Mehlich III Full - TCEQ / EQUIP
Full Nutrient and Salinity Profile for Regulatory & Conservation Projects
Designed for Compliance, Land Applications, and Conservation Programs
The Mehlich III Full – TCEQ / EQIP soil analysis package is tailored for use in state and federally regulated land application projects, including those under TCEQ (Texas Commission on Environmental Quality) and EQIP (Environmental Quality Incentives Program) guidelines. It provides a thorough profile of macro nutrients, soluble salts, and total vs. extractable minerals—exactly what contractors, consultants, and land managers need for permitting, reporting, or nutrient management planning.
Whether you're working on biosolid application projects, CAFO site evaluations, conservation land improvement, or NRCS cost-share programs, this package meets technical requirements for many regulatory and grant-funded applications.
What’s Included in Your Analysis
Tested using the Mehlich III strong-acid extraction method, plus key salinity and total nutrient markers:
Soil Chemistry & Salinity
- pH – Measures soil acidity or alkalinity
- Electrical Conductivity (EC) – Indicates soluble salt levels
- Sodium Adsorption Ratio (SAR) – Assesses sodium hazard to infiltration and permeability
- % Total Organic Matter – Reflects carbon content and nutrient retention potential
Nutrients (Total & Soluble)
- Nitrate-Nitrogen (N-NO₃) – Bioavailable form of nitrogen
- Total Phosphorus (P) – Required for nutrient loading calculations
- Total Potassium (K)
- Total Calcium (Ca)
- Total Magnesium (Mg)
- Total Sodium (Na)
Soluble (Plant-Available) Nutrients
- Soluble Calcium (Ca)
- Soluble Magnesium (Mg)
- Soluble Sodium (Na)
- Sulfur (as SO₄-S) – Important for salinity interpretation and crop tolerance
Who Uses This Test?
- Environmental consultants preparing TCEQ permit applications
- EQIP or NRCS participants managing nutrient plans and conservation grants
- Compost or biosolid land application contractors
- Erosion control & reclamation professionals
- Soil scientists and agronomists working with CAFO or municipal land use projects
- Engineering firms evaluating soil suitability for site development or restoration
Sample Requirements & Turnaround
- Sample Size: 3–4 cups of soil
- Turnaround Time: 3–5 business days from lab receipt
- Report Format: Lab data only – no fertilizer recommendations or interpretations included
Important Notes
- Uses Mehlich III extraction, which is ideal for acidic to neutral soils
- In alkaline soils, nutrient levels may appear inflated due to over-extraction
- Designed for projects requiring data compliance, not crop-specific management advice
Order the Mehlich III Full – TCEQ / EQIP Test Today
When your project depends on accurate, compliant lab data, this test delivers. Submit your sample and get the complete nutrient and salinity profile required for permitting, funding, or land management decisions.
Frequently Asked Questions
- What are your business hours?
Our office is open Monday thru Friday from 8 am to 5 pm. We do close for major holidays, so we recommend ordering your testing and sending your sample early if a holiday is coming up. You can always reach us by email. Just send us a message at info@tpslab.com
- When will I get my results?
We understand that you need your results as soon as possible. That is why we make sure to begin processing your samples as soon as they arrive at our laboratory. When the results are ready, we will email them to the email address you provided on your submittal form. The list below will give you an idea of our usual turnaround times.
Soil Tests: 5-7 Business days
Water Tests: 5 - 7 Business days
Plants Tests: 24 - 48 Hours
Compost Tests: 7 - 14 Business days
Fertilizer Tests: 3 - 5 Business days
Heavy Metals Test: 7 - 14 Business days
We offer a rush option for an additional 50% of the testing cost, but we would encourage you to give yourself time to test before you get to a point where a rush is needed.
