AGVISE Soil Fertility Seminars
Each year, the AGVISE Soil Fertility Seminars bring together farmers, crop consultants, agribusiness retailers, and researchers to share the latest in soil fertility, plant nutrition, and other agronomic issues that challenge our region. The seminars include a full day of invited speakers, lunch, and printed presentation guide. The United States and Canada seminars are held each January and March, respectively. This is not an event you will want to miss!
Upcoming Seminar Information
USA Seminar Series
- January 6, 2026: Willmar, MN – Willmar Conference Center
- January 7, 2026: Watertown, SD – Watertown Event Center
- January 8, 2026: Grand Forks, ND – Alerus Center
The USA seminars are now complete. The presentation slides are archived below.
Canada Seminar Series
- March 3, 2026: Portage la Prairie, MB – CanadInns Destination Centre
- March 5, 2026: Saskatoon, SK – Saskatoon Inn and Conference Center
Click here for Canada Seminar Agenda and Registration Form
Click here for Online Registration Link
The early registration deadline is Friday, February 13! Make sure to register early as space is limited and there is often a waiting list.
The seminar start time is 8:00 am with the welcome and opening comments; the seminar end time is 3:15 pm.
Seminar Speaker Lineup
- John Breker, AGVISE – Soil Salinity: Annual Problem, Perennial Solutions?
- Chris Holzapfel, IHARF – Applied Fertility Research Highlights: Nitrogen, Phosphorus, and Beyond
- Tom Bruulsema, 4RNP Consulting – 4R Practices, Real Outcomes
- Curtis Cavers, AAFC – Increasing Soil Organic Carbon on Eroded Hilltops: Build or Borrow?
- Don Flaten, Univ. Manitoba (retired) – Soil Testing with (Real) Intelligence: Maximizing Benefits, Minimizing Limitations
- Brent Jaenisch & Jed Grow, AGVISE – AGVISE Project Updates
2026 USA Seminar Presentations
Brad Carlson – Advancing Nitrogen Management
John Grove – Nutrient Stratification When Inversion Tillage Goes Away: What Matters and What Doesn’t
Lindsay Pease – Tile Drainage and Nutrient Loss: Are We Losing Fertilizer Down the Drain?
Lindsay Malone – Learning the Land: Early Lessons in Soil Health
Brent Jaenisch – AGVISE Demonstration Project Update (USA version)
2026 Canada Seminar Presentations
The presentation slides will be posted after the seminars have concluded.
2025 USA Seminar Presentations
Jason Clark – Soil Fertility and Soil Health Testing: Is There a Connection?
Melissa Wilson – Improving Manure Management: New Acres and New Applications
Marla Riekman – Tackling Salinity for Productive Soil Management
Humberto Blanco – Can Occasional Tillage and Cover Crops Help No-Till?
Brent Jaenisch – AGVISE Demonstration Project Update (USA version)
2025 Canada Seminar Presentations
Brent Jaenisch – Intensive Wheat Production: How to Manage Source and Sink
Stephen Crittenden – Soil Health Indicators for Prairie Cropping Systems
Lyle Cowell – Potassium for the Canadian Prairies
Rigas Karamanos – Optimizing Fertilizer Economics on the Prairie
Chantel Chizen – Wetlands in Cultivated Landscapes: Soil Carbon, Salinity, and GHGs
John Breker – AGVISE Demonstration Project Update (Canada version)
2024 USA Seminar Presentations
David Franzen – Sulfur Sources, Chemistry, Deficiencies, and Considerations for Application
Barney Geddes – Maximizing Nitrogen Fixation between Rhizobia and Legume Crops
Jodi DeJong-Hughes – Soil Erosion: What is Tillage Costing You?
Fabian Fernandez – Managing Soil Fertility in Strip-Till Fields for Corn and Soybean Production
Brent Jaenisch – AGVISE Demonstration Project Update (USA version)
2024 Canada Seminar Presentations
Mario Tenuta – Soybean Cyst Nematode Here in Manitoba
Mario Tenuta – Update on 4R Nitrogen Studies: Rate, Source, Placement, Timing
Jeff Schoenau – Improving Soil Health, Productivity, and Fertility on Prairie Soils
Sarah Lovas – Precision Soil Sampling: Who Grids, Who Zones, Who Cares?
Don Flaten – Predicting Crop Response to Fertilizer, Not as Simple as Some People Think
Phillip Harder – Managing Crop-Soil-Water Interactions on the Canadian Prairies
Brent Jaenisch – AGVISE Demonstration Project Update (CAN version)
2023 USA Seminar Presentations
John Breker – Soil Test Correlation and Calibration: What Does That Actually Mean? (USA version)
Daniel Kaiser – Sulfur: More than Rate and Timing, Choose the Right Source Too
David Lobb – Soil Erosion and Soil Fertility: Myths and Realities
Brent Jaenisch – AGVISE Demonstration Project Update
John Jones – Phosphorus and Potassium: A Fresh Look with Fresh Data
Jodi Boe – Soils, Pesticides, and pH: Interactions and Management
2023 Canada Seminar Presentations
John Breker – Soil Test Correlation and Calibration: What Does That Actually Mean? (Canada version)
David Franzen – Biologicals in Nitrogen Nutrition: What an Agri-Professional Should Know
Rigas Karamanos – The Good, the Bad, and the Ugly of Soil and Crop Amendments
Brent Jaenisch – AGVISE Project Updates
Marla Riekman – Soil Erosion: Don’t Just Stop It, Fix It!
Jodi Boe – Soils, Pesticides, and pH: Interactions and Management
2022 USA Seminar Presentations
Jodi Boe – Soil Amendments, Soil pH, and %K Saturation
R. Jay Goos – Soybean Iron Deficiency Chlorosis – Symptoms, Causes and Control
R. Jay Goos – Nitrogen Fertilizer Additives: The Domino Theory
Josh McGrath – How to Decide a Nitrogen Rate: Empirical, Mechanistic, or Faith-based?
Brent Jaenisch – Project Update: Soybean Cyst Nematode (SCN) Resistance
John Heard – Crop Nutrient Uptake and Removal – Are all regions the same?
John Breker – Managing Nitrogen after Drought
John Breker – Quantifying Soil Carbon – A Field and Laboratory Perspective
2022 Canada Seminar Presentations
Jodi Boe – AGVISE Demonstration Project Update: Soil Amendments, To add or not to add?
Jodi Boe – Soybean Cyst Nematode (SCN) in Manitoba and SCN Resistance Management
Chris Holzapfel – 4R Nutrient Management Trials: How do we choose the right Rs?
Rigas Karamanos – Contemporary Soil Fertility Issues
John Heard – Crop Nutrient Uptake and Removal: Are all regions the same?
John Breker – Managing Nitrogen after Drought 2021
John Breker – Quantifying Soil Carbon: A field and laboratory perspective
2020 USA Seminar Presentations
Brian Arnall – Moving from Accurate to Precise
John Breker – Soil health testing: Can you manage what you measure?
Tom DeSutter – Dispersed attitudes: I’m tiling this country and you can’t stop me!
John Lee – AGVISE Project Update
Jeffrey Vetsch – Nitrogen Management: Balancing Production, Profitability, and Water Quality
Melissa Wilson – Manure Happens: Take credit and cover it up
2020 Canada Seminar Presentations
The 2020 Canada Seminar was cancelled due to the COVID-19 Pandemic.
2019 USA Seminar Presentations
Caley Gasch – Soil Aggregate Stability: Tillage, Rotations, and Cover Crop Effects
Heidi Peterson – Phosphorus Management Challenges Confronting the Midwest
Jochum Wiersma – Wheat: How Much Appetite for Risk (and Reward) Do You Have?
John Lee – 24″ Soil Sampling Equipment & Sample Quality – Soil Probes, Tips and Tricks (Cheats)
2019 Canada Seminar Presentations
Don Flaten – Review of 4R P Fertilizer Management in the Northern Great Plains
Jeff Schoenau – Update on Micronutrient Deficiencies and Responses in Prairie Soils
Adam Gurr – Controlled Traffic Farming, On-farm Research and Our New P Management Program
John Breker – Troubleshooting Problem Areas: Plant Tissue and Soil Analysis
John Lee – Soil Probes, Tips and Tricks (Cheats)
Amy Mangin – Managing Lodging Risk Through Agronomic Management
Les Henry – Fertility of Sask. Soils: From Plough to Now
Megan Bourns – Soybean Response to Potassium Fertility and Fertilization in MB
Cory Willness – Zone Creation with Soil, Water, and Topography Maps
2018 USA Seminar Presentations
Aaron Daigh – Soil: Effects of Warming, Drying, Compaction and Microbes on Yield
Dan Kaiser – Sulfur Use in Western MN, What We Know and What We Don’t
Don Flaten – Phosphorus Management: Questions of Balance
Jerome Lensing – Discover Farms Minnesota: N and P, What is Happening in Farm Fields
John Breker – Potassium for Corn: Soil Test K and Yield Inconsistencies
2018 Canada Seminar Presentations
Amy Mangin – 4R N Management for High Yielding Spring Wheat
Don Flaten – Estimating the Nitrogen Supplying Power of Manitoba Soils
John Breker – Managing IDC with Soil Testing
John Lee – Manitoba Nutrient Trends
Lanny Gardiner – 4R N Fertilizer Management for Corn
Mario Tenuta – Soybean Cyst Nematode: Coming to a Field Near You?
Megan Bourns – Soybean Response to Potassium Fertility and Fertilizer in MB
Steve Crittenden – A Soil Quality Story from the Netherlands
Rigas Karamanos – Beyond N and P Eight Years Later: What’s Changed?
2017 USA Seminar Presentations
Bob Deutsch – History of AGVISE Laboratories
Bob Deutsch – Soil Health – Haney Test
Fabian Fernandez – Precision Testing for Corn
George Rehm – 4R and Water Quality
Greg Endres – CREC Corn Fertilizer Summary
Greg Endres – CREC Dry Bean Fertilizer Summary
Greg Endres – CREC Soybean Fertilizer Summary
Hans Kandel – Raised Beds for Soybeans
John Lee – P & K Movement in Soil
John Lee – Sodic Soil Water Flow with Gypsum and Lime
2017 Canada Seminar Presentations
John Breker – Potassium for Corn
Don Flaten – Intro to Wheat Nitrogen Fertilization
John Heard – Nitrogen Fertilization for Corn
Rigas Karamanos – Post Emergent Fertilization
John Lee – History of AGVISE Laboratories
John Lee – IDC Soybean Demonstration Project
John Lee – P & K Movement in Soil
John Lee – Sodic Soil Water Movement
John Lee – Soil Health Haney Test
Amy Mangin – N Recommendation for New Wheat Varieties
Magda Rogalsky – P, ZN, and N Fertilization for Corn
Mario Tenuta – Managing N Fertilizers to Reduce Nitrous Oxide Emissions
2016 USA Seminar Presentations
2016 Canada Seminar Presentations
Don Flaten – P Fertility Mgmt in Manitoba
John Heard – N Management for High Yield and High Protein Spring Wheat
John Lee – Sampling Fertilized Soybean Fields
John Lee – Sodic Soil Presentation
Mario Tenuta – SCN Mangement in Manitoba
Sarah Lovas – FeEDDHA Working in the Real World
Sarah Lovas – The Exciting World of Chelation
Rigas Karamanos – Diagnosing and Correcting P & K Deficiency
2015 Seminar Presentations
2013 Seminar Presentations
George Rehm – Discovery Farms Minnesota
Jochum Wiersma – AGVISE Crop Rotations 2013
Jodi DeJong Hughes – AGVISE Shallow Till_13
Jodi DeJong Hughes – AGVISE Water Infiltration 2013
John Lee – Drought Nutrient – Trends 88-2012
Richard Jenny – Corn Tissue Topic 2013 Final
John Lee – Tissue Demonstration Presentation – Seminar 2013