Established in 1993, United Soils, Inc. is a full service soil testing business. United Soils has served Illinois and surrounding states for 20 years with quality and reliable analysis of growers soil fertility. We offer the full spectrum of soil testing, including Macro and Micro Nutrient analysis. All tests are performed under strict quality control that meets the standard of the Land Grant college of the University of Illinois. The United Soils lab also offers both Soybean Cyst Nematode and Corn Nematode testing along with a full season Nitrogen testing program. Plant tissue analysis was recently added to the testing program and our staff is available to discuss what tests would fit your needs. United Soils has a full crew of employees to pull samples using GPS software to map sample locations and field boundaries to complete your testing package. Three full-time Agronomists are available to discuss any questions related to your analysis and fertility program.

Our History

• Owned and operated by Dave & Sue Allen.
• Started in 1993 as a field office with two employees in a 32′ x 36′ building.
• In 1995 constructed a new lab, followed by the addition of a new shop in 1996.
• July 27, 1997 – officially became United Soils, Inc.
• The lab area has expanded three times (1996 – 2006 – 2011).
• A new main office was built in 2003, followed by a new conference room and training center in 2006.
• USI employs 30+ people year round, and also brings on seasonal help as needed.
• USI serves customers in: Illinois, Iowa, Wisconsin, Indiana, Ohio, Michigan, Missouri, Kentucky, Tennessee & Mississippi.

Soil Sampling

United Soils, Inc. understands the need for timely and accurate results, and it starts with collecting meaningful samples. Our field technicians follow strict field mapping & sample collection protocol to assure the lab receives the most representative field samples possible.

USI uses GPS mapping technology to generate field maps and their associated grid / core sample locations. Cores are collected and composited surrounding the predetermined sampling site.

Field Services

• Geo-Reference Soil Collection / Testing
• Plant / Tissue Collection / Testing
• Colored Computer Nutrient Maps
• Soybean Cyst Nematode (SCN) Testing
• Soil Sample Pick-up at Your Location
  (Click here to email a pick-up request)
• Full Season Crop Scouting
• Online Soil Test Order Placement
• Digital Plant maps & Test Results
• Lab Tests for Primary, Secondary & Micronutrients for crop production
• Consulting with Retail Ag Chemical & Fertilizer Dealers on the business side of precision agriculture

Click the links below to access Customer-Collected Sample Request documents:

1. Customer Loose Soil Sample Test Request Form – Word Doc.
2. Customer Plant Tissue Sample Submittal Form – Word Doc.
3. USI VRT Prescription Map Request Form – Word Doc.

Click the links below to access United Soils-Collected Sample Request documents:

1. United Soils Soil Sample Test Request Form – Word Doc.
2. United Soils Tissue Nitrate Sample Submittal Form – Word Doc.
3. United Soils PSNT Soil Nitrate Request Form – Word Doc.

Plant / Tissue Sampling

United Soils Inc. suggests following the provided guide below when obtaining plant tissue samples for analysis. Results of the analysis will determine whether problems in plant development are due to nutritional factors.

Precise results are possible only when carefully selected plant material is submitted for analysis. Accurate sampling requires that select parts of a plant are collected at certain stages of plant development. A plant’s nutritional condition differs for each variety, stage of development and growing area. It is recommended to select plant tissue representative of a particular variety and growing area. Place samples in un-lined paper bags.

What Not to Sample: Diseased or dead plant material; plant tissue damaged by insects and/or mechanical equipment; plant tissue which has been stressed by excesses of cold, heat or moisture; seeds should NOT be sampled as they do not reflect nutritional status of the whole plant.