Direct final-solution mode
Injector / stock-tank mode
Target vs achieved recipe worksheet
Enter final solution volume, measured source-water nutrient concentrations, nutrient targets and up to three products. Product P and K fields use fertilizer-label P₂O₅ and K₂O conventions; the worksheet converts them to elemental P and K before calculating final mg/L.
| Nutrient | Target mg/L | Achieved mg/L | Difference |
|---|---|---|---|
| N | — | — | |
| P | — | — | |
| K | — | — | |
| Ca | — | — | |
| Mg | — | — | |
| S | — | — |
Advanced trace nutrient worksheet · optional Fe, Mn, Zn, Cu, B and Mo
Use this only when your source-water report and product labels provide these elemental analyses. Values are entered as elemental percentages on product labels and mg/L in the final solution. The optimizer treats missing fields as zero; it does not infer chelate composition, oxidation state, solubility, or availability.
| Nutrient | Source water mg/L | Target mg/L | Achieved mg/L | Difference |
|---|---|---|---|---|
| Fe | — | — | ||
| Mn | — | — | ||
| Zn | — | — | ||
| Cu | — | — | ||
| B | — | — | ||
| Mo | — | — |
| Product row | Fe % | Mn % | Zn % | Cu % | B % | Mo % |
|---|---|---|---|---|---|---|
| Product 1 | ||||||
| Product 2 | ||||||
| Product 3 | ||||||
| Product 4 | ||||||
| Product 5 |
Product cost & stock-group metadata
Optional planning metadata only. Enter your own cost per kilogram, stock handling, chemistry class, planned concentrate volume, and a manufacturer/lab-derived solubility limit when you have one. The screen only flags conservative review conditions from your explicit entries; it does not infer chemical identity from elemental percentages and cannot certify compatibility, precipitation safety, or solubility.
| Product row | Cost / kg | Stock handling | Chemistry class | Planned stock volume (L) | User solubility limit (g/L) |
|---|---|---|---|---|---|
| Product 1 | |||||
| Product 2 | |||||
| Product 3 | |||||
| Product 4 | |||||
| Product 5 |
| Product | g | N % | P₂O₅ % | K₂O % | Ca % | Mg % | S % |
|---|---|---|---|---|---|---|---|
Nutrient fields can be entered manually. Use Water Quality Lab to carry source chemistry, report provenance and non-modeled ions into this worksheet.
Load Water Lab chemistry to see mapped optimizer nutrients, fallback species, missing fields and interpretation-only context.
Enter the guaranteed analysis for each product you actually use, then auto-balance. P and K inputs are interpreted as P₂O₅ and K₂O label values.
N-P-K oxide conversion reference
Use exact molecular-mass conversion factors rather than assuming label P₂O₅ and K₂O values are elemental P and K.
Mixing discipline
Record the mixed solution
Enter an expected/reference EC and a measured final EC to compare them. The nutrient optimizer does not predict EC from elemental ppm.
Guided mix workflow
Build a checklist from the active recipe so the same source-water check, product order, and final verification steps can be repeated each batch. This workflow records procedure completion only; compatibility and solubility warnings remain separate chemistry checks.
Saved fertigation mixes
| Saved | Recipe | Volume | Final EC | Final pH | Actions |
|---|
Repeatability check
The deltas compare the two latest saved mixes. They describe repeatability only; they do not determine crop suitability.
User-defined fertilizer product library
Save the guaranteed analysis from a product row you have verified from its label or technical sheet. This library stores only values you enter; it does not ship guessed or brand-specific analyses.
| Product | N % | P₂O₅ % | K₂O % | Ca % | Mg % | S % | Trace Fe/Mn/Zn/Cu/B/Mo % | Cost / kg | Stock handling | Chemistry | Stock L | Solubility g/L | Saved |
|---|
Saved recipe library
Reuse your own target and product worksheets without re-entering every value. Recipes and saved product analyses are local to this browser unless you export a workspace backup.
| Saved | Name | Volume | Source N/P/K/Ca/Mg/S | Targets N/P/K/Ca/Mg/S | Actions |
|---|
Current scope and calculation boundaries
The worksheet and optimizer compare entered N, P, K, Ca, Mg, S, Fe, Mn, Zn, Cu, B and Mo targets against up to five user-defined products, with P₂O₅ and K₂O converted to elemental P and K. The optimizer minimizes relative target error using non-negative product masses. It does not infer missing label data, chelate form, oxidation state, or safe stock-tank compatibility, predict precipitation or solubility, certify stock-tank compatibility, or replace measured EC/pH verification after mixing. Expected/reference EC is user-supplied verification context; the elemental solver does not predict conductivity. Water Lab alkalinity, hardness, sodium, chloride, nitrate-N, sulfate-S and report/method metadata are preserved as interpretation context but are not separate optimizer targets. When total N or total S is blank, explicitly reported nitrate-N or sulfate-S can populate the corresponding elemental source-water field as a fallback; the tool never adds both forms together. Product cost, stock-group, chemistry-class, stock-volume and solubility-limit fields are user-entered planning metadata. Compatibility screening is conservative decision support only and is not a precipitation, solubility, or concentrate-safety certification.