When a MAP fertilizer analysis uses P2O5 equivalents, do not enter that number as elemental phosphorus. Also count the nitrogen supplied by the same material when building a nutrient ledger.
Read the actual grade analysis
Van Iperen’s MAP horticultural-grade technical sheet is an example of a named soluble fertilizer specification. Use the actual offered grade’s guaranteed or agreed analysis; the familiar product name does not establish ENVO’s nutrient guarantee.
For an illustrative material specified as 12% N and 61% P2O5, 100 kg contains 12 kg N and 61 kg P2O5 equivalents. The elemental-P factor is approximately 0.4364, derived from the phosphorus fraction in P2O5. Thus 61 × 0.4364 ≈ 26.62 kg elemental P. The calculation is not a crop application recommendation.
| Ledger entry per hypothetical 100 kg | Quantity |
|---|---|
| Nitrogen | 12.00 kg N |
| Reported phosphate basis | 61.00 kg P2O5 equivalents |
| Converted elemental phosphorus | Approximately 26.62 kg P |
Do not add unlike units
Keep P and P2O5-equivalent fields clearly labelled. They are alternative expressions of the phosphorus contribution, not two separate nutrient masses to add. The oxide-equivalent convention does not mean the fertilizer contains that mass of free phosphorus oxide.
A qualified agronomist or formulation specialist should choose the nutrient target and actual use. For purchasing, send ENVO the required grade analysis, reporting basis, solubility-related criteria and destination. Maintain the N contribution alongside P so a phosphorus-driven addition does not quietly exceed the intended nitrogen budget.
Related decisions
- Granular MAP and water-soluble MAP: a shared name does not qualify the grade
- MAP solution pH: attach the concentration, water and temperature to the result
Review Monoammonium phosphate (MAP) product identity and purchasing requirements. For the decision above, send ENVO your application, acceptance criteria, quantity and destination. Confirm the offered grade and available documents before ordering.
Technical references support the stated material or test method. Confirm the offered grade and current acceptance criteria for your application. Quality and document guidance
Share your application, target properties and test conditions to discuss the next step.
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