UMN Extension Nutrient Management Podcast

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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24:25

Variable rate nitrogen: What farmers should know

UMN Extension Nutrient Management Podcast ·

2025/02/06

Today we’re talking all about variable rate nitrogen. What underlying information do we need to make decisions about VRN? What areas in the field might be prone to N loss? Should you only add extra N to high-yielding areas, or could a low-yielding zone also show positive responses? What effect could your overall management strategy have on a variable rate response? All this and more on today's episode.Guests:Brad Carlson, Extension educator (Mankato)Dan Kaiser, Extension nutrient management

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53:36

25 Years of nutrient management: How have practices...

UMN Extension Nutrient Management Podcast ·

2025/01/23

Here we are in 2025. Today on the Nutrient Management Podcast, our panelists talk about how the practice of nutrient management has changed over the last quarter century. How have precipitation levels - and perceptions about precipitation - changed? What came before the current Maximum Return To Nitrogen management model, and what did the change address? How has U of M research contributed to sulfur nutrient management understanding? How has awareness of ground and surface water quality

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29:17

Nitrogen conservation and water quality, Part 2:...

UMN Extension Nutrient Management Podcast ·

2025/01/22

We continue our conversation about nitrogen conservation and water quality on Advancing Nitrogen Smart. Today in Part 2, Brad Carlson and Jeff Vetsch continue discussing new technologies that may help address nitrogen loss, such as passive sensors and crop modeling systems. How might future tools such as AI play a part? How is precision testing affected by timing? In what ways can hybrid engineering, and further efficiencies in inhibitors be leveraged? This and much more on today's

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29:06

Nitrogen conservation and water quality, Part 1:...

UMN Extension Nutrient Management Podcast ·

2025/01/08

Nitrogen conservation and water quality are the subject of today's Advancing Nitrogen Smart episode. There's lots to cover so we're splitting the episode up into two parts. Today in Part 1, Brad Carlson and Jeff Vetsch unpack different conservation solutions, and what might be achieved from their adoption. In what situations might buffer strips, cover crops, and corn genetics play their part? What about using technology-such as active and passive sensors? How do any reactive mitigation

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29:38

Soybean nutrient management: IDC concerns, a research...

UMN Extension Nutrient Management Podcast ·

2024/12/19

Today on the podcast we focus on soybean nutrient management. Our four soybean and nutrient management panelists from across Minnesota and North Dakota explain their research trials, and discuss some preliminary results in the region. Also, what should growers keep in mind as we transition into 2025? What are the panelists' concerns about IDC? That and much more on our last episode of 2024. Guests:Lindsay Malone, Assistant professor, Climate Smart Approaches to Agriculture (NDSU)Lindsay

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47:50

Predicting nitrogen rates: Factors and resources for...

UMN Extension Nutrient Management Podcast ·

2024/12/04

After spending last episode talking about the background and history of nitrogen rate recommendations in Minnesota, today on episode 14 we’re talking about what to keep in mind as you begin predicting your nitrogen rate needs. How do yield, and nitrogen use efficiency (NUE) factor into decision making? Are there any N rate databases available to Minnesota growers? What are the pros and cons of a variable rate strategy, or cover crops for example? Brad and Dan talk about that and much more

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38:10

The history of N rate recommendations in Minnesota:...

UMN Extension Nutrient Management Podcast ·

2024/11/13

Today Brad and Dan explore the background and rationale behind nitrogen rate recommendations in Minnesota. How have Minnesota's N rate recommendations evolved over time? What data does the MRTN approach take into account? How are these N rates organized? Guests:Brad Carlson, Extension educator (Mankato)Daniel Kaiser, Extension nutrient management specialist (St. Paul)Additional resources:What to know about the MRTN approachAre you overspending on fertilizer?Corn Nitrogen Rate CalculatorCorn

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33:37

Nitrogen loss: Lessons learned from the 2024 growing...

UMN Extension Nutrient Management Podcast ·

2024/11/07

Nitrogen loss: Lessons learned from the 2024 growing season is the big topic on today's episode of the Nutrient Management Podcast. What N application practices looked particularly bad in 2024? Some farmers are saying they are no longer going to apply fall N based on how 2024 played out. Is this warranted, or is it an overreaction? Is there any data back from split-application trials, or evaluations of rescue treatments? What did it tell us? In hindsight, what would have been ideal

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24:40

Nitrification inhibitors in detail: Important...

UMN Extension Nutrient Management Podcast ·

2024/10/30

In episode 12 of the Advancing Nitrogen Smart series Brad and Dan talk in detail about nitrification inhibitors. What are the two types of inhibitors, and what are best practices for incorporation? How do soil type, temperature, and precipitation factor into farmer decision-making? How much time does a nitrification inhibitor buy you? In what circumstances should inhibitors be avoided altogether? These answers and many, many more on today's episode.Guests:Brad Carlson, Extension educator

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26:10

A difference in degrees: Fall application efficiency...

UMN Extension Nutrient Management Podcast ·

2024/10/16

Today we’re talking all about fall application. What's the first thing farmers should know about applying in fall? What’s the difference in N efficiency at 50 the degree threshold versus even a 55 degree threshold, and then when have those degree dates happened historically?Guests:Brad Carlson, Extension educator (Mankato)Daniel Kaiser, Extension nutrient management specialist (St. Paul)Additional resources:Minnesota Department of Agriculture Soil Temperature NetworkSouthern Research and

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39:09

Liming and pH: Timing, economics, materials, and more

UMN Extension Nutrient Management Podcast ·

2024/10/15

In this episode of the Nutrient Management Podcast, our panelists discuss liming in detail. What kind of variation is there in liming recommendations? Since pH changes aren’t instant, when is the best time to apply limestone? Is lime application economically justified, and in what circumstances? What should growers know about selecting liming materials? What other bits of advice do our panelists recommend?Guests:John Jones, Soil Fertility, plant nutrition, and nutrient management research,

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22:15

Fall manure application: Optimal strategies for...

UMN Extension Nutrient Management Podcast ·

2024/10/02

In this episode of Advancing Nitrogen Smart, Melissa Wilson, Extension manure management specialist joins Brad Carlson to discuss fall manure application. What are the most important dos and don'ts of fall application? How much time can nitrification inhibitors buy you after application? What's the optimum soil temperature for application, and what if you can't wait? What are characteristics of manure from different sources, and how can they work to your advantage? Guests:Brad Carlson,

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30:13

Your optimal N rate: Understanding its impact on...

UMN Extension Nutrient Management Podcast ·

2024/09/18

In this episode of the Advancing Nitrogen Smart series, we discuss probably the most important topic for many farmers - rate. What makes both over-application and under-application of nitrogen counter-productive in terms of yield? How does a Maximum Return To Nitrogen (MRTN) rate approach differ from a yield-based approach? What are long-term environmental consequences of over-application, and how does this relate to a farmer's operation? What are some ways to address in-field variability

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36:32

Fall Fertilizer outlook for 2024: Current conditions,...

UMN Extension Nutrient Management Podcast ·

2024/09/09

This episode of the Nutrient Management Podcast is our annual fall fertilizer outlook. After such a challenging growing season throughout most of the state, how do things look headed toward harvest? Since most of the state went from being too dry last year to too wet this year, how should this affect the approach to fertility management? What role will fertility play in sound financial management this fall? What advice do our panelists give growers as we head into the fall?Guests:Daniel

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28:00

Timing nitrogen efficiently: How to maximize yield...

UMN Extension Nutrient Management Podcast ·

2024/09/04

In the 8th episode of the Advancing Nitrogen Smart series, we’re taking about timing. What makes understanding timing crucial to using nitrogen efficiently? Should growers apply in fall, and if so, what source should be avoided? Between which growth stages does corn take up the bulk of a field's N? What do weather extremes teach us about optimal timing? Do some timing decisions negatively affect farmers' finances? In what ways?Guests:Brad Carlson, Extension educator (Mankato)Daniel Kaiser,

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