China: Operator Training for Semi-Automatic Grafting
A practical look at feeding roles, finished-plant handling and the training that remains after automation.
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China | Customer Case Study
Closing Empty Cells: Vision-Guided Seedling Replenishment in China
Vision-guided plug tray inspection and seedling replenishment
One Empty Cell Is Small. Checking Every Tray Is Not.
Empty cells and weak seedlings turn a tray-ready task into a repeated inspection job. Workers have to check trays, find acceptable replacement plants and handle the plugs without damaging their roots. This Chinese case focuses on AiGRAFT's vision-guided seedling selection and replenishment workflow. Its purpose is different from ordinary transplanting: identify the positions that need attention and replenish them before the tray moves to its next nursery stage.
Nursery
Commercial vegetable seedling operation
Country
China
Crop Focus
Vegetable plug seedlings
Equipment
Vision-guided seedling selection and replenishment machine
Project Focus
Address empty cells and unsuitable seedlings within a defined plug tray inspection workflow.
Operational Checkpoints
Tray geometry; visible seedling criteria; replacement plug condition
Tray Quality Needs a Clear Rule for What Stays and What Is Replaced
A camera-assisted selection process needs agreed visual criteria and a dependable supply of replacement seedlings.
The case video shows the mechanical replenishment sequence. In production, that movement depends on a decision made earlier: which cell needs another seedling? Empty-cell detection and the assessment of a weak seedling are different tasks, so the nursery should define and trial both with its own trays.
The replacement supply matters just as much. Donor seedlings need to be suitable for the destination batch, and their root plugs must tolerate the handling method. Filling a gap with a poorly matched plant can leave a visually full tray that still lacks useful uniformity.
Vision-guided replenishment should therefore be evaluated as one part of tray quality control. It does not correct the original cause of poor emergence, irrigation variation or a crop health problem. Those issues still need nursery management, alongside checks of the trays leaving the machine.
Three Inputs That Define the Replenishment Setup
- Tray dimensions and cell layoutProvide external tray dimensions, cell count and representative trays for the handling evaluation.
- Examples of acceptable and weak plantsUse crop-specific images and sample batches to agree which visible characteristics the selection process should assess.
- A supply of suitable donor plugsMatch replacement seedlings to the receiving batch and inspect plug handling, placement and the finished tray.
