Mehlich III Basic
Fast, Affordable Nutrient Snapshot for Acidic or Neutral Soils
A No-Frills Soil Nutrient Analysis—Done Right
Looking for a quick, cost-effective look at your soil’s basic fertility? The Mehlich III Basic Soil Test delivers a streamlined nutrient panel using the same extraction method used by university and extension labs across the country.
This is an ideal test for routine monitoring, home gardens, budget-conscious projects, or as a baseline check before diving into more comprehensive testing. While it has some limitations on high-pH (alkaline) soils, it’s a reliable choice for many standard field and garden soils.
What’s Included in Your Analysis
Tested using the Mehlich III strong-acid extraction:
- Calcium (Ca) – Essential for root strength, nutrient uptake, and soil structure
- Magnesium (Mg) – Supports chlorophyll production and photosynthesis
- Sodium (Na) – High levels can impact soil structure and crop health
- Potassium (K) – Critical for fruit quality, disease resistance, and drought tolerance
- Phosphorus (P) – Key for root development and energy transfer
Sample Requirements & Turnaround
- Minimum Sample Size: 3–4 cups of soil
- Turnaround Time: 3–5 business days from lab receipt
Important Notes
- This test uses the Mehlich III extraction method, ideal for acidic to neutral soils.
In alkaline soils, this method may overestimate nutrient availability, especially phosphorus and micronutrients. - No interpretations or fertilizer recommendations
are included with this test.
It’s best suited for agronomists, consultants, or experienced growers who can interpret results independently.
Perfect For:
- Budget-conscious growers and hobbyists
- Baseline nutrient checks before planting
- DIY soil enthusiasts using third-party tools for interpretation
- Consultants or resellers needing quick, raw data for acidic soils
Need More Than Just Numbers?
If you're looking for expert guidance, customized fertilizer plans, or a broader view of soil health, we recommend upgrading to one of our TPSL® Plant Natural Soil Tests , which include full interpretation, recommendations, and in-depth nutrient panels.
Order the Mehlich III Basic Soil Test Today
When you just need the basics—fast and affordable—this test gets the job done. Submit your sample and get clear, lab-verified numbers you can trust.
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.
