Lincoln, Nebraska

Our Lincoln, Neb., laboratory was the first accredited soil testing facility in the world and the first to introduce electronic data transfer technology. Previously called Harris Laboratories and then MDS Harris, the Lincoln facility was purchased by AgSource in 2006. Today we continue the high standard of reliable test results and superior customer service. 

Services

AgSource provides a wide range of analytical services for growers and producers, golf course superintendents, and landscape professionals in the Midwest and around the world. If you’re looking for reliable water, turf, media or agricultural testing services, look no further. We offer soil, soil health, plant tissue, manure, fertilizer and irrgiation water analyses. 

Benefits

Choose our state-of-the-art facility in Lincoln, Neb., and enjoy the following benefits of working with an industry leader:

  • Full spectrum of agricultural analysis options

  • Flexible electronic reporting options

  • Knowledgeable laboratory technicians and customer-oriented staff

Contact Information

Ready to get started with our water and agricultural testing services? Please contact our professionals in Lincoln, Nebraska 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

Chris Ibsen-AgS-web

Chris Ibsen

Director AgSource Sales
Kevin Klink-Ags-web

Kevin Klink

Manager Great Plains Laboratory
Jacob Niewohner-Ags-web

Jacob Niewohner

Sales Representative

Lincoln Testing Methods

Certifications

To ensure reliable results, we routinely evaluate our performance with internal controls, including check samples, client duplicate samples and re-analysis of archived samples. AgSource Laboratories in Lincoln maintains certifications from:

  • Soil Science Society of America (NAPT-PAP)

  • Agricultural Laboratory Proficiency Program (ALP)

  • Manure Analysis Proficiency (MAP)

When comparing results from one laboratory to the next it is important to determine the following:

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

It is important to note that there is no perfect method for determining how much or little of an essential nutrient is available for plant uptake. Availability is affected by: soil moisture, temperature, soil pH, clay/organic matter content, soil drainage, physical barriers and many other factors. As these factors change the availability of nutrients also change. What a soil test measures is the degree of fertility; be it low, medium or high.

For a printable PDF, click here.

SOIL

– All soil samples are dried and ground.

Analysis
Units
Method Description
Soil pH
N/A
1:1 Soil/Water Slurry
Soluble Salts (EC)
mmhos/cm
1:1 Soil/Water Slurry
Buffer pH
Sikora Buffer Method
Cations: Ca-Mg-K-Na
ppm
Ammonium Acetate Extraction
Phosphorus (If pH < 7.2)
ppm
Bray 1 Extraction
Phosphorus (If pH > 7.1)
ppm
Olsen Extraction
Traces: Zn-Mn-Fe-Cu
ppm
DTPA Extraction
Sulfur
ppm
Monocalcium Phosphate (ICP Determination)
Boron
ppm
Hot Water Extraction (ICP Determination)
Nitrate-Nitrogen
ppm
Cadmium Reduction
Particle Size Analysis (Sand-Slid-Clay)
%
Hydrometer Measurement
Salinity Evaluation
mmhos/cm
Saturated Paste Extraction
Other Methods Available
Pertains to country of origin
Extractable Soil Ammonium
ppm
KCI extraction
Extractable Chloride in Soil
ppm
Calcium Nitrate Extraction
Soil Moisture
%
Loss of Drying
Organic Matter
%
Loss of Ignition (LOI), expressed as OM%
Extractable Aluminum
ppm
Cesium Chloride Extraction
Extractable Molybdenum
ppm
Ammonium Oxolate

PLANT ANALYSIS

– All plant tissue samples are dired and ground.

Analysis
Units
Method Description
Nitrate-Nitrogen
ppm
2% Acetic Acid Extraction
Phosphate-Phosphorus
ppm
2% Acetic Acid Extraction
Extractable Potassium
%
2% Acetic Acid Extraction
Total Nitrogen
%
Total Kjeldahl Digestion
Total Phosphorus
%
Nitric Acid/Hydrogen Peroxide Digestion
Plant Minerals
% & ppm
Nitric Acid/Hydrogen Peroxide Digestion

GREENHOUSE MEDIA TESTING

– All samples are saturated before analysis.

Analysis
Units
Method Description
Media pH
N/A
Saturated Media Extract (SMS)
Phosphorus
ppm
Potassium
Calcium
Magnesium
Sodium
Zinc
Manganese
Copper
Iron
Boron
Aluminum
Nitrate-N
Ammonium-N
Extractable: Zinc, Manganese, Copper, Iron
ppm
DTPA Extraction
Organic Matter & Organic Carbon
%
Loss on Ignition
Total Nitrogen
%
Total Kjeldahl Digestion
Soluble P205
%
Citric Acid Extraction
Soluble K20
%
Ammonium Oxalate Extraction

Soil, plant tissue and greenhouse media test methods are described in:

  • Analytic procedures used in US EPA Report SW-846, Test Methods for Evaluating Soil Waste, 3rd Edition, November 1990, as revised.
  • Association of Official Analytical Chemists (AOAC) Official Methods of Analysis, 1990, 15th Edition.
  • Methods of Soil Analysis, Parts I, II, and III. Soil Science Society of American. 1996.
  • North Central Regional (NCR) Publication No. 221 (Revised).  Recommended Chemical Procedures for the North Central Region Bulletin No. 499 (Revised) October 1988.
  • Standard Methods for the Examination of Water and Wastewater, 18th Edition, 1992.
  • The American Society for Testing and Materials (ASTM) Standard Tests Methods, 1988.