Quad County Crops Newsletter
March 2026
Greetings, Growers–
It’s officially March, which means it’s almost April, which means it’s almost planting season! The back-and-forth between warm and cold weather has me itching for spring. I'm looking forward to warmer temperatures and a little bit of green in the fields. If you planted an overwintering cover crop but haven’t decided on a termination plan yet, I have a short article just for you.
While the busiest time of year for Extension programming is winding down, there are still some new programs coming up. Catch one of the last Strategic Farming webinars before summer, or meet Extension educators, farmers, professionals, and researchers at one of the Organic Crops Days. If you or someone you know is in their first 10 years of farming and looking for some capital to purchase farm equipment, send them a link to the Beginning Farmer Equipment and Infrastructure Grant from the MDA.
Happy growing,
Jackie Estrem
Cropping Systems Educator
Stearns, Benton, Morrison, and Sherburne Counties
estre060@umn.edu | 763-515-1023
Crops Spotlight
Cover Crop Termination Tools
Probably the most critical practice for successfully growing cover crops is termination. Timely termination optimizes cover crop performance, minimizes pest greenbridging risk, and prevents your cover crop from becoming a weed. Generally, cover crop biomass and benefits are increased when crops have more time to grow in the spring, but this should be weighed against the risks of terminating too late. The Midwest Cover Crops Council recommends termination of cover crops as early as possible to allow for back-up options and minimize the risk of challenges in the cash crop. Cover crop termination can occur anytime, but depending on your termination strategy and the needs of your operation, it is often around 2 weeks before planting, at planting, or after planting.
The easiest, or perhaps most reliable, way to terminate a cover crop is with herbicide. If you have experience with chemical herbicides, you likely understand that there are many factors that influence herbicide efficacy. Herbicides are most effective when plants are still small and actively growing. If herbicide is not suitably effective after the first application, a second application may be needed to manage the remaining cover crop. One of the advantages of herbicide is that the grower has more freedom to influence termination timing compared to other methods. Make sure to use a product that is compatible with your cash crop and follow the label instructions.
Winter-kill is the lowest-input termination option. If this is your strategy, make sure to pick annual cover crops that are known to winter-kill in your area. In Minnesota, some popular species for this system are radishes, oats, and certain clovers, but there are many options out there. Depending on fall conditions, winter temperatures, and snow cover, some crops intended to winter-kill may survive or fail to germinate until spring. A back-up termination event in the spring, which can be any of the other options listed, will manage this issue.
There are a few mechanical control methods that can be used to terminate cover crops. Tillage can be implemented on its own or in combination with other methods. A depth of 3-4” should be sufficient to cut plants from their roots and bury them. Vertical tillage tools will be less effective than perhaps a cultivator or disk, so they might require a second pass.
If you’re willing to wait for your overwintered cover crop to flower, roller crimping or mowing can be your termination method. With either method, it’s critical that your cover crop begins to flower but does not set seed. Often, waiting for cover crop flowering results in late-May or early-June cash crop planting, which may be undesirable in some cropping systems. The image to the right is of a cereal rye head at anthesis. You can see a yellow anther covered in pollen hanging from the flower. Anthesis is the best time to mow or roller-crimp cereal rye.
Looking Ahead
Strategic Farming: Let's Talk Crops!
Join us 9 to 10 a.m. on Wednesdays, now through March 25th for up-to-date, research-based information in an informal webinar format; please bring questions. The live Zoom sessions can be accessed from almost anywhere, and if you miss any, a recording will be posted online. Register for Strategic Farming once, and you'll have access to all of the sessions. Previous Strategic Farming recordings can be found here.
Minnesota Irrigator Program
March 10th and 11th | 8:30 am to 3:30 pm | The Cactus Event Center, Perham, MN
The Minnesota Irrigator Program offers advanced training to help irrigators maximize their water use efficiency. Topics include, irrigation scheduling and water management, soil and water relationships, irrigation systems and equipment maintenance, and precision and variable rate irrigation. Attendees of the recent program in Becker most valued what they learned about new technologies, such as VRI, and research-based resources to inform irrigation management. Cost is $60 for both days and includes light breakfast and lunch. Register at z.umn.edu/MIP2026.
Multi-Generational Farm Transition Retreat
March 13th and 14th | St. Cloud Technical & Community College
The Farm Transition and Estate Planning workshops and retreats are designed to help farm families build a clear path toward farm business succession, retirement and estate planning, and farm and property transition. These events provide practical tools, discussions, and expert advice on topics like business structure, tax implications, and estate planning. Join us to gain clarity, confidence, and a roadmap for your farm’s future.
Midwest Soybean Gall Midge Research Update
Thursday, March 19th, 2026 | 9:00 am to 11:00 am | Webinar
Join Extension entomologists and their graduate students from three Midwestern universities to get the latest updates on soybean gall midge (SGM). This free, live webinar will feature new research results and emerging management insights from ongoing field and laboratory studies across the region. Get the latest research-based updates on biology, ecology, and management, including:
- Updated information on SGM distribution and regional monitoring efforts
- Impacts on soybean production and yield loss under field conditions
- Biology and ecology updates, including cold tolerance and overwintering survival
- New insights into adult biology, including emergence timing and behavior
- Results from commercial soybean variety testing under SGM pressure
- Updates on biological control efforts
- Evaluation of new and emerging cultural control strategies, along with other management tools
Learn more and register on the Soybean Gall Midge Webinar webpage.
Get Involved
Cover Crop Academy
Register now for the University of Minnesota Cover Crop Academy! This innovative program is a year-long, hybrid course offered at three statewide locations for those who work with farmers. The academy kicks off with a meeting at Lamberton, Waseca, or Westport (attend one of your choice) to visit cover crop research plots and develop a trial at that location. Every other month, there’s an online, cover crop dive deep, and in May 2027, the program concludes with a visit to your designated trial site.
Beginning Farmer Equipment and Infrastructure Grant
Applications are due by 4 p.m. Central Time (CT) on Thursday, March 26, 2026.
The intent of the Beginning Farmer Equipment and Infrastructure Grant program is to support new farmers in Minnesota to access equipment and develop infrastructure that will be crucial to the future of their farm business. Through this grant, beginning farmers could pay for;
- Agriculture-specific equipment needed to grow crops, raise livestock or store the related farm products
- Farm infrastructure investments related to water access; irrigation; fencing; electricity; walk-in coolers; livestock handling; grain storage; production-related structures such as barns, livestock buildings, and greenhouses; and other farm infrastructure.
Applicants must have started farming in the past 10 years, be the principal operator of the farm, have some farming experience, farm within the State of Minnesota, be in good standing with the State of Minnesota, and have not received the grant previously.
Check out the MDA website to learn more about the Beginning Farmer Equipment and Infrastructure Grant.
Resource Reminders
Irrigation Management Assistant Tool
The Irrigation Management Assistant (IMA) uses daily estimates of crop water use, local precipitation data, and soil characteristics to track available soil moisture in your fields. You can register multiple fields, draw their boundaries on the map, and set crop, planting date, and irrigation details. The app continuously updates soil moisture balances and growth stage estimates, and provides clear visual charts and tables for irrigation, rainfall, and crop maturity. Regardless of your current irrigation scheduling method, IMA is a free and anonymous tool that can help improve the accuracy and ease of your irrigation records.
External Happenings
Bonus Events
News Highlights
Improving waterhemp control by managing spray water pH
How often do you check the pH of your spray water before mixing? Many factors are influential in the efficacy of herbicide applications, but pH might be too often overlooked. In a recent Minnesota study, spray water with a pH of 5.8 outperformed the same product applied with spray water at a pH of 7.5 in the short- and long-term. By lowering and buffering spray water pH, more herbicide can readily pass through the leaf surface and into the plant. If waterhemp control has been inconsistent on your farm, spray water chemistry may be part of the issue.
Is sulfur a mobile nutrient?
Corn, alfalfa, and canola are three crops that tend to benefit most from sulfur application. In long-term trials in Minnesota, 10 lbs of sulfate per acre was sufficient for the first and second year of continuous corn. While sulfur has some similarities to nitrate, it doesn’t leach as quickly in medium and fine soils. Soybeans did well with 20 lbs per acre applied to the previous corn crop. Sulfur applied to soybeans directly was rarely cost-effective. Another interesting note is that elemental and bentonite sulfur must oxidize to become plant-available, so incorporation should be avoided for two weeks after application.
Over-the-top dicamba use registered for 2026 on soybeans
Over-the-top dicamba use returns to Minnesota for the 2026 season. New mitigation measures are required for use to reduce drift, minimize volatility, and protect the environment. There are also state-specific restrictions in place for OTT applications of dicamba in Minnesota. If you are planning to use one of the restricted-use dicamba products, licensed applicators must complete annual training specific to OTT dicamba use offered by dicamba registrants, which keeps users informed of label requirements, best practices, and environmental protection guidelines.
Quick Calendar
March 10th - Organic Crops Day - Clearwater
March 11th - Strategic Farming: Strategies for Winning the War against Waterhemp
March 13th & 14th - Multi-Generational Farm Transition Retreat
March 13th & 14th - Minnesota Family Woodlands Conference
March 14th - Stearns Gardening Education Day
March 18th - NDSU/UMN Drainage Water Management Workshop
March 18th - Strategic Farming: Is your water quality hurting your weed control?
March 18th - Sheep and Goat Webinar: International Trade
March 19th - Soybean Gall Midge Research Update
March 25th - Strategic Farming: Planting the 2026 Crop with an Eye on Investment Returns
March 25th - Lunch n' Learn: The Dirt on Worms
March 28th - Morrison Spring Horticulture Day
April 14th - Agrivoltaics Webinar: Cattle and Kilowatts
April 15th - Weed 'em Out: Identify and Report Invasive Plants
May - Sign-Up for Alfalfa Scissor-Cut and Harvest Alert Email Reports
What is your favorite section of the newsletter?
Contact Us!
Jackie Estrem
Extension Educator, Cropping Systems
Email: estre060@umn.edu
Cell: 763-515-1023
Stearns County - 3301 Co Rd 138, Waite Park, MN 56387
Benton County - 531 Dewey St, Foley, MN 56329
Morrison County - 213 1st Ave SE, Little Falls, MN 56345
Sherburne County - 13880 Business Center Dr NW, Ste 100, Elk River, MN 55330
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