Description
Calculate seedling transfer losses against the pre-transfer count.
Vertical-farm records distinguish nominal growing area from floor footprint, occupied cells from healthy seedlings, and supplied lighting power from photon flux. Energy accumulates power over time, while flux per area is an instantaneous spatial basis. Counts, runtime readings and water shares need consistent periods and references before they can describe a real facility.
Calculate seedling transfer losses against the pre-transfer count.
When to use this tool
Use Grow Tray Seedling Transfer Loss when you already have seedlingsBefore, seedlingsAfter and need to calculate seedling transfer losses against the pre-transfer count.
How to use the tool and how it works
- Enter seedlingsBefore, seedlingsAfter. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read lostSeedlings, lossFraction. Use the output convention below.
Require safe whole seedlingsBefore>=1 and seedlingsAfter in [0,before]; return before-after and lost/before.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| seedlingsBefore | Seedlings Before | Required. Safe integer; minimum 1. |
| seedlingsAfter | Seedlings After | Required. Safe integer; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| lostSeedlings | Lost Seedlings | Required. Safe integer. |
| lossFraction | Loss Fraction | Required. Finite number. |
{
"input": {
"seedlingsBefore": 100,
"seedlingsAfter": 95
},
"output": {
"lostSeedlings": 5,
"lossFraction": 0.05
}
}Limitations and assumptions
- The denominator is the recorded pre-transfer count; the tool does not identify causes of loss or recommend treatment.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use measured fixture input and runtime logs for energy, a spatially sampled light map for illumination, and verified tray inventories for occupancy. Reconcile volumes and reference periods before extending one local share to a whole facility.
References
Similar or alternative tools
- Grow Tray Occupied Cell Share
Calculate tray-cell occupancy and empty cell count.
- Grow Room Temperature Offset
Calculate a growing room's signed temperature offset from a reference.