reduction. German Agricultural Center, Potasch, Ukraine.