TPSL Plant Natural® Soil Test + LOI + Solvita®
A Deeper Look Into Soil Biology and Fertility for Long-Term Success
Go Beyond the Basics — Discover the Biological Life of Your Soil
Healthy soil isn’t just about nutrients and pH—it’s a living ecosystem. The Soil Health Test with Solvita® gives you a full-spectrum view of your soil’s physical, chemical, and biological health.
This test includes everything from nutrient levels and organic matter to the Solvita® CO₂ Burst Test, which reveals the biological activity driving nutrient cycling and root health. Whether you're managing a high-value crop, rebuilding poor soils, or improving sustainability, this test gives you the clarity to make better decisions.
What’s Included in Your Analysis:
Soil Properties
- Texture
- pH
- Electrical Conductivity (EC)
- Carbonates (CO₃)
- % Active Organic Matter
- Total Organic Matter (LOI – Loss on Ignition)
Nutrient Levels
- Nitrate-Nitrogen (NO₃-N)
- Phosphate (P₂O₅)
- Potassium (H₂O & CO₂ extractable)
- Sodium (H₂O & CO₂ extractable)
- Calcium (H₂O & CO₂ extractable)
- Magnesium (H₂O & CO₂ extractable)
Micronutrients
- Zinc (Zn)
- Iron (Fe)
- Manganese (Mn)
- Copper (Cu)
Soil Ratios
- Sodium to Calcium (Na:Ca)
- Sodium to Magnesium (Na:Mg)
Biological Activity
- Solvita® CO₂ Burst Test – Measures microbial respiration to estimate microbial biomass and soil biological activity
Why Solvita® Matters
The Solvita® test is a rapid soil respiration method that estimates microbial activity by measuring CO₂ release from the soil. This matters because:
- Active soils = efficient nutrient cycling
- Microbial respiration indicates biological fertility, not just chemical
- Helps assess whether your soil amendments are building life—or just feeding plants short-term
By integrating Solvita® into your soil test, you can:
- Monitor your soil’s biological recovery over time
- Make better decisions about compost, cover crops, and microbial inoculants
- Predict how efficiently your soil can deliver nutrients to plants
What You’ll Receive:
- Color-Coded 2-Page Report
Easy-to-read with clear indicators and highlighted values - Crop-Specific Recommendations
Custom fertilizer guidelines for up to two crops of your choice - Plant Nutrient Removal Rates
Estimate of nutrients used by your crops to guide future amendments - Fertilizer Guidelines
Product-neutral advice to help you meet your soil’s needs without waste
Sample Requirements & Turnaround
- Minimum Sample Size: 3–4 cups of soil
- Turnaround Time: 5–7 business days from receipt at the lab
Need Help Interpreting Results?
Our Certified Crop Advisor is available for one-on-one consultations at $25 per 10-minute session.
📞 Call to schedule a consultation once your results are in.
Why Choose TPS Lab?
- Over 80 years of expertise in soil science and fertility
- Trusted by farmers, growers, landscapers, and researchers across the U.S.
- Personalized recommendations backed by real-world agronomic experience
- We go beyond numbers— we help you grow better crops
Order the Soil Health Test with Solvita® Today
Take control of your soil’s biology, chemistry, and fertility. With Solvita® insights and expert guidance, you’ll know how to feed the soil—so it can feed your plants.
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.
