Field Days to Demonstrate Manure Distribution and Calibration

ISU Extension and Outreach summer field days to focus on making good manure application decisions

May 17, 2017, 7:42 am | Kapil Arora

Manure ApplicatorAMES, Iowa – Uniform liquid manure distribution across the application tool-bar is important for proper use of nutrients. Uniform distribution of manure across the tool-bar swath ensures minimal variability among application points. Uneven manure application, especially under low application rates, can potentially lead to uneven response in crop growth.

Iowa State University Extension and Outreach has scheduled four field days to help manure applicators better understand manure distribution, calibration and the value of manure. Flow meter calibration check is important to achieve accurate application rates in the field. Understanding the value of manure can help producers to utilize nutrients appropriately, leading to better manure management for their livestock operations.

“We want to remind producers to check their manure application equipment to make the most out of the distribution manifold (see photo) as the cost to supplement nutrients with commercial fertilizers can be expensive,” said Kapil Arora, agricultural engineering specialist with ISU Extension and Outreach.

Speakers for the Manure Distribution and Calibration field days include Dan Andersen, assistant professor and agricultural engineering specialist with ISU Extension and Outreach and coordinator of the Iowa Manure Management Action Group (IMMAG) and Arora, Greg Brenneman, Kris Kohl and Shawn Shouse, agricultural engineering specialists. ISU Extension and Outreach field agronomists Mark Johnson, Michael Witt, Joel DeJong, Paul Kassel, Meghan Anderson and Rebecca Vittetoe will also be present at the field days.

The program for each field day will begin at 11:30 a.m. with registration followed by a free lunch at noon. Presentations and demonstrations will begin at 1 p.m. and will cover manifold distribution, flow-meter verification and value of manure as fertilizer. Information on manifold distribution collected through research funded partly by the National Pork Board will also be shared.

2017 Manure Distribution and Calibration field days schedule

June 2 – Puck Custom Enterprises, 1110 100th Street, Manning, Iowa 51455
Contact: Shawn Shouse, agricultural engineering specialist, 712-769-2650 or

June 23 – ISU Allee Memorial Demonstration Farm, 2030 640th Street, Newell, IA 50568
Contact: Kris Kohl, agricultural engineering specialist, 712-732-5006 or

July 26 - Zoske’s Sales & Services Inc., 604 Greenfield Avenue, Iowa Falls, Iowa 50126
Contact: Kapil Arora, agricultural engineering specialist, 515-291-0174 or

August 4 – Eldon C. Stutsman, Inc., 350 Oakcrest Hill Rd SE, Hills, Iowa 52235
Contact: Greg Brenneman, agricultural engineering specialist, 319-337-2145 or

The program for each field day is the same and interested participants are requested to register online at to help with lunch arrangements and field day planning.

PHOTO: Check It: Careful planning goes into applying manure uniformly. Application rate, operating pressure, outlet location, and discharge hose arrangement are important operating factors that govern how uniformly a manifold distributes manure across the tool-bar points. Photo Credit: Kapil Arora

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