Brief Summary of Minutes of Annual Meeting

Accomplishments (multi-state activities align with the goals and objectives of S1074)

• In Arkansas, Dr. Zhu and his team have focused their research and extension effort on Objective 3, particularly amending anaerobic co-digestion of poultry litter with wheat straw using biochar. Anaerobic co-digestion (Co-AD) of poultry litter (PL) and agricultural straw using biochar has rarely been practiced. Therefore, we conducted two sequential experiments to evaluate the effect of adding alkaline biochar on improving the batch Co-AD of PL and wheat straw. The feasibility experiment identified the advantages of adding biochar by the improved observed cumulative methane yield (CMY_o, mL CH₄/g VS_substrate) of 9.7%; the increased removal rates of the substrate total solids (TS_substrate) and volatile solids (VS_substrate) of 15.2% and 14.2%, respectively; the enhanced abundance of both hydrolytic bacteria and methanogens, including hydrogegenotrophic Methanobacterium and, especially, the acetolactic Methanosaeta; and the 37.3% higher abundance of the methanogenic pathways, compared to the control. The interaction experiment showed that biochar dosage interacted with the initial substrate carbon-to-nitrogen ratio (C/N) and total solids level (TS). The developed mathematical models for CMY_o and VS_substrate removal by response surface methodology were significant, which predicted the optimal conditions being initial substrate C/N ratio 29.93, TS 6.98%, and biochar dosage 9.98% substrate. The optimized CMY_o and VS_substrate removal rates were 17.7% and 22.1% higher, respectively, than those of the control. These results support the utilization of biochar in improving the Co-AD of agricultural wastes, which have made significant contributions to improving anaerobic digestion of poultry litter with wheat straw supplemented with biochar particles.
• In Georgia, Dr. Chai’s team made significant advancements in applying machine vision and artificial intelligence technologies to precision poultry farming. Recognizing the importance of rooster behaviors—such as mating and movement—as indicators of productivity and welfare, the team addressed the challenges associated with manual behavior identification, which is often time-consuming and prone to cognitive bias and fatigue. To overcome these limitations, Dr. Chai’s group successfully implemented deep learning-based object detection techniques, particularly leveraging the YOLO (You Only Look Once) family of models, renowned for their real-time processing capabilities and accuracy. Unlike traditional detection methods, YOLO directly predicts bounding boxes and class probabilities in a single pass, offering a faster and more efficient approach. Originally introduced by Joseph Redmon in 2015, YOLO has become a leading framework across various industries, including agriculture—for its speed and precision. Dr. Chai’s research team effectively adapted YOLO models to detect roosters in complex environments such as cage-free (CF) poultry houses. This work marks a major step forward in the automation of animal identification in CF facilities, where no existing system currently distinguishes between hens and roosters. The study focused on detecting birds based on phenotypic traits such as comb size and body size, and it included a comparative analysis of model performance metrics. These accomplishments not only demonstrate the feasibility of applying deep learning in commercial poultry systems but also pave the way for more intelligent, data-driven management tools in the poultry industry.
• In Idaho, Dr. Chen’s team worked with other S1074 team members across the nation on holding the Waste to Worth 2025 conference in Boise during April 8-11, 2025. The Waste to Worth conference provided an engagement platform for S1074 members, livestock producers, and livestock industry partners to share ideas, research findings, and practices that support/improve a sustainable livestock industry. They contributed to the Idaho Sustainable Agriculture Initiative for Dairy (ISAID) project, a USDA Sustainable Agriculture Systems initiative, which involved principal investigators from Washington and North Carolina.
• In Minnesota, Dr. Cortus’ team has focused their research and extension effort on “Building Value in Baselines.” A Midwest multistate team used focus groups to evaluate the value of the dairy industry-promoted assessment tool, FARM ES. Furthermore, the focus group participants identified the feasible management strategies and actor-networks necessary to move sustainability initiatives forward. Building from this work and publication (Erickson et al., 2025), S1074 supported a workshop at the 2025 Waste to Worth Conference in Boise, ID, to accelerate adoption by strengthening a community of support for sustainability initiative practices. Options for mitigation pathways require a variety of advisory services. Through the workshop and participants, an accessible guide of resources to support sustainable action evolved and is publicly available at https://lpelc.org/moving-the-sustainability-needle/. This work involved MN and NC members, with partners from SD, NE, the National Pork Board, and Dairy Management Inc.
• In North Carolina, Dr. Sharara, in collaboration with Dr. Cortus at the University of Minnesota, developed and delivered a workshop, Moving the “Sustainability” Needle, to provide insights and exchange expertise on resources, opportunities and challenges in supporting the food animal industry’s sustainability efforts. As a product of this workshop, the team produced a workshop findings document aggregating the gained perspectives and making it public to practitioners and industry stakeholders. Dr. Sharara is working in collaboration with S-1074 colleagues from Iowa (Dr. Andersen and Dr. Ramirez) and Minnesota (Dr. Cortus) through a funded project by the National Pork Board (NPB) to investigate opportunities to improve nutrient cycling in the pork value chain. Through this project, collaborators are analyzing different stages of the pork value chain to examine interventions to reduce nutrient loss to ecosystems such as air, water, and soil emissions. Findings from this project will provide data and information necessary for recommendations for improving nutrient cycling.

• In Ohio, Dr. Zhao and her team have focused their research and extension effort on Objectives 1 and 3.

• For Objective 1, Dr. Zhao participated and presented air quality research at the Ohio Poultry Sustainability Summit organized by the Ohio Poultry Association on Oc. 10, 2024. Many large Ohio poultry producers participated in the Summit. University research, private industry products and services, and government programs supporting the sustainable development of poultry production were presented and discussed. Producers' feedback valued the direct personal connection and interactive discussions and Q&A sessions. Potential areas of collaboration were discussed. A Virtual Forum-“Dust & Disease in Egg Production” was organized on June 12. 2025 through collaborative efforts by a group of peers (Lingying Zhao, Professor and Extension Specialist, The Ohio State University; Brett Ramirez, Egg Industry Center, Associate Prof. Iowa State University; Lisa Bielke, Prestage Distinguished Scholar of Turkey Health, Prestage Department of Poultry Science, NCSU; and Lilong Chai, Associate Professor & Engineering Specialist, Department of Poultry Science, The University of Georgia)
• For Objective 3, Dr. Zhao had developed a new ventilation system for conventional egg production facilities, reviewed dust and pathogen control technologies, and shared the reviews at various research and extension meetings. She presented “Engineering Technologies for Air Quality Control in Poultry Houses” at the 2025 Georgia Precision Poultry Farming Conference -Virtual, held on May 6, 2025 and reviewed dust and pathogen control technologies at the “Virtual Forum-Dust & Disease in Egg Production.”

• In South Dakota, Dr. Yang and his team have accomplished the following tasks:

• He participated in the 2025 Minnkota Annual Meeting in May, organized by Dr. Erin Cortus at the University of Minnesota. He provided an update on animal structure environment research and extension activities in South Dakota. Minnkota is a collaborative association of university extension specialists, government agencies, animal producers, equipment suppliers, and barn builders, all focused on advancing sustainability in animal production.
• Yang’s team continued its collaboration with Dr. Yuanhui Zhang at the University of Illinois at Urbana-Champaign on a swine air quality project. This work involved visits to ten commercial swine farms for particulate matter sampling and monitoring, development of protocols for sampling, laboratory experiments, and data analysis, as well as identification of the best-performing low-cost particulate matter sensors for use in swine barns. A key outcome of this project was the development of a receptor modeling-based approach for particulate matter source attribution.
• Additionally, Dr. Yang’s team successfully developed an Excel-based odor footprint tool (NDOFT) for North Dakota, in partnership with the North Dakota Pork Council and the North Dakota Livestock Alliance. To support adoption of the tool, an online training workshop was delivered to eight animal industry representatives across the state, accompanied by the creation of two user guidance documents.
• Yang also continued his service on the Ag Cybersecurity Curriculum development team within the SDSU Extension program. During the reporting period, he contributed to the publication of five Extension articles. Other outreach efforts included two Extension trailers, one Extension presentation at the SD Ag Horizon conference, and a podcast interview. Furthermore, he delivered two Extension talks on odor and air quality to approximately 50 animal producers as part of the state CAFO Environmental Training, and four additional talks on manure safety, reaching around 120 participants.

• In TX, Dr. Liu maintains the Youtube channel @TexasManure, The content includes topics such as:

• Small-scale composting systems
• Food waste composting technologies
• Food waste anaerobic digesters
• Composting interviews with industry practitioners
• “Insights from Biosecurity Experts” series

• CA and USDA ARS Idaho engaged in a project to evaluate pre and post installation of vermifiltration on commercial dairy operation(s). This innovative manure management system will be a key innovation in food and farming systems should it prove effective. The research will facilitate evaluation of CA Air Resources Board spreadsheet to estimate emission reductions compared with the EU Cool Farm Tool. Comparisons of spreadsheet and tool-based estimates to actual emissions will be made.
• CA also evaluated nutrient uptake from duckweed at commercial scale in late summer/fall of 2024. However, by end of spring 2025 the commercial venture shuttered its doors due to insufficient financing.
• In Wisconsin, Dr. Akdeniz and his team managed to align their research and extension closely with the S1074 Objectives.

• For Objective 1, the team developed and shared articles and podcasts on the UW-Madison Extension website, including guidelines on ventilation design in dairy buildings, air quality, lighting, and labor efficiency in automated dairy operations. These resources help producers evaluate housing and management decisions. Research findings have been presented at the 2024 and 2025 ASABE Annual Meetings and the 2025 Midwest Climate Summit to broaden outreach. As we have made progress with our research and extension projects, we are ready to develop more collaborations in 2026.
• For Objective 2, the team used computational fluid dynamics (CFD) models to assess ventilation design and mitigate heat stress in dairy buildings. UAV-based methods are also used to directly measure air emissions from pastures, which enhances our understanding of nitrogen cycling. Together, these tools support sustainability in animal production.
• For Objective 3, the team’s work examined the effectiveness of ventilation systems, supplemental cooling in dairy buildings, and UAV-based monitoring technologies. They also evaluated micro-aeration in anaerobic digesters to improve methane production and reduce hydrogen sulfide emissions. These studies support practical technology adoption and future research on system improvements in animal agriculture.

Journal Articles

1. Zhan, Y., Zuo, B., Cao, X., Xiao, Y., & Zhu, J. (2024). Biochar enhanced anaerobic co-digestion of poultry litter and wheat straw: Performance, microbial analysis, and multiple factors’ interaction. Renewable Energy, 231, 120907. https://doi.org/10.1016/j.renene.2024.120907
2. Paneru, D., Sharma, M. K., Goo, D., Shi, H., Applegate, T. J., Chai, L., ... & Kim, W. K. (2025). Interactive effects of dietary deoxynivalenol and coccidial infection on growth performance, immune response, oxidative status, and gut health in pullets. Poultry Science, 105462.
3. Paneru, B., Bist, R. B., Yang, X., Dhungana, A., Dahal, S., & Chai, L. (2025). Deep Learning Methods for Automatic Identification of Male and Female Chickens in a Cage-Free Flock. Animals, 15(13), 1862.
4. Yang, X., Lu, G., Zhang, J., Paneru, B., Dhungana, A., Dahal, S., Bist, R. B., & Chai, L. (2025). Tracking Poultry Drinking Behavior and Floor Eggs in Cage-Free Houses with Innovative Depth Anything Model. Applied Sciences, 15(12), 6625.
5. Yang, X., Zhang, J., Paneru, B., Lin, J., Bist, R. B., Lu, G., & Chai, L. (2025). Precision Monitoring of Dead Chickens and Floor Eggs with a Robotic Machine Vision Method. AgriEngineering, 7(2), 35. (Cover story).
6. Subedi, S., Bist, R. B., Yang, X., Li, G., & Chai, L. (2025). Advanced Deep Learning Methods for Multiple Behavior Classification of Cage-Free Laying Hens. AgriEngineering, 7(2), 24.
7. Yang, X., Bist, R. B., Subedi, S., Guo, Y., & Chai, L. (2025). The Application of Probiotics and Prebiotics in Poultry Production and Impacts on Environment: A Review. Encyclopedia, 5(1), 35.
8. Islam, M. N., I. H. Mahdy, L. Chen, S. Wu, and B. He. 2024. Enhanced phosphorus bioavailability and reduced water leachability in dairy manure through hydrothermal carbonization: effect of processing temperature and CaO additive. Environmental Technology. https://doi.org/10.1080/09593330.2024.2430802
9. Erickson, M., Rovai, M., Villamediana, P., Schmidt, A. M., Stowell, R. R., & Cortus, E. L. (2025). Building value for dairy farmers and advisors in the Farmers Assuring Responsible Management Environmental Stewardship Program. Translational Animal Science, 9, txaf038. https://doi.org/10.1093/tas/txaf038
10. Uguz, S., Sahin, Y.S., Kumar, P., Yang, X., Anderson, G. (2025). Real-time algal monitoring using novel machine learning approaches. Big Data and Cognitive Computing, 9(6), 153.
11. Alahe, M. A., Chang, Y., Kemeshi, J., Won, K., Yang, X., Wei, L. (2025). Real-time agricultural image encryption algorithm using AES on edge computing devices. Computers and Electronics in Agriculture, 237, 110594.
12. Haleem, N., Yuan, J., Uguz, S., Ucok, S., Gu, Z., Yang, X. (2025). Direct current (DC)-initiated flocculation of Scenedesmus dimorphus. Environmental Science and Pollution Research, 32(17), 11292-11298.
13. Ucok, S., Yang, X. (2025). Chemical composition and methane production potential of agricultural residues: Olive pomace, cottonseed meal, and red pepper processing waste. Tekirdağ Ziraat Fakültesi Dergisi 22 (1), 195-204.
14. Gong, A., Wang, G., Qi, X., He, Y., Yang, X., Huang, X., Liang, P. (2025) Energy recovery and saving in municipal wastewater treatment. Nature Sustainability, 8, 112-119.
15. Kumar, P., Tiwari, S., Uguz, S., Li, Z., Samuel, S., Gonzalez, J., Zhang, Y., Yang, X. (2024). Bioaerosol downwind from animal feeding operations: A comprehensive review. Journal of Hazardous Materials, 480, 135825.
16. Alahe, M. A., Wei, L., Chang, Y., Gummi, S. R., Kemeshi, J., Yang, X., Won, K., Sher, M. (2024). Cyber security in smart agriculture: Threat types, current status, and future trends. Computers and Electronics in Agriculture, 226, 109401.
17. Akdeniz, N. L. Polzin. 2025. Ventilation fans offset potential reductions in milk margin from heat stress in Wisconsin dairy farms. Agriculture, 15(9): 955. https://doi.org/10.3390/agriculture15090955
18. Yi, Y., N. Akdeniz, JM. Shutske, CY. Choi. 2025. Mitigating heat stress for agricultural workers using computational fluid dynamics (CFD). Energy and Buildings, 328, 115186. https://doi.org/10.1016/j.enbuild.2024.115186
19. Jiang, L. Y. Yi, N. Akdeniz. 2024. Energy-saving cooling strategies for tunnel-ventilated dairy buildings: Computational fluid dynamics simulations and validation. Smart Agricultural Technology, 100576. https://doi.org/10.1016/j.atech.2024.100576
20. Yang, D., Y. Wang, N. Akdeniz. 2024. Developing and field testing an unmanned aerial mapping method to measure air emissions from dairy pastures. Remote Sensing, 16 (16), 3007. https://doi.org/10.3390/rs16163007
21. Jiang, L. Y. Yi, N. Akdeniz. 2024. CFD simulations of supplemental cooling techniques in cross-ventilated dairy buildings and associated greenhouse gas emissions. Computers and Electronics in Agriculture, 108480. https://doi.org/10.1016/j.compag.2023.108480
22. Gunawardana, D., Wang, X., Mahdaviarab, A., McCubbins, O. P., Landaverde, R., & Liu, Z. (2025). Virtual reality videos for delivery of extension educational materials on manure and mortality management: A pilot-study. The Journal of Agricultural Education and Extension, 1-23
23. Mahdaviarab, A., Pahlavanyali, K., Cheng, R., Wang, X., Doria, J., Howe, J. A., Pineiro, J. M., Spencer, J., & Liu, Z. (2025). Emergency mass disposal of milk: Options and considerations. Journal of Environmental Management, 376, 124420.
24. Zhang, Y., Lei, B., Mahdaviarab, A., Wang, X., & Liu, Z. (2025). Robust biochar yield and composition prediction via uncertainty-aware ResNet-based autoencoder. Biochar, 7(1), 1-16

Conference Proceedings

1. Islam, M. N., B. He., and L. Chen. 2025. Phosphorus recycling from dairy manure via hydrochar-experience from the lab-scale to pilot-scale hydrothermal carbonization prototype. Waste to Worth 2025, Boise, ID, April 8-11, 2025
2. Das, A. K., and L. Chen. 2025. Ammonia recovery from anaerobically digested dairy manure using electrodialysis coupled with a hydrophobic gas-permeable membrane for stripping. Waste to Worth 2025, Boise, ID, April 8-11, 2025.
3. Das, A. K., and L. Chen. 2025. Modeling of electrochemical ammonia removal from anaerobically digested dairy wastewater. Waste to Worth 2025, Boise, ID, April 8-11, 2025.
4. Chen, L., M. N., Islam, and B. He, 2025. Hydrochar carbonization of dairy manure for phosphorus recovery and runoff risk mitigation. 2025 WSCS Annual Conference, Walla Walla WA, June 24-25, 2025
5. Chen, L., and A. K. Das, 2025. Ammonia recovery from anaerobically digested dairy wastewater facilitated by in-situ acid and base generation in a transmembrane electro-chemisorption system. 2025 WSCS Annual Conference, Walla Walla WA, June 24-25, 2025
6. Chen, L., M. N., Islam, and B. He. 2025. Phosphorus recycling from dairy manure via hydrochar-experience from the lab-scale to pilot-scale hydrothermal carbonization prototype. Waste to Worth 2025, Boise, ID, April 8-11, 2025
7. Das, A. K., and L. Chen. 2025. Ammonia recovery from anaerobically digested dairy manure using electrodialysis coupled with a hydrophobic gas-permeable membrane for stripping. Waste to Worth 2025, Boise, ID, April 8-11, 2025.
8. Das, A. K., and L. Chen. 2025. Modeling of electrochemical ammonia removal from anaerobically digested dairy wastewater. Waste to Worth 2025, Boise, ID, April 8-11, 2025.
9. Islam, M.N., B. He, and L. Chen. 2025. Hydrochar carbonization of dairy manure for phosphorus recovery and runoff risk mitigation. Western Nutrient Management Conference, Reno, NV, March 4-6, 2025
10. Das, A. K., and L. Chen. 2025. Ammonia recovery from anaerobically digested dairy wastewater facilitated by in-situ acid and base generation in a transmembrane electro-chemisorption system. Western Nutrient Management Conference, Reno, NV, March 4-6, 2025.
11. Kumar, P., Uguz, S., Tiwari, S., Chang, Y., Yang, X. (2025). Field testing of low-cost PM sensors in animal production facilities. In 2025 Air Quality Measurement Methods and Technology Conference, Aurora, CO.
12. Yang, Y., Thaler, R., Yang, X. (2025). Developing an odor footprint tool for animal agriculture in North Dakota. In 2025 ASABE North Central Regional Section Meeting, Fargo, ND.
13. Khan, T., Yang, X. (2025). LoRaWAN-enabled IoT solution for smart farming. In 2025 ASABE North Central Regional Section Meeting, Fargo, ND.
14. Yang, X. (2024). Particulate matter in swine barns. In Midwest Regional Agricultural Safety and Health 2024 Conference, Ames, IA.
15. Ly, N. N. Akdeniz, Z. Zeng, C. Choi. 2025. Testing the efficacy of positive-pressure ventilation systems (PPTV) for indoor calf housing using computational fluid dynamics (CFD) simulations, ASABE Annual International Meeting, Toronto, Canada.
16. Jiang, L., N. Akdeniz. 2025. Ventilation design for calf hutches using computational fluid dynamics (CFD) simulations, ASABE Annual International Meeting, Toronto, Canada.
17. Froelich, E. N. Akdeniz. 2025. Optimizing microaeration rates in anaerobic digesters: comparative analysis under mesophilic and thermophilic conditions, ASABE Annual International Meeting, Toronto, Canada. 
18. Akdeniz, N. 2025. Online calculators for computing ventilation requirements of dairy buildings. ASABE Annual International Meeting, Toronto, Canada. 
19. Yang, D. N. Akdeniz. 2025. Direct air emission measurements using small-unmanned aircraft systems (sUAS) from livestock pastures in Wisconsin. ASABE Annual International Meeting, Toronto, Canada. 
20. Yang, D., N. Akdeniz. 2025. Direct measurement of spatial greenhouse gas emissions from livestock pastures. Midwest Climate Summit, Madison, WI.
21. Yang, D., N. Akdeniz. 2024. Quantifying greenhouse gas emissions from dairy pastures using a flying air analyzer. ASABE Annual International Meeting, Anaheim, CA.
22. Froelich, E., N. Akdeniz. 2024. Improving anaerobic digestion of dairy manure by reducing hydrogen sulfide production through microaeration. ASABE Annual International Meeting, Anaheim, CA.
23. Li, J., N. Akdeniz. 2024. Ventilation design for automated milking system (AMS) buildings. ASABE Annual International Meeting, Anaheim, CA.
24. Cheng, R., Mahdaviarab, A., Pahlavanyali, K., Wang, X., Wang, H., and Liu, Z. Optimizing Biogas Production Through Anaerobic Co-Digestion of Poultry Carcasses and Litter. 2025. ASABE Annual International Meeting, Toronto, Canada.
25. Pahlavanyali, K., Mahdaviarab, A., Cheng, R., Kincaid, N., Habib, M. R., Wang, X., Wang, H., and Liu, Z. Valorizing Organic Waste: Assessing the Fertilization Potential of Black Soldier Fly (Hermetia illucens) By-Products in Tomato Cultivation. 2025. ASABE Annual International Meeting, Toronto, Canada.

Thesis/Dissertations

 Cherotich, S. (2025). Depositions of Gas Phase NH3 and Particle Phase NH4+ in the Vicinity of Poultry Production Facilities. Ph.D. dissertation. Department of Biological and Agricultural Engineering, North Carolina State University, Raleigh, NC.

1. Jones, K. (2025). Technical and Economic Considerations of Anaerobic Digestion in Partially Nitrified Swine Manure. M.S. thesis. Department of Biological and Agricultural Engineering, North Carolina State University, Raleigh, NC.
2. Khan, T. (2025). LoRaWAN-enabled IoT solutions for smart farming. M.S. thesis, South Dakota State University, Brookings, SD.
3. Froelich, E. (2025). Optimizing microaeration in anaerobic digesters: A comparative study of batch and continuous systems under mesophilic and thermophilic conditions, M.S. thesis, University of Wisconsin-Madison, Madison, WI.  

1. Zhou, Run. Novel Ag-Containing Photocatalysts and Their Performance Regulation and Applications to Hazard Organic Degradation. PhD diss., Water Management and Hydrological Science, 2025. Chairs: Zong Liu and Virender K. Sharma

Extension and Outreach

1. Chai, L (July 8, 2025). Machine Vision Technologies for Automatic Identification of Male and Female Chickens.
2. Chai, L (June 26, 2025). The 4th U.S. Precision Livestock Farming Conference.
3. Chai, L (June 16, 2025). Tracking Poultry Drinking and Floor Eggs with an Innovative Depth Anything Model.
4. Chai, L (April 27, 2025). Deep Learning Systems for Automatic Egg Grading.
5. Chai, L (February 28, 2025). A Robotic Machine Vision System for Tracking Dead Chickens.
6. Chai, L (January 31, 2025). Monitoring Perching Behavior of Cage-free Hens with Machine Vision.
7. Erickson, M., Sharara, M., & Cortus, E. (2025). Moving the “Sustainability” Needle. Workshop In Proceedings of the 2025 Waste to Worth Conference, Boise, ID. April 7-11, 2025. https://lpelc.org/moving-the-sustainability-needle/
8. Erickson, M., Sharara, M., & Cortus, E. (2025). Building Value in Baseline Sustainability Assessments. Workshop In Proceedings of the 2025 Waste to Worth Conference, Boise, ID. April 7-11, 2025. https://lpelc.org/building-value-in-baseline-sustainability-assessments/
9. Wang-Li, L. (2024) The Role of Agriculture in Atmospheric Nitrogen Deposition: Sources, Impacts, and Management. Livestock and Poultry Environmental Learning Community (LPELC) Monthly Webinars. September 23, 2024. Recording link: https://lpelc.org/the-role-of-agriculture-in-atmospheric-nitrogen-deposition-sources-impacts-and-management/
10. Zhao, L.Y. 2025. Engineering technologies for air quality control in poultry houses. Invited presentation at 2025 Georgia Precision Poultry Farming Conference-Virtual. May 6, 2025.
11. Zhao, L.Y., T. Lim, and L. Chai.  2025. A review of dust and pathogen control technologies in poultry production facilities. Invited presentation at Virtual Forum-Dust & Disease in Egg Production. June 12, 2025      
12.  Zhao, L.Y.  2025. A new ventilation system to improve indoor environment and abate pathogen transmission in layer houses. Invited presentation at Virtual Forum-Dust & Disease in Egg Production. June 12, 2025   
13. Zhao, L.Y. 2025. Measurement, Modeling, and Mitigation of Indoor Environment, Air Quality, and Air Emissions at Poultry Facilities. Invited presentation at the Ohio Poultry Association Summitt, Oct. 10, 2024.
14. Yang, X., Nafchi, A., Brennan, J., Mehan, S., Vandermark, L., Sellars, S., Smart, A., Chang, Y., Wang, Y. (2025). Protecting Your Data: The Role of Authentication and Encryption in Agricultural Cybersecurity, SDSU Extension.
15. Brennan, J., Vandermark, L., Mehan, S., Nafchi, A., Sellars, S., Yang, X. (2025). Be Cyber Aware: Text Message Cyber-Attacks (SMS Phishing - Smishing), SDSU Extension.
16. Yang, X., Nafchi, A., Brennan, J., Mehan, S., Sellars, S., Vandermark, L. (2024). Choosing the Right Wireless Network Technologies for Agricultural IoT Applications. SDSU Extension.
17. Brennan, J., Vandermark, L., Sellars, S., Mehan, S., Nafchi, A. M., Yang, X. (2024). The Growing Threat of Cyber Attacks in Agriculture. SDSU Extension.
18. Nafchi, A., Smart, A, Yang, X., Mehan, S., Brennan, J. (2024). Cybersecurity Vulnerabilities in Precision Agriculture. SDSU Extension.
19. Akdeniz, N. Before You Buy: A Farm Tech Investment Planning Guide, 2025 (link)
20. Akdeniz, N. Balancing Technology and People: The Evolving Role of Farm Workers in Automation, 2025 (link)
21. Akdeniz, N. Balancing Ventilation Costs and Milk Production Losses on Wisconsin Dairy Farms, 2025 (link)
22. Akdeniz, N. Lighting in Dairy Buildings in Wisconsin, 2025 (link)
23. Akdeniz, N. Ventilation Fan Noise in Dairy Buildings, 2025 (link)
24. Akdeniz, N. Tunnel-ventilated dairy buildings, 2025 (link)
25. Akdeniz, N. Cross-Ventilation in Dairy Buildings, 2025 (link)
26. Akdeniz, N. Natural Ventilation in Dairy Buildings, 2025 (link)
27. Akdeniz, N. Air Quality in Calf Housing, 2025 (link)
28. Akdeniz, N. Renovating Tie-Stall Barns for Indoor Calf Housing, 2024 (link)
29. Akdeniz, N. Ventilation in Dairy Buildings, 2024 (link)
30. Dairy Manure Management Workshop. Foundation for Food & Agriculture Research. July 2025, Denver, CO
31. Manure Centrifuge & Dealing with Struvite. DOPA (Central TX), April 2025. Stephenville, TX
32. TAMU AGSM 337 Guest Lecture: Anaerobic Lagoons. April 2025. College Station, TX
33. Manure Happens: Dr. Zong Liu on Manure and Compost Management. Colorado State University AgNext podcast Ep.19. February 2025, Fort Collins, CO
34. Manure and Mortality Management. Colorado State University General Seminar, Department of Animal Science. February 2025, Fort Collins, CO
35. Advancing Manure Management in Texas. Seminar at Texas Tech CASFER, an NSF Engineering Research Center. January 2025, Lubbock, TX
36. Manure Management. NRCS Nutrient Management Training, November 2024, Canyon, TX
37. Digesters, Mortality Management, and Climate Smart Program Enrollment. DOPA (East Texas). October 2024, Sulphur Spring, TX