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PODCAST

UMN Extension Nutrient Management Podcast

University of Minnesota Extension

Welcome to University of Minnesota Extension"s Nutrient Management Podcast. Each month we bring you the latest research in nutrient management for crops and how you can incorporate the latest tips and best management practices to your farm.

science natural sciences

All Episodes

38:51

Biological soil fertility products for corn and...

UMN Extension Nutrient Management Podcast ·

2025/09/25

Dan Kaiser and Brad Carlson continue their discussion on N-fixing biostimulant products in today's episode of the Advancing Nitrogen Smart Podcast. What's the most up-to-date working definition of a crop biostimulant? On which crops are N-fixing products typically used? What is NCERA103.org, and in what ways it it a useful resource for farmers and other agricultural professionals? What are some of the different categories of nitrogen-fixing biostimulants? How should farmers be thinking

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31:32

Fall manure application: Plans, resources &...

UMN Extension Nutrient Management Podcast ·

2025/09/09

On this episode of the Nutrient Management Podcast, we talk all about fall manure application. What should be on a farmer's to-do list to prepare for fall application? What names need to be on an operation's emergency response plan, and what kind of PPE should farmers keep nearby? How much lead time does a lab need to return sample results? If a farmer plans to work with a commercial applicator, what can they do ahead of time to ensure a successful season? All of this, plus a farmer

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31:16

Bioreactors in-depth: Carbon sources, incorporation,...

UMN Extension Nutrient Management Podcast ·

2025/08/27

Today on the Advancing Nitrogen Smart Podcast we take a close-up look at bioreactors as an edge-of-field practice. How does this important tool work, and how does it help mitigate nitrate loss? What types of carbon sources have traditionally been used in a bioreactor, and what types of carbon could be used in the future? How are bioreactors incorporated in to a farmer's operation, and how are they maintained? How effective and efficient are bioreactors? What's on the horizon for the next

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35:20

2025 Fall fertilizer outlook: Management tips during...

UMN Extension Nutrient Management Podcast ·

2025/08/19

It’s that time of year again; time for the Fall Fertilizer Outlook on the Nutrient Management Podcast. Given the overall economics of crop production right now, how should farmers be approaching their fertilizer decisions this fall? What are some regional differences with respect to fertilizer management this year? There has been a renewed focus on the issue of water quality in Minnesota - how should this affect farmers’ decision-making? How many fertilizer decisions can be pushed off until

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33:22

Manure laws and regulations in MN: Feedlots, storage,...

UMN Extension Nutrient Management Podcast ·

2025/08/13

On today's Advancing Nitrogen Smart Podcast, Brad Carlson and Melissa Wilson explain aspects of Minnesota laws and regulations that manure applicators should be aware of. What are the requirements for manure testing, and how often should you do it? What are some general restrictions for manure application in Minnesota? How do buffers and setbacks help you? What kinds of documents should be incorporated into a manure management plan? What contingencies should be put into place in the case of

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37:58

How soil conditions & chemistry affect nitrogen loss

UMN Extension Nutrient Management Podcast ·

2025/07/30

Nitrogen loss is the topic today on the Advancing Nitrogen Smart podcast. Soil conditions and chemistry are factors that make nitrogen prone to loss, but how does the N loss process actually happen? What's left over in the field after that process occurs, and where does the lost nitrogen go? What do denitrification, leaching and volatilization mean? How can the 4 Rs (right rate, right source, right placement, right timing) help growers minimize risk? How do nitrification inhibitors,

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28:42

Variable rate nitrogen: What are we trying to...

UMN Extension Nutrient Management Podcast ·

2025/07/17

On this episode of Advancing Nitrogen Smart, Brad and Dan take some of the mystery out of variable rate N. What are we trying to accomplish when we use a variable rate management practice? What kinds of field conditions might benefit from VRN, and which conditions should be avoided with VRN? How might the other 3 R's (Timing, Source & Placement) play a part in rate decision making? All that and more on today's show. Guests:Brad Carlson, Extension educator (Mankato)Dan Kaiser, Extension

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33:03

Nutrient management for irrigated crops in MN: Corn,...

UMN Extension Nutrient Management Podcast ·

2025/07/15

Today on the Nutrient Management Podcast we discuss nutrient management for irrigated crops in Minnesota. How many irrigated acres are there in Minnesota? What are some of the benefits and risks of irrigation? In what ways can risks be mitigated - through timing, cover crop adoption and / or other general soil health practices? What should growers know about the latest irrigation research in Minnesota? If a farmer is considering adopting irrigation practices, what should they focus on

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27:06

Sulfur management: In-season, source, carryover,...

UMN Extension Nutrient Management Podcast ·

2025/06/24

This month's episode of the Nutrient Management Podcast is all about sulfur. Fertilizer guidelines go through changes periodically, but are there any upcoming changes to the sulfur fertilizer guidelines specifically? What does current research tell us about managing sulfur for Minnesota crops? Were there any surprising results? Should growers proactively add sulfur to crops out of caution, or is that practice unnecessary? What are some final takeaways that our panelists want Minnesota

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33:38

Manure sampling and testing: Variability, guidelines...

UMN Extension Nutrient Management Podcast ·

2025/06/18

This week on Advancing Nitrogen Smart Melissa Wilson and Brad Carlson talk about manure sampling and testing. What are some sampling guidelines to be aware of in Minnesota? How variable is nitrogen in one type of manure, and then from type to type? How could changes to a farmer's overall operation affect manure nutrient content? How should manure samples be stored? Safety is huge - what do farmers need to know about staying safe when working with manure? Oh, and how do you prevent sample

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33:43

More Maximum Return to Nitrogen (MRTN): How is this N...

UMN Extension Nutrient Management Podcast ·

2025/06/05

Today on the Advancing Nitrogen Smart podcast series, Brad and Dan tell us how the Maximum Return to Nitrogen (MRTN) approach to N rate recommendations is calculated. What does the MRTN actually measure for farmers? What's the reason the MRTN recommendations were created? What kind of / how many rate trials are used to build the dataset? Does the MRTN rate recommendation approach work well in all Minnesota regions? Brad and Dan cover this and more on today's show.Guests:Brad Carlson,

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46:30

Conducting on-farm research: Four Midwest experts...

UMN Extension Nutrient Management Podcast ·

2025/05/28

Today on the Nutrient Management Podcast we discuss on-farm research. On-farm research has been here for decades - so what's new about it? What are management practices that might be easier to evaluate and which might be more difficult? What are the design criteria that farmers need to have in place in order to be successful? What kinds of problems have the panelists encountered while conducting on-farm research, and how might those problems have been avoided? How can farmers participate in

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38:03

Accounting for soil and weather conditions: Methods...

UMN Extension Nutrient Management Podcast ·

2025/05/14

On this episode of Advancing Nitrogen Smart we discuss methods and tools to account for soil and weather conditions as you execute your nitrogen management strategy. Which tissue and nitrate testing options are the most beneficial, and when should you test? How does understanding the nitrogen cycle help you interpret these results? How do drought and /or saturated conditions affect available nitrogen? What can be reasonably achieved with rescue treatments? Why is it important to end your

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39:49

Why understanding the nitrogen cycle is key to...

UMN Extension Nutrient Management Podcast ·

2025/04/29

Today on Advancing Nitrogen Smart we’re talking about the nitrogen cycle and managing soil fertility. What does 'the nitrogen cycle' mean, and how does it affect your management strategy? In what ways do temperature and moisture slow down or speed up nitrogen's window of usability? What are nitrification, denitrification, volatilization, mineralization and immobilization? How well do inhibitors work, when should they be applied? How does organic matter affect the nitrogen cycle? All these

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33:22

Cation exchange capacity & nutrient management: What...

UMN Extension Nutrient Management Podcast ·

2025/04/22

Cation exchange capacity and cation balancing are the topics of the day in this episode of the Nutrient Management Podcast. What are the definitions of cation exchange capacity and cation balancing? How is CEC measured, and are those estimates reliable? What does the research say about CEC and CB and their role in a nutrient management strategy? What should farmers remember about cation exchange capacity and cation balancing for their own operations?Guests:Fabian Fernandez, Extension

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28:06

Nitrogen fertilizer management & surface water:...

UMN Extension Nutrient Management Podcast ·

2025/04/03

Today on the Advancing Nitrogen Smart Podcast we discuss nitrogen fertilizer management and surface water issues. When did we first become aware of nitrates appearing in surface water? What are some of the effects, and who is being affected? What are Minnesota's current nitrate-reduction strategy benchmarks - and are we on target to meet them? What are some of the challenges and success stories Minnesotans should know about? Which organizations can I contact if I'd like to become more

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34:26

2025 Spring Fertilizer Outlook: What should MN...

UMN Extension Nutrient Management Podcast ·

2025/03/25

It's the end of March, which means it's time for the annual Spring Fertilizer Outlook. What are field conditions like throughout Minnesota? What early fertilizer application options might MN growers want to consider? Which early fertilizer application practices might MN growers want to avoid, and why? What are growers excited - or hesitant - about? What about N carryover credits in this more typical season? Our four panelists weigh in.Guests:Fabian Fernandez, Extension nutrient management

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23:33

Nitrogen management & groundwater: What to know

UMN Extension Nutrient Management Podcast ·

2025/03/12

A lot of the conversation about nitrogen management centers around environmental issues, and in particular, nitrate levels in groundwater and surface water in Minnesota. Today we’ll discuss N management and nitrate levels in groundwater. What are some effects of elevated nitrate levels in both infants and adults? When were elevated levels first discovered in Minnesota? How do different soil types factor into nitrogen loss to goundwater? What's being done to address this issue at state,

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26:32

Nutrient management & cover crops: A research update...

UMN Extension Nutrient Management Podcast ·

2025/02/26

Today we talk with four panelists throughout Minnesota about nutrient management and cover crops. What are some results of new research looking into incorporating covers into a nutrient management strategy? What are some of the specific rotations being measured, and why? What do farmers need to know about new manure management regulations and cover crops? How much of MN has incorporated covers? This and more on today's episode.Guests:Lindsay Pease, Extension nutrient and water management

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22:07

Nitrogen-fixing biologicals: What farmers should know

UMN Extension Nutrient Management Podcast ·

2025/02/19

Today we’re talking all about nitrogen-fixing biologicals. What's the best definition of a biological or biostimulant? Are they fertilizers, pesticides - or neither? In what ways do they interact with nitrogen in the field? Where and how are biological products tested? Which environmental factors might impact biologicals? How should they be properly transported and stored? How can farmers assess whether biostimulants might be right for their operation? All this and more on today's

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