Organic programs
OMRI Listed calcium carbonate.
A natural marine calcium carbonate carrying two OMRI listings — crop fertilizer avw-23214 and livestock feed material avw-23215.
What the listing is
A listing, not a certification.
OMRI Listing is a review of a material’s suitability for use in certified organic production, published by the Organic Materials Review Institute; it is a listing rather than a product certification. The distinction matters at audit time, so it is worth being precise about which document does what.
- Crop fertilizer listing
- avw-23214
- Livestock feed listing
- avw-23215
- Composition
- 96.17% CaCO3
- Elemental calcium
- 38.51%
For soil amendment, growing-media and turf programs.
For feed-mineral formulations.
Representative analysis, ASTM C 25, Bowser-Morner report 124914A.
Same report and method as the composition figure.
Reading the two listings
Which one applies depends on the use.
The same material carries two listings because it is reviewed under two different input categories. Cite the one that matches how the material is actually used on the operation.
| Listing | Identifier | Input category | Where it applies |
|---|---|---|---|
| Crop fertilizer | avw-23214 | Crop fertilizers and soil amendments | Field soil, growing media, nursery and turf programs |
| Livestock feed material | avw-23215 | Livestock feed materials | Calcium contribution within feed-mineral formulations |
What a certifier asks for
The paperwork behind an input approval.
An organic certifier reviews the input against the operation’s system plan. These are the items that review normally works from.
- The listing identifier — avw-23214 for crop use or avw-23215 for feed use, cited against the product as supplied.
- Product identity and grade — the grade code and particle sizing, so the reviewed material matches the delivered material.
- Source documentation — material is sourced in The Bahamas through Aragosan Minerals Limited, and source documentation is available.
- Safety data — the safety data sheet for the supplied material, requested through the contact form.
- Intended use and rate — how the input enters the operation — the application, rate basis and records the system plan calls for.
- Your certifier’s determination — a listing supports the review; the decision for a specific operation is the certifier’s to make.
The material behind the listing
A mineral that is collected, not manufactured.
The listings describe a specific material. This is what that material is.
Natural marine origin
Oolitic aragonite forms as rounded, concentrically layered grains on the Great Bahama Bank. It is collected rather than quarried.
Mechanically prepared
Collection, drying, screening and sizing. There is no calcination step and no chemical synthesis in AragoCor processing.
Documented chemistry
96.17% CaCO3 with 38.51% elemental calcium, representative analysis by ASTM C 25. CAS number 1317-65-3, the naturally occurring mineral.
Graded for the use
AG-CAL at 0.2–0.5 mm for soil and media programs, with blends across mesh 20 to 325 where an application needs a different distribution.
Using it in a program
Confirm first, then specify.
Confirm
Send the listing identifier and product details to your certifier with the intended use, and confirm the input against the operation’s system plan.
Specify
Match the grade and particle sizing to the application, whether that is a soil program, a growing medium or a feed formulation.
Document
Keep the listing reference, grade specification and safety data with the operation’s input records.
Questions
Frequently asked questions.
Is the OMRI status a certification or a listing?
OMRI operates a listing program, not a certification program, so the accurate description is OMRI Listed. OMRI Listing is a review of a material’s suitability for use in certified organic production, published by the Organic Materials Review Institute; it is a listing rather than a product certification.
What are the listing identifiers?
Crop fertilizer listing avw-23214 and livestock feed-material listing avw-23215.
Does the listing mean I can use it on a certified organic operation?
It supports the review. The determination for a specific operation rests with your certifier, who assesses the input against the operation’s organic system plan. Send the listing identifier and the intended use to your certifier before the material goes on.
Which listing applies to animal feed?
The livestock feed-material listing, avw-23215. The crop fertilizer listing avw-23214 covers soil-amendment, growing-media and turf use.
What is the material itself?
Natural oolitic aragonite — a marine-origin calcium carbonate, the orthorhombic polymorph of CaCO3, CAS 1317-65-3. Composition is 96.17% CaCO3 with 38.51% elemental calcium, and it is collected and mechanically sized without calcination.
What documentation can be supplied?
The listing references, grade specifications, analytical documentation, the safety data sheet and source documentation, all available through the contact form.
Keep reading
Where to go next.
Request the OMRI listing documentation.
Tell us the crop or species, the intended use and your certifier’s requirements, and AragoCor will provide the listing reference and grade documentation.