unlamm – Livestock and Poultry Environmental Learning Community

Purpose

In the spring of 2021, Rick Koelsch and Leslie Johnson shared these activities with a number of educators across the U.S. and encouraged them to download electronic copies of all resources, which were adaptable for their state, in order to begin sharing a highly interactive and peer-to-peer educational experience. This workshop will continue that education. This workshop will again share the original curriculum for teaching animal manure management and will highlight adaptations of the exercise for teaching similar concepts to the same and different audiences. Part of the workshop will be a train-the-trainer on how to use the original mapping exercise. Additionally, participants will preview variations on the exercise that have been developed for different audiences including crop producers that may not have their own livestock and women in agriculture. Finally, we’ll brainstorm other ideas and plant the seeds of development for future similar curriculum development and adaptation.

What Did We Do?

An educational curriculum was pilot tested in 2020 by Extension professionals in Nebraska and Minnesota. The curriculum includes a 25-square mile map, scenarios set up for six animal feeding operations (you pick one for your group), four fields for land application with simplified information cards, worksheets, and one-page information sheets for each of the six scenarios. These activities often lead to lots of peer-to-peer teaching. As participants work through these discussions, they add their happy and sad face emojis to the map to weigh the benefits and concerns connected to individual fields. The curriculum has been utilized across the state of Nebraska with livestock producers, and in Minnesota with custom manure applicators, livestock producers, and county feedlot officers.

In Michigan, an adaptation was developed with scenarios for three locations looking at the environmental, economically, and social aspects of manure and fertility management. Then, with the help of farm business educators, the scenarios were integrated with a new tool developed to look at the costs of different fertility programs to determine what is best for participant farms.

Minnesota took the activity and made digital versions of the game pieces to be used in an online activity. They utilized Jamboard and breakout rooms in Zoom to work through the scenarios.

In Nebraska, the water quality scenario part of the curriculum has been updated slightly to include water quality concerns not only about manure, but also about commercial fertilizer and nitrogen leaching. This was done as part of an adaptation for use in Nitrogen Management Trainings that are hosted by various Natural Resource Districts (NRDs). Other scenarios were developed to teach how to calculate a realistic yield goal and various nitrogen credits that should be considered when determining a nitrogen fertilizer rate.

Another variation in Nebraska took the manure credits exercise from the nitrogen management variation and reworked it for teaching how to determine a manure application rate on both a nitrogen and phosphorus basis to learners that had not previously utilized manure as a fertilizer, but rather were primarily spreading manure to dispose of it.

What Have We Learned?

Since beginning use of the mapping exercise, participant discussion throughout our annual land application training program has increased dramatically. This increased their satisfaction with the program as well. Because the mapping exercise requires active participation in the program, very few trainees feel comfortable sitting back to passively learn the materials, but rather they are discussing with their neighbor and attempting the exercises. Most notably, participants are usually surprised when we get through the exercise and they have completed their training. They’re busy working and forget to watch the clock, which is a wonderful complement to the program. Evaluations at the end of the program indicate that the favorite part of the program is the interactive map, group work and discussions and the ability to “visualize and understand nutrient application”.

While we expected there to be a need to have a facilitator at each table initially, experience has shown that a facilitator can handle multiple tables. Facilitators are helpful to keep participant discussions on-track and progressing through the exercise, often needing to point out instructions within the exercise. Room setup matters as does the size of the group. To make this curriculum work, large round tables with up to 8-10 participants are ideal, but 2 rectangular tables pushed together can work well too. Smaller groups work better but the nitrogen management variation has been used successfully with up to 85 participants at a time, surrounding multiple maps.

Future Plans

Continued updating of the curriculum and additional scenarios will be necessary as land application training for Nebraska livestock producers is required every 5 years, and the Nebraska Extension manure team attempts to not do the same program for the same audience more than once. This workshop will hopefully lead to future collaborations and ideas for additional or modified scenarios.

Authors

Presenting authors

- Leslie Johnson, Animal Manure Management Extension Educator, University of Nebraska – Lincoln
- Todd Whitney, Water & Cropping Systems Extension Educator, University of Nebraska – Lincoln
- Sarah Fronczak, Environmental Management Educator, Michigan State University

Corresponding author

Leslie Johnson, Animal Manure Management Extension Educator, University of Nebraska – Lincoln

Corresponding author email address

leslie.johnson@unl.edu

Additional authors

- Aaron Nygren, Water & Cropping Systems Extension Educator, University of Nebraska – Lincoln
- Chryseis Modderman, Assistant Extension Professor, Center for Agriculture, Food and Natural Resources, University of Minnesota
- Michael Sindelar, Water & Cropping Systems Extension Educator, University of Nebraska – Lincoln

Additional Information

- https://lpelc.org/selecting-preferred-land-application-sites-extension-curricula-for-interactive-land-application-education/

Acknowledgements

The original mapping exercise was developed in partnership with Nutrient Advisors, Ward Laboratories, Settje Agri-Services, and University of Minnesota Extension with funding from the North American Manure Expo and the North Central Region Water Network. Partners for the development of nitrogen management variations included the Lower Platte North and Upper Big Blue NRD.

The authors are solely responsible for the content of these proceedings. The technical information does not necessarily reflect the official position of the sponsoring agencies or institutions represented by planning committee members, and inclusion and distribution herein does not constitute an endorsement of views expressed by the same. Printed materials included herein are not refereed publications. Citations should appear as follows. EXAMPLE: Authors. 2022. Title of presentation. Waste to Worth. Oregon, OH. April 18-22, 2022. URL of this page. Accessed on: today’s date.

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Purpose

In Nebraska alone, nearly 400 earthen manure storage structures are in operation; approximately four dozen requests to cease operation of permitted lagoons were received by the Nebraska Department of Environmental Quality in the prior decade with many more non-permitted storage structures being in need of proper closure. Abandoned livestock lagoons, earthen manure storage basins, and other manure storages (e.g. concrete pits) need to be decommissioned in a manner that controls potential environmental risk and makes economical use of accumulated nutrients. Currently, limited guidance is available to support lagoon closure planning and implementation and few professionals who support livestock producers have experience planning or participating in the manure storage closure process. The main focus of this project was to produce two videos that document the processes for planning and executing a lagoon closure.

What did we do?

The University of Nebraska Haskell Ag Laboratory, located near Concord, NE, had an anaerobic lagoon that was operated for over 20 years, but has not received swine manure additions since 2009 when the swine unit was depopulated. The decommissioning of this storage structure was proposed in 2014 and provided our team an opportunity to plan, implement and document the procedures necessary to properly close this structure. When we went to find material on how to accomplish this properly, we did not find suitable material. Two grants were secured in 2016 from the U.S. Pork Center of Excellence (USPCE) to fund our team efforts to document the closure process – from planning to completion – with two separate videos. The first video is focused on the planning activities necessary to prepare for removal and utilization of stored liquid and sludge. The second is focused on the liquid and sludge removal and utilization activities, decommissioning of conveyance structures, and deconstruction of the lagoon berm to return the site to a natural grade.

Activities conducted to execute the lagoon closure have included:

1) Mapping of sludge levels with sonar and analyzing sludge samples to estimate volume and nutrient content of sludge, which enabled development of a land application plan for utilizing the products

Figure 1. Sonar sludge mapping

Figure 1. Sonar sludge mapping.

2) De-watering the lagoon (effluent used for sprinkler irrigation and flood irrigation)

3) Hosting a demonstration event during which participants:

a. observed sludge removal and land application processes,

b. participated in a manure spreader calibration,

c. inspected the soil beneath the lagoon liner,

d. viewed the abandoned production buildings and heard about options for eliminating conveyance of liquid from the building to the lagoon,

e. explored alternative sludge removal methods, and

f. participated in a classroom session where presenters shared details of the closure planning process, cost-share opportunities for closure of manure storage structures, and expectations for re-grading and re-seeding the site following removal of sludge.

Figure 2. Participants learned about planning land application of the sludge

Figure 2. Participants learned about planning land application of the sludge.

Figure 3. Land application of the sludge and calibration of the manure spreader

Figure 3. Land application of the sludge and calibration of the manure spreader.

4) Removing the sludge and applying it to cropland following the demonstration event.

Documentation of all planning, demonstration, and closure execution activities have been captured via extensive video footage, still photos, and participant interviews. Production of the videos is in process with completion and release of videos anticipated in summer 2017.

What have we learned?

Although every manure storage closure process is expected to present its own unique challenges and opportunities for learning, the process documented during this project has provided a number of insights:

1) While this process involved pumping liquid from the lagoon prior to attempting sludge removal in order to observe the sludge layer and document the volume present, a more appropriate, and likely more effective, process is to agitate the storage prior to and during pumping activities to enable handling all of the material as a slurry;

2) Dewatered sludge volume (nearly 200,000 gallons) and nutrient content (44.2 lbs. TKN, 37.5 lbs. organic N, 89.3 lbs. P2O5 and 7.6 lbs. K2O per 1,000 gallons) for this system yielded enough nutrients to apply to 80-100 acres, based on a phosphorus removal rate. It is unknown what the release of the organic N component of the sludge will be, but using just the phosphorus content, application of 1000 gallons per acre would provide enough phosphorus for what would be removed from 220 bushels of corn, which is worth approximately $35 with winter 2017 prices.;

3) Given the high phosphorus content in the sludge and that the nearby fields at the Haskell Ag Lab were not in need of phosphorus, an appropriate application rate for the sludge was determined as 8-10 tons/acre;

4) Soil beneath the lagoon liner yielded a phosphorus concentration of 556 ppm, likely a result of an inadequate liner in the lagoon as originally constructed in the 1960s; and

5) Installation of a bentonite clay liner during renovation of the structure in 1992 appeared to be effective as the liner was fully intact when observed during closure activities.

Pre-post surveys completed by 33 attendees of the demonstration event revealed that attendees improved their confidence in performing six key tasks identified by the team as being impactful. Results are summarized in Figure 4.

Figure 4. Impacts of the lagoon closure demonstration event

Figure 4. Impacts of the lagoon closure demonstration event.

Future Plans

We plan to continue the decommissioning process by:

1) Completing sludge removal and application to cropland;

2) Deconstructing the berms, leaving the liner intact, and returning the area to natural grade;

3) Seeding the area to establish ground cover and mitigate runoff and erosion; and

4) Plugging the inlet pipes in manure pits within the animal housing in lieu of removing buried conveyance pipes.

The two videos are in production and will be made available through the Pork Information Gateway (www.porkgateway.org) during summer 2017.

Corresponding author, title, and affiliation

Leslie Johnson, Research Technologist, University of Nebraska – Lincoln

Corresponding author email

ljohnson13@unl.edu

Other authors

Charles Shapiro and Amy Schmidt, University of Nebraska – Lincoln

Additional information

https://water.unl.edu/article/animal-manure-management/lagoon-closure-and-your-environmental-responsibility

Acknowledgements

The authors would like to recognize the U.S. Pork Center of Excellence (USPCE) for funding the development of the videos documenting this process and enabling us to complete this project. We would also like to acknowledge that without the support of the industry, who provided equipment and advice, we would not have been able to get this project off the ground. Also a special thanks to the Agricultural Research Division for their support.