Better soil data.
Better fertilizer decisions.
Soil testing, plant tissue analysis and carbon testing for American agriculture. Submit samples to our Grimes, Iowa laboratory—or let us handle your field sampling, testing and fertility recommendations.
Before you buy fertilizer,
know what your soil needs.
A previous application does not tell you what is available today. Soil nutrient testing gives you a measured starting point for your next fertility plan.
Spend where nutrients are needed
Identify low and high nutrient levels so your fertilizer plan reflects soil conditions across your fields.
Find potential crop limitations
Check nutrient availability and soil pH before they become problems you need to manage in season.
Build a record for the next season
Compare results over time to understand how your soil responds to cropping and fertility decisions.
Test the soil.
Understand the crop.
Choose the analysis that answers your question—from pre-season fertility planning to in-season crop nutrition and soil carbon measurement.
Soil Testing & Analysis
Measure soil nutrients and properties to guide fertilizer planning and understand differences across your fields.
Get soil testing pricing →
Plant Tissue Analysis
Measure crop nutrient status during the growing season to help investigate deficiencies and assess nutrient uptake.
Request tissue analysis →
Soil Carbon Testing
Get soil carbon analysis for research, sustainability initiatives and programs with specific measurement requirements.
Request carbon analysis →
Your fields. Our team.
A fertility plan you can use.
Keep your focus on harvest. We coordinate field sampling, analyze your soil and provide fertility recommendations for your acres and crops.
Request a custom quote based on your acreage and the fields you want sampled.
Sampling. Testing. Recommendations.
- We collect Field sampling coordinated for your operation.
- We analyze Complete laboratory fertility analysis.
- You plan Custom fertility recommendations and a team to answer your questions.
Take your results
through to application.
Our U.S. Turnkey Soil Testing Program brings mapping, professional sampling, analysis and agronomic recommendations together with variable-rate application files and reporting.
- GPS field mapping
- Sample-point creation
- Professional sampling
- Laboratory analysis
- Agronomic recommendations
- VRT application files
- Digital delivery
- Field books & reports
Direct analysis.
Confidence in your soil data.
Our U.S. lab performs Bray, Olsen and Mehlich testing using direct chemical analysis. Your results come from the requested method, rather than generalized conversions between methods.
Working with an agronomist or an established testing program? Tell us the method your recommendations require.
A laboratory partner
for every acre and program.
From individual farm submissions to agronomist, retailer and research programs, our team helps you choose the analysis and submission workflow your project needs.
Meet Corvian Labs →
Choose how you want
to get started.
Soil testing questions,
answered.
Do I need to collect the soil samples myself?
You can submit your own samples to our U.S. lab, or book full-service soil sampling and have collection coordinated for you. The full-service package also includes laboratory analysis and fertility recommendations.
How much does U.S. soil testing cost?
Contact our lab for pricing based on your sample type and required analysis. For full-service sampling, request a custom quote based on your acreage and the fields you want sampled.
How quickly will I receive full-service soil test results?
The fall sampling package offers soil test results in three business days once samples reach the lab. Ask our team about scheduling for collection and delivery of your complete fertility plan.
Where do I send my soil or plant tissue samples?
Our U.S. laboratory is at 200 SE 37th Street, Suite 200, Grimes, Iowa 50111. Contact the team before shipping to confirm the correct forms, sample preparation and requested analysis.
Ready to test?
Start with our U.S. team.
Get help with laboratory pricing, sample submission or a complete soil-testing program.
U.S. laboratory
200 SE 37th Street, Suite 200
Grimes, Iowa 50111
For a faster response, include your location, sample type or acreage, and desired timing.