To create a soil sampling prescription map based on productivity zones:
To create a soil sampling prescription map based on productivity zones:
In the field card, click the 'Soil sampling map' button.
Set the settings for building the prescription map: the number of zones for taking samples or the size of each zone.
By default, we divide the field into zones like this:If the field's area is less than 10 hectares, each zone is 2 hectares.
If the field's area is between 10 and 30 hectares, each zone is 3 hectares.
If the field's area is between 30 and 50 hectares, each zone is 4 hectares.
For fields with areas larger than 50 hectares, each zone is 5 hectares.
Choose the numbering order for the zones
We recommend using four-digit numbers, where the first two digits represent the field number and the last two digits represent the zone number. This will help you avoid confusion when uploading results for multiple fields.
Note❗️
Use the recommended numbering order if you plan to upload the results of the soil test to OneSoil Pro to visualize them and build VRA maps based on the soil analysis results.
Choose zone complexity
This parameter indicates how much productivity zones affect the soil sample zones.
💡 When choosing the size of zones and their complexity, follow this rule: the preferable homogeneity within a zone is over 85%.
To check homogeneity, set the filling based on this criterion:If homogeneity is >90%, the zones will be filled with green. This is the desired indicator to aim for.
If homogeneity is between 85% and 90%, the zones will be filled with orange. Try adjusting the size of the zones or their complexity to achieve a value of >90%.
If homogeneity is <85%, the zones will be filled with red. Try adjusting the size of the zones or their complexity to achieve a value of >90%.
Download the file as a map in .shp format or as a PDF report. After that, you're ready to start working!
To create a soil sampling prescription map to match VRA Zones:
To create a soil sampling prescription map to match VRA Zones:
To build soil sampling prescription maps based on the original productivity zones, first click the create a soil sampling map and switch the 'Match with VRA zones' toggle. The algorithm will consider homogeneous productivity zones and their stability.
These zones will match our VRA input maps, allowing you to create multi-input maps later—for example, a map for fertilizing based on soil sampling and a map for planting based on productivity.
The “match with VRA zones” option in the OneSoil App generates a sampling map with one sample per zone: one for the high-productivity area, one for medium, one for low, etc — all cores from each productivity level mixed into a single sample.
Using this strategy you’re paying for fewer lab results and therefore can afford far deeper analysis of each: soil texture, organic matter, cation exchange capacity, total nutrient content, element balance. Fewer samples, more knowledge per sample.
When it works best: when one fairly uniform factor is limiting yield (pH is the classic case).
When it doesn't: if your low-productivity areas have different causes: a dry sandy hill here, a waterlogged spot there — mixing them into one sample hides exactly what you need to see.
To create a prescription map with sampling points:
To create a prescription map with sampling points:
In the field card, click the 'Soil sampling map' button.
Select the number of zones for taking samples, numbering order for zones, and zone complexity.
Enable the option to add sampling points to the map.
Mark the number of points within a zone so we can build the points automatically, or draw the points manually. Then specify buffer zone size (indent from the boundary).
Click the Edit Points button if you need to add or delete previously added points or change their position in the zone.
Export the map in .shp, .pdf, .kml or .gpx.
How to create and follow a route for soil sampling:
How to create and follow a route for soil sampling:
Once you have created your soil sampling map and added your sampling points, you can use the OneSoil Scouting app to create a route connecting the points and navigate to them directly in the field.
Follow these steps to create a route:
Open up your Soil Sampling map on your OneSoil Scouting App. For more information, Locating VRA maps on Mobile.
Navigate to Points and click on Sample Cores.
Follow the steps and select the first point to navigate.
Click start and follow the route until completed.
Once completed click on Finish to exit the map.
💡 Once the soil test results are ready, you can upload them to the 'Import files' tab for visualization and analysis. Check out this article for more details.
Need to create a map for soil sampling?
We’ve got a great tool for that!