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Soil Testing in Arizona: Private Labs, High Cost, Nearby Alternatives

Arizona has few public soil test options. University of Arizona lists private labs (pricey). Cheaper: New Mexico State University lab (à la carte), Nevada Extension (free pH/salinity), Utah State University ($).

Arizona Private Labs

cals.arizona.edu — contact for rates.

Nearby Options

NM State: swatlab.nmsu.edu
Nevada: free pH/salinity via Extension.
Utah State: (435) 797-2217, salinity focus.

Why Test?

Horse manure-rich soil likely has high nutrients but possible salt/ph issues. Test reveals what to correct—saves money vs. blind fertilizing.

Fertilizer: Cow vs. Horse Manure for Vegetables: Both Work — If Composted; Manure for Flowers vs. Vegetables: Composted Only, Match Nitrogen Form; Horse Manure Age: Older Is Better for Vegetable Plots; Too Much Horse Manure? How to Diagnose and Fix Nutrient Imbalance; Fixing a Tomato Garden Ruined by Fresh Horse Manure; Milorganite vs. Composted Manure: Which Is Better for Flower Beds?; Evaluating Fire-Affected Horse Manure for Garden Use; Fresh Manure in the Garden: Hot vs. Cold, Composting Rules, and Salt Risks; Why Home Soil Test Kits Fall Short and Professional Testing Is Worth It; Choosing the Right Manure for Lawns and Gardens: Cow vs. Horse

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