Ellsworth, Iowa

Looking for water, environmental or agricultural testing services with quick turnaround? We are the one-stop solution for you. Clients from Davenport to Council Bluffs rely on AgSource for quality service and accurate results. Located conveniently in central Iowa, our Ellsworth laboratory allows easy access for customers in Des Moines, Kansas City, Omaha, and Minneapolis.

Services

Analyses offered include soil, soil health, plant tissue, irrigation water, manure and soybean cyst nematode testing. Water testing is also available for drinking water, wastewater and pool water.

Benefits

The AgSource team in Ellsworth is well-versed in the agricultural and environmental fields. In addition to our extensive knowledge and experience, you’ll find that it’s easy and convenient to work with us. We offer the following benefits to our customers:

  • Free sample supplies and testing kits
  • On demand pick-up route service
  • Flexible reporting options
  • Soil sample results in 3 business days
  • Manure testing results in 5 business days

Contact Information

Ready to contact us for water, environmental, or agricultural testing services? Contact Ellsworth today!

Order Testing Supplies

Do you need supplies for testing? Just let us know what you are looking to test and we will send you what you need.

Contact Us

Katie Lindaman-Ags-web

Katie Olson

Production Manager
Casey Robinson-3

Casey Robinson

Sales Representative
Nancy Solberg

Nancy Solberg

Soil Administrator

Ellsworth Testing Methods

Certifications

Following are the certifications we hold at our Ellsworth laboratory:

  • Soil Science Society of America (NAPT)
  • Agricultural Laboratory Proficiency Program (ALP)
  • Manure Analysis Proficiency (MAP)
  • Iowa Department of Natural Resources

For the best use of soil testing results, it is important to know the following:

  1. Laboratory method used for each analysis.
  2. Units reported for each analysis.
  3. Any conversion or calculation used for specific tests.

Actual nutrient availability in the soil is determined by changing factors including: soil moisture, temperature, pH, clay content, internal drainage, organic contact and physical barriers. As any of these factors change, the availability will also change.

For a printable PDF with all methods, click here.

SOIL

– All soil samples are dried and ground.

Analysis
Units
Method Description
Soil pH
1:1 Soil/Water Slurry
Buffer pH (Buffer Index)
Sikora Buffer Method
Soluble Salts (EC)
mmhos/cm
1:2 Soil/Water Slurry
Potassium
ppm
Mehlich 3 Extraction
Phosphorus
ppm
Mehlich 3 Extraction, Colorimetric
Calcium, Magnesium and Sodium
ppm
Ammonium Acetate Extraction
Sulfur
ppm
Monocalcium Phosphate Extraction
Copper, Iron, Manganese and Zinc
ppm
DTPA Extraction
Boron
ppm
Hot Water Extraction
Nitrate-Nitrogen
ppm
Cadmium Reduction
Ammonium Nitrogen
ppm
KCl Extraction
Organic Matter
%
Loss on Ignition (LOI), expressed as OM%

(By Request)

Analysis
Units
Method Description
Phosphorus, Bray 2
ppm
Bray 1 Extraction
Phosphorus, Bray 2
ppm
Bray 2 Extraction
Phosphorus, Olsen
ppm
Olsen Extraction, when soil pH >7.2
Moist Soil K (Wet K)
ppm
Moist soil slurry, Mehlich 3 Extraction

Soil test methods are described in:

  • Recommended Chemical Soil Test Procedures for the North Central Region, North Central Research Publication No. 221 (Revised), 2015, Missouri Agricultural Experiment Station SB 1001.

MANURE

– Liquid and solid samples are tested as a liquid. Dry samples are dried and ground for testing. All samples are reported “As Received”.

Analysis
Units
Method Description
Dry Matter/Moisture
%
Oven Drying at 70°C, 16 hours
Nitrogen (TKN)
%
Total Kjeldahl Digestion
Minerals: P, K, S, Ca, Mg, Na
%
Nitric Acid/Hydrogen Peroxide Digestion
Minerals: Cu, Fe, Mn, Zn
ppm
Nitric Acid/Hydrogen Peroxide Digestion
Ammonium-Nitrogen
%
KCI Extraction
Nitrate-Nitrogen
%
KCI Extraction
Organic Nitrogen
%
Calculated: (TKN – Ammonium-Nitrogen)
pH
1:2 Manure:Water Slurry, “As Received”
Electrical Conductivity (EC)
mmhos/cm
1:2 Manure:Water Slurry, “As Received”

 Manure test methods are described in:

  • Recommended Methods of Manure Analysis. 2003, University of Wisconsin Extension Publication A3769