Konrad Mathesius

Farm Advisor

Woodland Administrative Office
70 Cottonwood Street
Woodland, CA 95695
(530) 666-8704
kpmathesius@ucanr.edu

http://cecapitolcorridor.ucanr.edu

http://ccagronomy.ucanr.edu

Also in:
Yolo County

Specialty

Areas of Expertise (click to see all ANR academics with this expertise)

• Field Crops
• Field Crops - General
• Forage Crops
• Forage Crops - General
• Alfalfa
• Hay
• Silage and Green Chop
• Cotton
• Cotton - General
• Beans, Dry
• Beans, Dry - General
• Oil / Oilseed Crops
• Oil / Oilseed Crops - General
• Grains
• Grains - General
• Soil and Land
• Soil
• Water
• Conservation and Efficient Use of Water
• Soil
• Appraisal of Soil Resources
• Soil, Plant, Water, Nutrient Relationships
• Spanish
• Agriculture
• Pest Management/Diseases
• Ipm

Bibliography

Peer Reviewed

• Nelsen, Taylor S.; Rodriguez, Michael, et al.; McCullough, Ethan; Serena N. Lewin, Daniel J. Geisseler; Mathesius, Konrad; Becker, Taylor; Rosa, Gabriel G.; Lundy, Mark E. (2022). Improvements to the soil nitrate quick test for California small grains. California Agriculture. UCANR. 76:2. 08/01. https://calag.ucanr.edu/archive/?article=ca.2022a0009
• Santiago, Suzette; Light, Sarah E., et al.; Clark, Nicholas E.; Wang, Zheng; Mathesius, Konrad; Geissele, Daniel (2022). Seasonal Net Nitrogen Mineralization in the Topsoil of Subsurface Drip Irrigated Fields. Communications in Soil and Plant Analysis. 54:5, 627-639. 08/23. https://www.tandfonline.com/doi/abs/10.1080/00103624.2022.2118305
• Mitchell, Jeffrey P. (2017). "Cover cropping and no-tillage improve soil health in an arid irrigated cropping system in California’s San Joaquin Valley, USA." Soil and Tillage Research 165: 325-335.

Non-Peer Reviewed

• CDFA, Irrigation and Nitrogen Management (2022). Cal Dept. of Food and Agriculture: Irrigation and Nitrogen Management Program Training Modules (editing and voiceovers). CDFA. 08/15.
• Mathesius, Konrad (2022). Lessons from Dealing with Italian Ryegrass in California Small Grains. Sacramento Valley Field Crops Agronomy Newsletter (Sutter-Yuba). Sept 16.
• Mathesius, Konrad (2022). N-Rich Reference Zone Case Studies: Yolo County (rainfed) 2020-2021. January 15. https://ucanr.edu/sites/small-grains/files/359218.pdf
• Lundy, Mark; Nelson, Taylor, et al.; Mathesius, Konrad; Grover, Salvador (2022). N-Rich Reference Zone Case Study: Yolo County (irrigated) 2020-2021. UC ANR Agronomy Research Information Center. January 15. https://ucanr.edu/sites/small-grains/files/373871.pdf
• Mathesius, Konrad; Willson, Eric, et al.; Rominger, Rick; Levinson, Micah; Nelsen, Taylor; Lundy, Mark (2022). N-Rich Reference Zone Case Study: Yolo County (irrigated) 2021-2022. UC ANR Agronomy Research Information Center. September 30. https://ucanr.edu/sites/small-grains/files/377055.pdf
• Mathesius, Konrad; Maier, Gabriele, et al.; Davy, Josh (2021). Drought conditions may increase the chances for risky levels of nitrate in forages. Progressive Forage. Progressive Forage. April 16. https://www.progressiveforage.com/news/industry-news/drought-conditions-may-increase-the-chances-for-risky-levels-of-nitrate-in-forages
• Mathesius, Konrad; Maier, Gabriele, et al.; Davy, Josh (2021). Drought Conditions May Increase the Chances for Risky Levels of Nitrate in Forages. UC Alfalfa and Forage News Blog.M. Lundy, B. Karle, J. Heguy and D. Putnam. April 8. https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=46309
• Mathesius, Konrad; Maier, Gabriele, et al.; Davy, Josh (2021). Drought Conditions May Increase the Chances for Risky Levels of Nitrate in Forages. UC Small Grains Blog.M. Lundy, B. Karle, J. Heguy and D. Putnam. University of California. April 20. https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=46409
• Mathesius, Konrad (2021). Harvest Weed Seed Control in California: Potential and Limitations. UC Small Grains Blog.T. Getts, J. Dias, B. Hanson and M. Lundy. University of California. March 18. https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=46136
• Mathesius, Konrad; Getts, Thomas, et al.; Dias, José Luiz Carvalho de Souza Dias (2021). Harvest Weed Seed Control in California: Potential and Limitations. UC Weed Science Blog.B. Hanson and M. Lundy. March 16. https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=46112
• Mathesius, Konrad (2021). Harvest Weed Seed Control in California: Potential and Limitations. California Dairy Magazine. 30:4. April 2. https://californiadairymagazine.com/2021/04/02/harvest-weed-seed-control-in-california-potential-and-limitations/
• Mathesius, Konrad; Luncy, Mark, et al.; Clark, Nicholas; Dias, Jose Luiz Carvalho de Souza Dias (2021). Irrigation for wheat and other small grains in a drought year. UC Small Grains Blog. June 11. https://ucanr.edu/blogs/smallgrains/index.cfm?start=6
• Mathesius, Konrad (2021). Irrigation Strategies for Corn During Drought Years. Golden State Dairy Newsletter.M. Lundy and B. Karle. July 5. https://ucanr.edu/sites/Dairy/newsletters/California_Dairy_Newsletter90213.pdf
• Mathesius, Konrad (2021). Nitrogen Management Tools and Research Updates Webinar with Konrad Mathesius. Sacramento Valley Field Crops Blog. Sept 16. https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=50473
• Dias, Jose Luiz Carvalho de Souza Dias; Clark, Nicholas, et al.; Mathesius, Konrad; Light, Sarah; Hanson, Brad; Lundy, Mark; Shrestha, Anil (2021). Poor control of common chickweed with ALS-inhibitor herbicides reported in multiple small grain fields in the southern San Joaquin Valley. Is it a new case of herbicide resistance in California? UC Small Grains Blog. August 4. https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=50186
• Lundy, Mark; Nelson, Taylor, et al.; Grover, Salvador (2021). Preliminary yield results from fall-planted 2020-21 small grain variety trials. UC Small Grains Blog.K. Mathesius, N. Clark, L. Reynoso, M. Shydlowski-Besmer, R. Solorio, B. Halleck and C. Muraka. University of California. August 11. https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=50239
• Mathesius, Konrad (2021). University of California Nitrogen Fertilizer Management Webtool for California Wheat [v2]. UC ANR Sacramento Valley Field Crops Channel. YouTube, UC ANR Sacramento Valley Field Crops, YouTube. Oct 1. https://youtu.be/9lSzIU0oLz4
• Light, Sarah; Mathesius, Konrad, et al.; Harper, Liz (2021). Video: Soil Health Connection, Konrad Mathesius, Biosolids, UC Agronomy Advisor. Soil Health Connection (YouTube Channel). YouTube, The Soil Health Connection, YouTube. Jul 8. https://www.youtube.com/watch?v=lWPjca7J514
• Lundy, Mark; Nelson, Taylor, et al.; Mathesius, Konrad; Clark, Nicholas; Light, Sarah; Leinfelder-Miles, Michelle; Getts, Thomas; Galdi, Giuliano (2020). Achieving Efficient Nitrogen Fertilizer Management in California Wheat. FREP/ WPHA Annual Conference Proceedings 2020. 28, 93-97. Oct 28. https://www.cdfa.ca.gov/is/ffldrs/frep/pdfs/Proceedings_2020.pdf
• Clark, Nicholas; Getts, Thomas, et al.; Galdi, Giuliano; Nelson, Taylor; Leinfelder-Miles, Michelle; Light, Sarah; Mathesius, Konrad; Lundy, Mark (2020). Hand Held Electronic Devices Help You Make Better Nitrogen Fertilizer Decisions. UC Small Grains Blog. https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=42903, University of California. June 30, 2020.
• Leinfelder-Miles, Michelle; Clark, Nicholas, et al.; Light, Sarah; Mathesius, Konrad; Nelson, Taylor; Getts, Thomas; Galdi, Giuliano (2020). Implementing N-Rich Reference Zones to Inform In-Season N Fertilization Practices. UC Small Grains Blog. University of California. May 27. https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=42576
• Mathesius, Konrad; Lundy, Mark, et al.; Nelsen, Taylor (2020). In-Field Soil Nitrate Quick Test- California Small Grain Production (video).D. Giang. http://smallgrains.ucanr.edu/Nutrient_Management/snqt/, University of California. April 23, 2020.
• Mathesius, Konrad; Nelsen, Taylor, et al.; Lundy, Mark (2020). Malting Barley: New Resources Available. UC Small Grains Blog. October 9.
• Lundy, Mark; Nelson, Taylor, et al.; Mathesius, Konrad; Clark, Nicholas; Light, Sarah; Leinfelder-Miles, Michelle; Getts, Thomas; Galdi, Giuliano (2020). N management case studies: Utilizing N-rich reference zones in California small grain crops. UC Small Grains Blog. October 16. https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=43958
• Lundy, Mark; Nelson, Taylor, et al.; Mathesius, Konrad; Clark, Nicholas; Light, Sarah; Leinfelder-Miles, Michelle; Getts, Thomas; Galdi, Giuliano (2020). N management case studies: Utilizing N-rich reference zones in California small grain crops. UC Small Grains Blog. October 16.
• Nelsen, Taylor; Mathesius, Konrad, et al.; Lundy, Mark (2020). N Management for California Malting Barley. Agronomy Research and Information Center Fact Sheets. https://ucanr.edu/sites/small-grains/files/338120.pdf, University of California. 13. September 2020.
• Lundy, Mark; Nelson, Taylor, et al.; Mathesius, Konrad; Clark, Nicholas; Light, Sarah; Leinfelder-Miles, Michelle; Getts, Thomas; Galdi, Giuliano (2020). New Resources Available for Conducting and Interpreting Soil Nitrate Quick Tests. UC Small Grains Blog. https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=41422, University of California. May 13, 2020.
• Mathesius, Konrad; Lundy, Mark (2020). Nitrogen Management in Small Grains Webinar. Sacramento Valley Field Crops. University of California. October 30. https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=44070
• Lundy, Mark; Nelson, Taylor, et al.; Mathesius, Konrad; Clark, Nicholas; Light, Sarah; Leinfelder-Miles, Michelle; Getts, Thomas; Galdi, Giuliano (2020). N-Management Case Studies: Utilizing N-rich in California Small Grain Crops. UC Small Grains Blog. University of California. October 16. https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=43958
• Mathesius, Konrad; Nelsen, Taylor, et al.; Durst, Fritz; Lundy, Mark (2020). N-Rich Reference Zone Case Study, Yolo 2019-2020. UC Agronomy Research and Information Center 2019-2020 N-rich Reference Zone Case Studies. August 2020. https://ucanr.edu/sites/small-grains/files/337602.pdf
• Nelsen, Taylor; Mathesius, Konrad, et al.; Lundy, Mark (2020). Seeding Rate Calculator (Wheat). UC Agronomy Research and Information Center. September 2020. http://smallgrains.ucanr.edu/General_Production/Seeding_Rate/
• Mathesius, Konrad; Nelsen, Taylor, et al.; Lundy, Mark (2020). Seeding Rate Calculator Now Available. UC Small Grains Blog. October 23. https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=43999
• Mathesius, Konrad; Nelsen, Taylor, et al.; Lundy, Mark (2020). Variety Selection in Malting Barley. Agronomy Research and Information Center Fact Sheets. 12. September 2020. https://ucanr.edu/sites/small-grains/files/337345.pdf
• Long, Rachael, Michelle Leinfelder-Miles, Konrad Mathesius, Khaled Bali, Sarah Light, Mariano Galla, Shannon Mueller, Allan Fulton, Nicholas Clark, Roland D. Meyer (2019). Garbanzo Bean (Chickpea) Production in California. Davis, CA, University of California.
• Mathesius, Konrad (2019). Herbicide Resistant Italian Ryegrass in California: Identification and Strategies for Control. February 15, 2019. https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=29418
• Mathesius, Konrad, Brad Hanson, Mark Lundy (2019). Research Update: Efficacy of Mechanical and Chemical Preseason Control of Herbicide-Resistant Italian Ryegrass. UC ANR Sacramento Valley Field Crops Blog, UC ANR. 2019:9.30.2019, Review of research done in 2018-2019 on control techniques for Italian ryegrass in rainfed wheat in Yolo Coutny California. https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=31478
• Mathesius, Konrad; Hanson, Brad, et al.; Lundy, Mark (2019). Research Update: Efficacy of mechanical and chemical preseason control of herbicide-resistant Italian ryegrass. UC Small Grains Blog. November 7. https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=38740
• Mathesius, Konrad (2019). Septoria Leaf Blotch: Reducing Inoculum After a Pathogen-friendly Winter.C. Swett. Sacramento Valley Field Crops Blog, UC ANR. 6.16.2019. https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=30817
• Lundy, Mark (2019). Small Grains Variety Testing Results Now Available through UCANR Small Grains Website. Sacramento Valley Field Crops Blog. September 29, 2019. https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=31476
• Mathesius, Konrad (2019). South Sacramento Valley Wheat and Barley FIeld Demonstration Day. Sacramento Valley Field Crops Blog, UC ANR. March 12, 2019. https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=29668
• Mathesius, Konrad (2019). Strip Rust: Be on the Lookout. Sacramento Valley Field Crops Blog, UCANR. March 11,2019. https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=29651
• Long, Rachael (2019). Sunflower Hybrid Seed Production in California. Davis, CA, University of California.
• Mathesius, Konrad (2019). SWEEP Grant Workshop January 30th, 2019. Sacramento Valley Field Crops Blog, UC ANR. January 15, 2019. https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=29152
• Mathesius, Konrad (2019). Top Dressing Wheat: growing degree day models help optimize nitrogen application timing. Sacramento Valley Field Crops Blog, UCANR. February 4, 2019. https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=29300
• Mathesius, Konrad (2018). A Slow Start to Winter Rains: checking your stand before nitrogen topdressing in wheat. Sacramento Valley Field Crops Blog, UC ANR. January, 17, 2018. https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=26116
• Martin, Tunyalee (2018). Broomrape in Field Crops. Sacramento Valley Field Crops. Sacramento Valley Field Crops, UC ANR. June 15, 2018. https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=27481
• Mathesius, Konrad (2018). Controlling Spider Mites in Corn. Sacramento Valley Field Crops Newsletter. Spring 2018:3.
• Reynolds, Cheryl, Konrad Mathesius (2018). DPR License and Certificate Holders: Renew Early! Get those last-minute hours with help from UC IPM. Sacramento Valley Field Crops Blog, UC ANR. October 22, 2018. https://ucanr.edu/blogs/SacValleyFieldCrops/index.cfm?start=16
• Mathesius, Konrad (2018). Have you filled out your Ag Census yet? Sacramento Valley Field Crops, UC ANR. February 14, 2018. https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=26365
• Mathesius, Konrad (2018). Improving Yield and Nitrogen Use Efficiency in California Wheat this Season.R. Long. Sacramento Valley Field Crops Blog, UC ANR. October 19, 2018. https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=28479
• Mathesius, Konrad (2018). Reminder: Grower Meeting this Wednesday, February 21st. Sacramento Valley Field Crops, UC ANR. February 19, 2018. https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=26389
• Mathesius, Konrad (2018). Research Update: Preventing Rodent Damage to Subsurface Drip Irrigation in Cracking Clay Soils. Sacramento Valley Field Crops Newsletter. Email, UC Cooperative Extension. Winter 2018. February 25th, 2018.
• Mathesius, Konrad (2018). Russian Wheat Aphid.M. Lundy. Sacramento Valley Field Crops Blog, UC ANR. March 28, 2018. https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=26719
• Leinfelder-Miles, Michelle (2018). SJF and Delt Field Crops Meeting- January 17th. Sacramento Valley Field Crops Blog, UC ANR. December 11, 2018. https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=28893
• Mathesius, Konrad (2018). Small Grains and Alfalfa/ Forages Field Day May 17th, 2018. Sacramento Valley Field Crops Blog, UC ANR. April 30, 2018. https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=27050
• Mathesius, Konrad (2018). "The Malt Project." Retrieved 6/15/2018, 2018, from
• Mathesius, Konrad (2017). Agricultural Policy Watch: Right to Repair Making Progress Around the US. Sacarmento Valley Field Crops Blog, UC ANR. May 1, 2017. http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=23993
• Mathesius, Konrad (2017). Alternative Crops: Garbanzos. Things to consider and where to get contracts. Sacarmento Valley Field Crops Blog, UC ANR. April 13, 2017. http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=23797
• Mathesius, Konrad (2017). Alternative Crops: Malting Barley. Sacarmento Valley Field Crops Blog, UC ANR. March 23, 2017. http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=23616
• Mathesius, Konrad (2017). Free soil pits and (some) analysis. Sacarmento Valley Field Crops Blog, UC ANR. April 21, 2017. http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=23876
• Mathesius, Konrad (2017). Looking to upgrade your irrigation system? Monitor your soil moisture? The CDFA SWEEP Grant application period is open. Applications due March 14th. Sacarmento Valley Field Crops Blog, UC ANR. Feb 22, 2017. http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=23308
• Mathesius, Konrad (2017). New Agronomy Advisor for Yolo, Sacramento, and Solano Counties. Sacarmento Valley Field Crops Blog, UC ANR. Feb 6, 2017. http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=22087
• Mathesius, Konrad (2017). Rotational Crop Grower Meeting Presentations. Sacarmento Valley Field Crops Blog, UC ANR. Feb 23, 2017. http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=23332
• Mathesius, Konrad (2017). Rotational Crop Grower Meeting this Thursday (February 9th, 2017). Sacarmento Valley Field Crops Blog, UC ANR. Feb 6, 2017. http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=23170
• Mathesius, Konrad (2017). Small Grains and Alfalfa/ Forages Field Day: May 11th, 2017. Sacarmento Valley Field Crops Blog, UC ANR. April 17, 2017. http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=23838
• Mathesius, Konrad (2017). Soils of the Southern Sacramento Valley Field Tour, Thursday October 12th. Sacarmento Valley Field Crops Blog, UC ANR. September 10, 2017. http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=25138
• Mathesius, Konrad (2017). Start planning your nitrogen management stratetgy for fall-planted wheat now (and consider using an N-rich reference strip to manage your N more precisely).M. Lundy. Sacarmento Valley Field Crops Blog, UC ANR. August 24, 2017. http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=24986
• Mathesius, Konrad (2017). Start-to-finish Agricultural Drone Workshop September 28th and 29th in Davis. Sacarmento Valley Field Crops Blog, UC ANR. July 31, 2017. http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=24796
• Long, Rachael (2016). Sample Costs for Baby LIma Beans- Sacramento Valley and San Joaquin Valley- North. Cost and Return Studies.U. Resources. UC Davis, UC Davis Agriculture and Resource Economics. https://coststudyfiles.ucdavis.edu/uploads/cs_public/06/67/0667b37a-6045-49ae-96b0-bc8700451f13/2016babylimabeansjvfinaldraftaug15.pdf
• Long, Rachael (2016). Sample Costs for Large Lima Beans- Sacramento Valley and San Joaquin Valley- North. Cost and Return Studies.U. Resources. UC Davis, UC Davis Agriculture and Resource Economics. https://coststudyfiles.ucdavis.edu/uploads/cs_public/06/67/0667b37a-6045-49ae-96b0-bc8700451f13/2016babylimabeansjvfinaldraftaug15.pdf
• Mathesius, Konrad Michelle Leinfelder-Miles (2016). Sample Costs to Produce Wheat, Sacramento Valley-Irrigated. Cost and Return Studies.U. Resources. UC Davis, UC Davis Agriculture and Resource Economics. https://coststudyfiles.ucdavis.edu/uploads/cs_public/dc/15/dc158210-055c-494c-9c2f-54083fbf0323/2016wheatsacvalleyfinaldraft122116.pdf

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