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INDUSTRY FIELD GUIDE

Phosphatic fertilizer data for AI reporting-basis checks

University of Minnesota Extension explains the nutrient notation used on fertilizer labels.

By Fiund · Updated 2026-11-05

NAICS 325312 · Phosphatic Fertilizer Manufacturing

University of Minnesota Extension explains the nutrient notation used on fertilizer labels. A manufacturer can build a precise document task around retaining the reported phosphate basis rather than comparing every phosphorus-related number directly. UMN fertilizer-label context

Prepare fictional sample reports, a product card and a customer request. Name the reporting basis explicitly and supply any exercise conversion rule. Include another report using a different basis without the input needed for conversion. Ask which comparisons are supported and show the source of every value used. Add a result from the wrong product lot with an attractive matching number.

Label reported nutrient basis, lot, specimen, unit and calculation source. Hold out a new report layout for evaluation. Score unlike-basis comparisons, wrong-lot substitutions and invented conversion inputs separately. A correct answer should identify sufficient evidence in a complete case and a specific missing field in the incomplete case.

Use original reports and invented measurements, with no fertilizer preparation or application involved. Customer product requirements, process records and laboratory documents need permission appropriate to their source. A licensing brief should identify the basis-review task and qualified reviewer key. Establish buyer requirements before preparing a larger chemical archive.

Discuss this original manufacturing sample with Fiund

Original Fiund exercise

Two reports describe different fractions

Invented sample reports use neutral fractions A and B. No real fertilizer specification or application is discussed.

Fictional records supplied to the evaluator
RecordSourceWhat it records
1RequestRetrieve fraction A for sample P14 on mass basis.
2Report XP14, mass basis, combined fractions A+B.
3Report YP14, fraction A, volume basis; no conversion factors supplied.

Question for the model

Can either report supply the requested value?

Show the reference answer and checks

No. X in record 2 matches the mass basis but combines A and B. Y in record 3 isolates fraction A but uses a different denominator. Keep both results associated with their definitions and mark the precise fraction-A mass value unavailable.

  • Using a combined value for one fraction
  • Treating mass and volume denominators as interchangeable

Fields to preserve

fraction_definition
Distinguishes isolated and aggregate values
denominator_basis
Controls comparison or conversion
conversion_evidence
Marks whether normalization is supported

Test another case

Add a documented relationship for the same sample and verify that the conversion applies to the exact reported fraction.

No actual nutrient guarantees, agronomy, formulations or application rates.

Download this fictional example and answer key (JSON)

Discuss a contribution

Describe the sources you control, the task they could support and what has already been checked. Use the existing-data assessment for an archive or the collection brief for a new recording project. The contributor agreement defines Fiund’s licensing authority and compensation. A guide or fictional exercise does not establish an accepted collection or a sale.

Primary sources and further reading