Seeds and Propagation
Plug Tray Occupancy Calculator
Plug Tray Occupancy requires one defined scenario. Calculate the share of plug-tray cells containing usable seedlings. Use occupied cells and tray cells from the Plug Tray Occupancy record.
Enter values for tray occupancy
Plug Tray Occupancy needs occupied cells and tray cells from one case.
How Plug Tray Occupancy performs the calculation
Plug Tray Occupancy compares Occupied cells and Tray cells and reports the relationship as a percentage. Estimated seeds: Seed Weight to Count Calculator handles this follow-up.
Using occupied cells at 116 cells and tray cells at 128 cells, the example returns 90.63% and 9.4%.
Reading tray occupancy
Read Tray occupancy as the answer to “Calculate the share of plug-tray cells containing usable seedlings.” Keep the Plug Tray Occupancy units attached.
Empty-cell share supplements tray occupancy in Plug Tray Occupancy.
Preparing the Plug Tray Occupancy values
The Plug Tray Occupancy input panel defines Occupied cells and Tray cells. Note any Plug Tray Occupancy conversion.
Occupied cells. Default in Plug Tray Occupancy: 116 cells.
Tray cells. Default in Plug Tray Occupancy: 128 cells.
Tray occupancy: condition to verify
Count doubles and weak seedlings separately when quality matters.
A zero Tray cells leaves tray occupancy undefined in Plug Tray Occupancy.
Purpose of the tray occupancy estimate
Calculate the share of plug-tray cells containing usable seedlings. Plug Tray Occupancy limits that task to Occupied cells and Tray cells.
Save Tray occupancy with the Plug Tray Occupancy units and scenario name. Concentrate volume? See Rooting Hormone Dilution Calculator.
Documenting tray occupancy
Archive the Plug Tray Occupancy inputs—Occupied cells and Tray cells—beside Tray occupancy.
A short source note for occupied cells is enough to distinguish evidence from an assumption.
When the garden work is finished, append the actual tray occupancy rather than revising the prediction.
What changes when occupied cells changes
In the Plug Tray Occupancy example, changing Occupied cells from 116 cells to 127.6 cells produces 99.69% rather than 90.63%. A separate estimate of seedlings to produce comes from Transplant Production Buffer Calculator.
Use occupied cells only to compare tray occupancy.
Pair occupied cells with Plug Tray Occupancy site observations.
Common questions about occupied cells
Do propagation conditions affect Plug Tray Occupancy?
Temperature, moisture, treatment, and handling can change the stage measured by tray occupancy.
How does “Count doubles and weak seedlings separately when quality matters.” affect tray occupancy?
Account for it in the source measurement for occupied cells; the formula has no additional correction for it.