How can I monitor the biomass of my field?

Crop monitoring is available in the YaraPlus web and mobile app. Once you've added your field, you can monitor changes in biomass over time using satellite-based maps.

Note: Biomass maps show relative crop growth and variability within a field. They don't measure yield and they're not a fertiliser recommendation on their own.

Watch the video or follow the steps below.

1) Open monitoring mode

1. Open YaraPlus Atfarm:
   • Web app: Hover over the sidebar to expand the menu and select Atfarm.
   • Mobile app: Tap Discover in the bottom bar, then select Open Atfarm.
2. Select the field you want to monitor:
   • Web app: Select the field from the left navigation bar.
   • Mobile app: Select Fields from the top navigation bar, then select the field from the list.
3. The field page opens with the latest biomass map.
4. Open monitoring mode:
   • Web app: Click Open monitoring mode.
   • Mobile app: Tap the expand icon on the map.

2) Select map type and date

Monitoring mode shows your field on a base map. You can switch between different satellite maps and biomass maps and view them for a specific date. In Central Europe, a new satellite image is usually available approximately every three to five days.

1. Select a map type:
   • Web app: In the bottom-left box, open the Satellite map type dropdown and select a map.
   • Mobile app: Swipe up the bottom sheet, then open the Satellite map type dropdown and select a map. 
   • Each biomass map uses a different colour scale (shown at the bottom) to display in-field variability.
   • If no crop type is assigned, Optimised map and N-uptake map are disabled. How to add a crop type
2. Select a map date:
   • Web app: In the bottom-left box, select a date under Satellite map date.
   • Mobile app: In the bottom sheet, select a date under Satellite map date.
   • Biomass maps require clear satellite imagery. A cloud detection algorithm filters out cloudy and snowy images, so you can only select clear images (marked with a 🔆 icon).
3. If there hasn't been a clear image for more than five days, you can estimate the biomass development using a cloud-free image from up to 21 days ago, based on weather and recent crop growth. Click Generate map to create a more recent map. How the estimation works

Tip: To switch to another field, select Change field (web) or tap the pen icon next to the field name (mobile).

3) Monitor biomass on the map

You can now view the selected map for the selected date. On mobile, swipe the bottom sheet down to see the map again.

• Move the map:
  • Web app: Click and hold, then drag.
  • Mobile app: Drag the map with your finger.
• Zoom in and out:
  • Web app: Use the mouse wheel or the + / - buttons.
  • Mobile app: Pinch to zoom.
• Adjust map transparency: Use the Map transparency slider to make the biomass overlay more transparent and check what's visible underneath.
  • Web app: Use the slider in the bottom-left box.
  • Mobile app: Swipe up the bottom sheet, then use the slider.

Want to compare biomass between fields and dates?

How to compare biomass