Optimizing soil biology is one of the most cost-effective ways to boost fertility and crop performance. Many growers already have the nutrients they need locked in their soils—but without the right microbial activity, those nutrients stay out of reach. Soil biology testing helps you identify and activate the microbial communities that unlock phosphorus, nitrogen, and micronutrients, reducing your dependence on synthetic inputs and cutting input costs season after season. Whether you're aiming for better water use, healthier plants, or a transition to regenerative practices, the right test can reveal the microbial engine driving your soil’s potential.

🔶 Know Your Biology: Key Soil Tests in the U.S.

Different soil biology tests target different layers of microbial life. Some measure functional potential (what microbes can do), while others assess biomass (how many are there) or community composition (who's there). Here are the most common types:

- PLFA (Phospholipid Fatty Acid Analysis): Measures total microbial biomass and gives insight into bacterial-to-fungal ratios. Useful for understanding microbial community structure and shifts after management changes.

- Solvita® CO₂ Burst Test: A simple, accessible test for microbial respiration. Great for gauging active microbial life and general soil health.

- Haney Test: Combines chemical and biological indicators. Includes a Soil Health Score based on microbial respiration and available nutrients.

- DNA-Based (e.g., metagenomics, qPCR): Identifies specific microbial species and functional genes, including nitrogen-fixing bacteria or mycorrhizal fungi. High-resolution but often more expensive and complex.

- Microscopy (e.g., Soil Food Web Analysis): A hands-on look at actual organisms under a microscope. Can help diagnose imbalances (e.g., too many bacterial feeders, not enough predators).

🔶 Choosing the Right Tool for Your Goals

- Tracking regenerative progress? Use PLFA or Haney over time.

- Need a snapshot of microbial life? Solvita or PLFA offer quick, affordable insights.

- Troubleshooting plant stress or nutrient issues? DNA tests or microscopy can reveal microbial causes.

💡 The best biology test is the one aligned with your soil goals. Soil Beat helps farmers and agronomists interpret these tests and link biology with nutrient management, water use, and crop performance—for healthier soil and better ROI.