Laboratory-Measured Mineral Solubility

What We Know

Mineral Tech materials have been evaluated through laboratory testing for mineral composition and selected solubility characteristics. Available analytical reports include guaranteed analyses, complete mineral analyses, and laboratory solubility testing.

The published comparative report summarizes results for a sample identified as Lake Bonneville Marl, common limestone, and dolomitized Lake Bonneville marl. The report does not identify the tested marl as SB-1, SMC-1, 3x, 4x, or GSL Foliar. These numbers should not be used as specifications for those products.

These percentages represent the water-soluble fraction relative to total element content in each tested sample. They are not product guaranteed analyses or measured crop or animal outcomes. Laboratory extraction demonstrated greater water-soluble calcium in the tested Lake Bonneville marl sample than in the tested agricultural limestone sample.

Named product samples

The following analyses are separate from the marl-versus-limestone comparison. Values are from named submitted samples. The supplied laboratory report pages are linked below; billing and contact details have been removed from these review copies. Request a current lot COA before formulation.

Ward Laboratories lists sample IDs SB-1, SMC-1, 3x, and 4x in the complete four-page feed analysis bundle (PDF), with Lab IDs 4641–4644. The June 2026 4x fertilizer screening is a separate submitted sample labeled 4X FLAKES, Lab ID 251; its supplied PDF is marked page 1 of 2. Formal analytical method numbers are not shown on the supplied report pages. Great Salt Lake Foliar Spray has its own finished-product label analysis and is not included in this dry-material table.

Additional named-sample reports: SB-1 Stukenholtz report #10349 (PDF), SMC-1 Stukenholtz report #7635 (PDF), SB-1 Ward lime-quality report, Lab ID 375 (PDF), SMC-1 Ward lime-quality report, Lab ID 376 (PDF), and 4x Ward lime-quality report, Lab ID 378 (PDF). These are distinct samples and tests.

How It Was Measured

The comparative report describes crushed materials suspended and agitated in water, then measured after equilibration. Solubility percentage is calculated as water-soluble concentration divided by total nutrient content. The report says this protocol was described to its author by the laboratory; it does not provide a formal method number or sample ID for the water-soluble reports. The underlying Stukenholtz water-solubility laboratory sheets were not included with the supplied files, so the comparative report is the available source for those values. Review the comparative report for methods, references, and limitations.

Research in Progress

• Geological characterization
• XRD mineral-phase identification
• Silicon and silica characterization
• Product consistency between samples and lots
• Nutrient availability research
• Greenhouse and field testing
• Animal feeding trials

Additional research is underway to determine how laboratory-measured mineral characteristics translate to plant, soil, and animal performance under commercial conditions.