User manual
Nursery (Nurserier)
Starts the product lifecycle: register nursery boundary (geo-fence), sowing/sticking, care, and seedling sales. Use the Mobile App.
Workflow steps
Detailed instructions
- Nursery activities are managed and performed on the aGreen Traceability Mobile App.
- An internet connection is required to sign in (after a successful login, you can work in the field without internet except for functions that require a connection).
- Open the Mobile App and sign in with your registered phone number and password.
- If the account is not yet activated, complete activation per the registration guide before continuing.
- From the home screen you can manage the map, warehouse, and activity recording menus.
- From your next login, you can use the device biometric authentication function to sign in.
Mobile App
Login screen 
Nurserier home screen Detailed instructions
- Note: Boundary registration can only be performed once for a nursery newly joining the System. Boundary registration should be defined for the entire cultivation area under one land-owner, and thus may be subdivided into smaller parcels during operations.
- Note: You need an internet connection to download the satellite basemap. If you do not have internet or 4G/5G at your nursery, open aGreen Traceability while online, zoom and pan the basemap over the nursery area to save it on the device, then you can register the boundary offline. Data created offline is stored on the device and will be synced automatically when the network returns.
- Your registered boundary will be verified to avoid overlap with previously registered areas and to verify the start of cultivation. You will receive a confirmation email or a request to coordinate verification.
- Nursery-related activities will only be recorded when performed inside the virtual fence; therefore the registered area must match the actual field.
- If you have more than one non-adjacent parcel, you can register each parcel one at a time in the same session.
- Using data verified by the competent authority is encouraged (use the 'Available data' function).
2.1Open the Nursery map from the home screen
- After sign-in, the Nurserier home screen displays the function buttons.
- To register the nursery boundary, tap the 'Area' button to open the map.
Tap the 'Area' button to open the map 2.2Newly registered nursery
- If you do not yet have a nursery boundary map, an information dialog will appear. Please read it carefully.
- Tap AGREE to register a new land parcel in the following steps, or tap CANCEL if you registered successfully before and want to work with that parcel, or contact the competent authority if the data is incorrect.
Information about a newly registered nursery 2.3Choose how to draw the boundary
- On the Seedling map interface, tap the red + button (bottom-right of the screen) to open the geometry menu.
- Polygon of plants, walk around the nursery perimeter to define the boundary (recommended for most cases).
- Band of plants: move along the centre of your plot/line segment; the app automatically creates a 10 m buffer on each side to form a zone (suitable for narrow plots, width under about 20 m).
- Point of plants: mark your standing position and the app automatically creates a circle with a 10 m radius (for very small nurseries or a single location).
- Available data: upload parcel data saved on the device.
- Tap X to close the menu.
Options for drawing the boundary to register 2.4Notice about creating the virtual fence
- After choosing Polygon of plants (or Band of plants or Point of plants) as described below, please read the dialog content carefully.
- The function builds a virtual fence from GPS coordinates recorded along your path.
- Location services (determining your position via the Global Navigation Satellite System - GNSS) will run in the background while you map.
- Tap AGREE to continue or CANCEL to return to the previous screen.
Notice about creating the virtual fence 2.5Automatic waypoint saving
- For large areas or users who must drive around the cultivation perimeter (may not apply to nurseries), you can choose Automatic waypoint saving (tap the signpost-with-clock icon at the top right of the screen); the Set interval dialog will appear.
- Enter the time interval (in seconds) for saving waypoints automatically.
- Note that this function may create many coordinate points in one area if you do not move continuously at a steady speed. To stop it, tap the manual waypoint/photo button at the bottom right of the screen.
- After entering the interval value, tap AGREE to start automatic saving or CANCEL to exit this mode.
Guide and interval entry for automatic waypoint saving 2.6Collect coordinates around the cultivation boundary and field photos
- To save a coordinate point, perform two actions in sequence: tap the navigation button (rightmost on the bottom toolbar) and tap the add-waypoint button (red inverted teardrop icon).
- Each time you tap add waypoint, a prompt to take a field photo appears, as shown below.
- If you do not want a photo at that point, tap CANCEL to continue saving coordinates at the next point. If you want a field photo at this coordinate, tap AGREE to take the photo.
Take a photo at the current coordinate or not 2.7Create and refine the virtual fence
- While mapping the boundary, some points may be very hard to access to exactly due to terrain, obstacles, or insufficient GPS signal. The app includes a correction feature: move a saved point to the required coordinate.
- After saving a waypoint, tap and hold the pink marker at the waypoint you want to move, drag the marker to the desired location, then release to move the coordinate.
- While dragging, distance and direction information appears at the top right of the screen, relative to the coordinate before the move. However, the move distance must not exceed 20 m (twenty metres). If you drag beyond 20 m from the original point, the app warns you and on release the coordinate returns to the maximum 20 m distance.
How to create and refine the virtual fence 2.8Complete virtual fence creation
- While walking to collect coordinates around the nursery area (virtual fence), collect as many points as possible around the variable boundary, the more points collected, the higher the accuracy of your boundary and area, and the easier it is for central processors to verify the data, reducing the need for repeated follow-up with you.
- For field photos during virtual fence creation, you are advised to provide 1–2 photos while saving points to document land use at the time of nursery area registration.
Completing virtual fence creation 2.9How to take geo-tagged field photos
- While collecting coordinates, if you want a field photo tap AGREE as described above; the in-app camera interface opens. Hold the phone horizontally with the shutter button on your right, keep it steady, point the rear lens toward the centre of the nursery, and tap the shutter with your right thumb.
- If the shooting angle or subject does not meet your requirements, tap X on the camera interface to close it and move to the next point. Field photos taken with the aGreen Traceability in-app camera overlay coordinates, shooting direction, and capture time directly on the image to support status verification.
How to take geo-tagged field photos 2.10Close the zone at the final point
- From the third waypoint onwards (minimum number of points to form a closed zone), the save-zone button is activated (tick mark at the top right, just below GPS accuracy information).
- After completing coordinate collection and at least one field photo, tap this close-zone button to finish collecting coordinates and field photos.
Virtual fence ready to close 2.11Register a cultivation line
- aGreen Traceability also supports creating a virtual fence from a buffered path, similar to zone survey.
- Instead of walking around the cultivation area/nursery, move along the centre of your plot/line segment; the app automatically creates a 10 m buffer on each side to form a zone (suitable for narrow plots, width under about 20 m).
- Other steps (including automatic waypoint saving) are the same as for zone mapping described above.
Guide to creating a cultivation line 
Illustration of cultivation line registration 2.12Register a cultivation point
For small nurseries (under about 300 m²) that are compact, consider registering a cultivation point: mark the centre of the nursery and the app automatically creates a circle with a 10 m radius (about 314 m²).
Guide to cultivation point registration 
Illustration of cultivation point registration 2.13Available data
- Using data verified by the competent authority is encouraged ('Available data').
- It is preferable, more accurate, and more lawful if you can obtain spatial data for your land parcel/nursery from the competent authority (*.GeoJSON file, WGS-84 geographic coordinate system).
- Open the red + button (bottom-right) on the Nursery map to open the geometry menu, then choose 'Available data' and select the *.geojson file provided by the competent authority saved on your phone.
Available data illustration 2.14Land parcel registration form
- After creating the virtual fence (completing spatial boundary data for the nursery), fill in the basic and required information for nursery boundary registration.
- Type of land certificate: choose one of the certificate types (e.g. land use right certificate).
- Land use tenure: enter the land use expiry year (if you have a certificate).
- Parcel area: you cannot enter this yourself as the App calculates it from the map. However, you must check and compare it with the area stated on your land use certificate.
- Tree species: select the species actually sown in the nursery. If seedlings have not yet been sown, choose 'Not planted'.
- Cultivating since: select when the nursery has been in stable cultivation. If this date is before 2018, choose 2018.
- Status: describe current status (Pending approval (self-mapped and registered, not yet approved), Newly planted, or Bare land (seedlings harvested or never sown)).
- Tap Send registration to upload.
- If you have not selected all required parameters correctly, the 'Send registration' button will not yet be enabled.
Land parcel registration form illustration 2.15Data verification
- After you send the registration, the system checks your boundary data for duplicates or overlaps with existing parcels (partial or whole). If your parcel fully duplicates or is contained within existing data, the system refuses the registration and shows a warning so you can review and adjust your boundary data before trying again. If only part of your parcel overlaps with existing data, you can review the adjusted boundary (showing the existing registered plot, your original drawing, and the remaining area) then choose to confirm and upload the remaining area or cancel.
- Once submitted successfully, a success dialog confirms that you have submitted the registration of your nursery area, together with information on land use rights, cultivation start date, tree species, status, etc.
- The system sends your registration request to the competent authority for verification. Verification results will be sent to your email address. Check your email and follow the instructions to coordinate resolution if needed.
- You may need to confirm again with the competent authority before official approval and before conducting business activities on the registered area.
- NOTE: This registration confirms the legal basis for your future seedling activities; please pay careful attention during registration.
Overlapping (duplicate, within, contain) warning 
Overlap trimming tool, make your data cleaned 
Registration successful Detailed instructions
- If you do not yet have a registered and verified nursery boundary, register the boundary first (follow Step 2: Register and verify your nursery boundary (virtual fence)).
- If seedlings remain unsold (or not yet destroyed), sell or destroy them all before sowing again (follow the on-screen steps).
- Note: You need an internet connection to download the satellite basemap. If the nursery has no internet or 4G/5G, open aGreen Traceability while online, zoom and pan the basemap over the nursery area to cache it on the device, then you can register the boundary offline. Data created offline is stored on the device and syncs automatically when the network returns.
- Plan field work and logging for specific parcels in advance, the system tightly binds activities to the virtual fence.
- Note: Record sowing/sticking and care activities after finishing field work and before leaving the site.
3.1Open the activity log from the home screen
To start logging a sowing/sticking or care activity, from the Nurserier home screen tap the Raising button.
Nurserier home screen, tap Raising button 3.2Select a parcel on the map
The Nursery map shows parcels where sowing activities can be recorded. Tap and hold the parcel on the map for about 2 to 3 seconds.
If you choose 'Part of parcel', you split the parcel into smaller parts and sow or care for only one part. The split-map interface helps you do this. After splitting, continue with 'Whole parcel'.
Split part of a parcel on the map If you choose 'Whole parcel', you sow or care for the entire parcel and can then record the activity log.
Continue with whole parcel after splitting 3.3Sowing/sticking
When the parcel is bare land (harvested, all seedlings sold, or newly registered), you can only log Sowing/sticking;
Log sowing on bare land Choose 'Whole parcel' (after splitting if applicable) and tap AGREE to continue.
If the app asks, move inside the parcel (ideally near the centre) where you performed the sowing activity.
Move inside the parcel when the app requires Fill in the required information: propagation method (sowing or sticking), number of seedlings sown, expected days from sowing to sale, nursery notes, and take 1 to 2 geo-tagged field photos (time, coordinates and direction recorded automatically) as evidence. Then tap 'Register seedlings' to submit the sowing log to the blockchain.
Seedling registration form after sowing On success you receive a confirmation. Without internet, the app saves on the device and submits automatically when the network returns.
Sowing registration successful 3.4Care
Care activity logs (Fertilizing, Watering, Shading, Thinning, Root-ball turning) can only be recorded on parcels that already have sown seedlings (green or yellow on the Nursery map);
Choose 'Whole parcel' (after splitting if applicable) and tap AGREE to continue.
If the app asks, move inside the parcel (ideally near the centre) where you performed the sowing activity.
For 'Hardening' (tree stumping) only, you can log this activity when seedlings meet the minimum growth period defined by silvicultural logic in the database;
These logs can be recorded many times during the seedling growth cycle; all are saved to the Digital Passport and product lifecycle;
Illustration of fertilizing log:
Fertilizing log, step 1 
Fertilizing log, step 2 Illustration of root-ball turning log:
Root-ball turning log, step 1 
Root-ball turning log, step 2 Illustration of shading log:
Shading log, step 1 
Shading log, step 2 Illustration of hardening log:
Hardening log, step 1 
Hardening log, step 2 After a successful 'Hardening' log, the parcel becomes ready to sell seedlings or continue care (white border on the Nursery map). Tap AGREE to go to the sale log, or CANCEL to continue care logs for seedlings on this parcel.
After successful hardening, sell or continue care Detailed instructions
- Note: Record the sale log only after you have agreed on the quantity to buy and sell. aGreen Traceability does not manage or track price or payment amounts.
- The transaction is recorded on the ledger only when your seedling buyer taps confirm purchase on their device. Logs you recorded earlier (see Step 3) appear on your seedlings’ Digital Passport; after scanning the QR code, the buyer reads and checks the information and confirms the purchase.
- When seedlings are old enough to sell (you have logged 'Stumping' in the previous step), you can sell seedlings.
4.1Selling
Tap 'Sell' on the Nurserier home screen.
Nurserier home screen: Sell button Or tap AGREE on the notification on the Nursery map as guided.
Nursery map notification: tap AGREE to sell Or from Inventory management, open 'Seedling warehouse'.
Inventory management: Seedling warehouse On the map of a parcel with seedlings to sell, tap and hold inside the parcel boundary for about 2 seconds; the sale method options appear.
Tap and hold on map for sale method options If you choose 'Sell all', the app fills in all seedlings you still have in the nursery (not yet sold). This value cannot be edited.
Sell all, quantity auto-filled, not editable If you choose 'Sell part' (recommended), you can enter the number of seedlings you want to sell.
Sell part, enter quantity manually Take 1–2 photos of the seedlings in the transaction, then tap 'Create QR code'.
Photo seedlings and tap Create QR code Each QR code is single-use (one transaction per code) and waits up to 15 minutes. If no buyer scans your QR, or they scan but do not tap 'Confirm purchase' on their device, the seedling sale is not complete.
Sale QR code: single use, 15-minute window Detailed instructions
- Use the warehouse view to see available, sold, and returned quantities.
- Process returns or destroy/write-off flows when stock is lost or rejected.
- Keep records aligned with physical stock counts.
- Review pending sync banner if you worked offline.
Mobile App
Mobile: nursery warehouse and inventory
Account registration (applies to all Roles)
New users must register first (mobile app or https://trace.vnforest.org) before following the steps below.