Commercial Agricultural Soil Testing Directory

One of the largest agricultural testing facilities in North America. Features comprehensive precision ag electronic data exchange (EDD/CSV) for grid and zone sampling.

• Turnaround: 2–3 business days
• Key Panels: Basic Agronomic Fertility (S1A), Complete Micronutrient & CEC (S3C)
• Methods: Bray-1 P, Mehlich-3
• Pricing: $15–$25 standard routine fertility packages; volume commercial tiering available.

Specializes in Northeast acid and glaciated soils utilizing official Cornell Morgan nutrient extraction calibrations.

• Turnaround: 3–5 business days
• Key Panels: Routine Fertility (pH, Buffer pH, P, K, Ca, Mg), Micronutrient Package (Zn, Mn, Fe, Cu, B)
• Methods: Morgan Extraction, Modified Morgan
• Pricing: $16 standard routine fertility; $24 comprehensive fertility with micronutrients.

Premier Central Valley facility tailored for high-value California specialty crops, almond orchards, wine grapes, and saline/alkali soils.

• Turnaround: 3–5 business days
• Key Panels: Comprehensive Soil Salinity & Sodicity Hazard (ECe, SAR, ESP), Vineyard & Orchard Fertility Analysis
• Methods: Olsen P (Bicarbonate), Saturated Paste Extract
• Pricing: $35–$65 for specialty crop fertility and complete salinity hazard diagnostics.

Pacific Northwest agricultural authority specializing in irrigated row crops, potato fertility, and root-knot nematode assays.

• Turnaround: 2–4 business days
• Key Panels: Columbia Basin Irrigated Crop Fertility, Potato & Onion Cyst Nematode Bioassay
• Methods: Olsen Bicarbonate, DTPA Micronutrients
• Pricing: $22–$40 standard agronomic profile; expedited harvest-season turnaround available.

Major Upper Midwest testing network with regional facilities in Minnesota, Iowa, and North Dakota serving Corn Belt row crop producers.

• Turnaround: 3–5 business days
• Key Panels: Upper Midwest Corn & Soybean Standard Fertility, Manure Analysis Proficiency (MAP) Nutrients
• Methods: Bray-1 P, Olsen P
• Pricing: $14–$22 standard fertility packages.

Operates high-throughput laboratories in Hastings, Nebraska and Dodge City, Kansas, specializing in high-plains irrigated grain and forage.

• Turnaround: 2–3 business days
• Key Panels: Great Plains Precision Ag Fertility Profile, Deep Profile Nitrate (0-12", 12-24", 24-36")
• Methods: Mehlich-3, Bray-1 P
• Pricing: $16–$28 routine and deep-profile nitrogen packages.

Dedicated Southeastern facility calibrated for coastal plain sandy loam soils and warm-season row crop fertility.

• Turnaround: 2–4 business days
• Key Panels: Warm-Season Agronomic Panel (Cotton, Peanuts, Corn, Pecans), Secondary & Micronutrient Availability
• Methods: Mehlich-1 (Double Acid), Mehlich-3
• Pricing: $12–$20 routine agronomic panels.

Premier Mid-Atlantic public land-grant university facility providing agronomic crop recommendations across field crops, forage, and pasture.

• Turnaround: 5–7 business days
• Key Panels: Standard Agricultural Fertility (pH, P, K, Mg, Ca, Acidity, CEC), Micronutrient Add-On Package (Zn, Cu, S)
• Methods: Mehlich-3 ICP, SMP Buffer pH
• Pricing: $10 standard routine fertility; $15 with organic matter.

Authoritative Texas institution providing crop-specific nutrient recommendations calibrated for alkaline, calcareous, and clay soils.

• Turnaround: 5–7 business days
• Key Panels: Routine Soil Fertility (pH, NO3-N, P, K, Ca, Mg, Na, S, Conductivity), Micronutrient Suite (Zn, Fe, Cu, Mn)
• Methods: Mehlich-3 by ICP, Texas A&M Modified Extractant
• Pricing: $12 routine analysis; $19 routine plus micronutrients.

Specialized laboratory focused on small-acreage farmers, berry producers, and organic growers with custom organic amendment recommendations.

• Turnaround: 3–5 business days
• Key Panels: Small Farm & Market Garden Comprehensive Fertility, Organic Fertilizer Amendment Recommendations
• Methods: Morgan Extractant, Mehlich-3
• Pricing: $25 basic fertility; $45 comprehensive agronomic and micronutrient package.