We've set up several thousand trials using VRA technology since 2011. The accumulated experience allowed us to determine our own effective method for conducting experiments and evaluating their effectiveness. We've detailed how the most exciting cases went and their results on our blog.


In this section, we'll tell you how to create VRA maps and choose varying rates for different productivity zones. VRA will help you save on resources and increase yield.

🌱 To create a VRA prescription map for planting:

  1. Click the 'Create a map' button on the report page. Select the type of VRA map ('Planting').

  2. Specify a crop and variety/hybrid if you haven't already. Input the standard seeding rate and select your preferred unit system (kg/ha or seeds/ha). The seed manufacturer has a standard seeding rate recommendation, but you can also rely on your prior experience.

  3. Select the number of productivity zones. Note that 3 zones are better for building control strips. Control strips are necessary to properly interpret the trial results. We'll talk more about them later.

  4. Specify the rates for high- and low-productivity zones. If you know how yield varies within this field, follow this rule of thumb: the more heterogeneous the field is, the bigger the gap should be in the low- and high-productivity zones.

  5. Go to the 'Control strips' tab. This step is necessary to set a trial and interpret its results properly. If you don't want to set a trial, you can download a VRA map in the 'Download' tab.

🚜 To create a VRA map for fertilizing:

  1. Click the 'Create a map' button on the report page. Select the type of VRA map ('Fertilizer application').

  2. Specify a crop and variety/hybrid if you haven't already. Input the standard seeding rate and select your preferred unit system (kg/ha or seeds/ha). The manufacturer recommends a standard rate, but you can also go off your prior experience.

  3. Select the number of productivity zones. Note that 3 zones are better for building control strips and properly interpreting the results. Control strips are necessary to properly interpret the trial results. We'll talk more about them later.

  4. Specify the rates for high- and low-productivity zones. If you know how yield varies within this field, follow this rule of thumb: the more heterogeneous the field is, the bigger the gap should be in the low- and high-productivity zones.

  5. Go to the 'Control strips' tab. This step is necessary to set a trial and interpret its results properly. If you don't want to set a trial, you can download a VRA map in the 'Download' tab.

🛡 To create a VRA map for plant protection products:

  1. Click the 'Create a map' button on the report page. Select the type of VRA map ('Crop protection products').

  2. Specify a crop and variety/hybrid if you haven't already. Specify the input's type and name, the standard rate, and your preferred unit system. The manufacturer offers a recommended standard rate, but you can also go off your prior experience.

  3. If you're using productivity zones, select how many there are. Note that 3 zones are better for building control strips and properly interpreting the results.

  4. Specify the rates for high- and low-productivity zones. If you know how yield varies within this field, follow this rule of thumb: the more heterogeneous the field is, the bigger the gap should be in the low- and high-productivity zones.

  5. Go to the 'Control strips' tab. This step is necessary to set a trial and interpret its results properly. If you don't want to set a trial, you can download a VRA map in the 'Download' tab.


Building a map is the first step in setting up a trial. We're trying to find out how different rates affect yield in each productivity zone. To do that, we need to build control strips. This will provide you with insights into which zone(s) requires more seeds or fertilizer, and which zone(s) can have less.

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