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Home » Authors » Daniel Andersen
Daniel Andersen

Daniel Andersen

Associate Professor of Manure Management and Water Quality / Iowa State University
Email Daniel Andersen
Articles

ARTICLES

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Cover crops and manure timing: Start with the ‘why’

Ask yourself, “What is the purpose of the cover crop in this field?” to determine the best manure strategy.
April 8, 2026
Daniel Andersen

Cover crops and manure are both tools. When they are aligned, they improve nutrient efficiency, protect water and can even add forage value. When they are not aligned, they create management friction, yield drag and frustration. 


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Sustainable bedding solutions: Exploring manure solids separation and bedding recovery for dairy farms

Using recycled manure solids takes upfront investment, consistent management and a willingness to rethink parts of your manure system, but it’s also a viable bedding solution for some farms.
September 4, 2025
Daniel Andersen

While most of us focus on how to move manure, store it and land-apply it, there's a growing interest in what else manure can do for the dairy. One of the more intriguing ideas? Turning it into bedding.


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Harnessing the power of anaerobic digesters: Opportunities and challenges for dairy farms

While federal enthusiasm for climate-smart farming has cooled, digesters remain a forward-looking opportunity. Most farms partner with experienced companies to bring digesters online, but careful communication is essential to ensure all parties benefit.
June 10, 2025
Daniel Andersen

While recent changes in policy and markets have added uncertainty to the economics of digesters, the technology remains a valuable option for dairies looking to improve sustainability, prepare for a carbon-conscious future and manage manure more effectively.


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Innovations in manure handling: Exploring in-season manure application methods

Advancements in manure application methods have the potential to transform how dairy farmers use the resource by improving nutrient use efficiency, alter labor demands and lower their carbon footprint.
February 25, 2025
Daniel Andersen

Manure can be a valuable resource or a liability, especially at dairy farms, where cows produce lots of it. For years, farms have recycled manure nutrients, turning them back into feed and forage for cows by applying them as fertilizers to support crop production. However, handling and applying manure efficiently and sustainably can be challenging.


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Advice for applying manure during winter

Utilizing best practices for winter manure application will help dairy producers get the most from their manure resources while protecting the water around them.
October 30, 2024
Daniel Andersen

As winter approaches, the challenges associated with cattle manure application become more pronounced. Adopting best practices that maximize nutrient utilization and safeguard water resources is crucial. What follows are critical considerations for cattle manure application in the winter.


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Is an anaerobic digester right for your dairy?

Installing a digester reduces the carbon footprint of the production system, reduces odors, potentially retains more manure fertilizer value and, if things work well, results in renewable fuel. Now is a great time to evaluate how a digester could fit on your dairy.
April 21, 2023
Daniel Andersen

Anaerobic digestion is seeing increased interest and implementation on many farms throughout the U.S. But what is anaerobic digestion? What do the economic opportunities look like? And, how would it fit on your farm?


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Handle manure safely to avoid the risks of hydrogen sulfide

Almost half of all manure-related gas incidences occur on dairy farms. Keep in mind safe handling practices when agitating manure to reduce the risk of hydrogen sulfide poisoning in humans and the herd.
November 23, 2022
Daniel Andersen

Since the early 1960s nearly, 150 people have died in the U.S. because of manure-related gas incidents. Of these, almost half occurred on dairy farms, with the most common activity at the time of death being conducting repairs or maintenance on manure-handling equipment or attempting to rescue another individual.


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Nutrient separation

Nutrient separation or improved hauling logistics: Which options fit your operation?

March 30, 2018
Daniel Andersen
The nutrient density of manure is one of the most important factors influencing transportation costs. As the largest part of the manure slurry is water, it is natural to consider separation and partitioning strategies that divide the slurry into different fractions.
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