Precision Fertilizing: Finally as Simple as You’ve Always Wanted

Every farmer knows their fields aren’t uniform—you know exactly where the soil is deep and hungry, and where the gravelly patches will never produce a record crop, no matter how much nitrogen you throw at them. Fertilizing used to be a game of averages  - you picked a rate for the whole field and hoped for the best. But a field is not a single unit; it’s a mosaic. Treating it like one costs you money in two ways: you waste expensive inputs on areas that can’t use them, and you starve the high-potential zones that are ready to break yield records.

The challenge has never been a lack of knowledge—it’s been the effort required to act on it. That’s why we’ve stripped away the complexity to give you a precision fertilizing workflow that is finally as simple as you’ve always wanted.

The VRA Advantage: Why Precision is Just Common Sense

You wouldn’t put the same amount of fuel into a small tractor as you would into a high-horsepower machine—it’s about matching the energy to the capacity. Variable Rate Application (VRA) is the same logic applied to your soil. It’s simply the common-sense way to make sure every kilogram of fertilizer has a job to do, based on what that specific part of the field can actually handle.

  • Don’t Waste: Cut back on shallow, unproductive spots where extra fertilizer just washes away.
  • Don’t Starve: Feed your best soil the nutrients it needs to break your yield records.
  • Don’t Worry: Reduce lodging and harvest headaches by avoiding “averages” that don’t fit anyone.
  • Even out: Support lagging zones that still have the potential to catch up. By giving these areas a targeted boost, you create a more uniform crop that ripens at the same time.

See how this logic looks in action in our Case Study on Winter Wheat Spring Regeneration.

New Guided Mode: From Field to Map in Minutes 

We’ve listened to your feedback. You’re busy, and you don’t have time for complicated software. Our new Guided Mode makes creating a prescription map faster and more intuitive than ever, giving you full control over the final doses. Click here to watch a short video showing how to create a VRA prescription map.

1. Group Your Fields  

Start by choosing your crop and your preferred unit (kg/ha or l/ha). The best part? You can now select multiple fields at once. If you have five fields of winter wheat requiring the same treatment, you can generate all those prescription maps in one single workflow.

2. Choose Your Data Source

  • Productivity Potential: Your field’s “long-term memory.” It uses years of satellite history to highlight consistent strong and weak zones. This is perfect for your first pass.

  • Current Satellite Biomass: This is your “live” view of the canopy. Use this during the growing season to respond to how the crop is performing right now.

3. Select Your Strategy 

This is where your knowledge comes in. Decide where the fertilizer goes based on your goals: 

  • Support Strong Zones: Apply more in your best areas where plants are best equipped to transform nutrients into yield.
  • Support Weak Zones: Use higher rates to help a lagging stand “fill in,” provided the soil is productive enough to handle the extra input.

4. Match Your Machinery 

Precision only works if your spreader can execute it. Choose between 2–5 zones and adjust the “Detail Level” to smooth out small areas, making the map easy for your machinery to follow. CultiWise exports to both Shapefile and ISO-XML, working seamlessly with brands like Amazone, John Deere, Trimble, and many more.

5. The Final Preview & Manual Override

Simply enter your desired average rate. You remain the boss: if you disagree with a specific zone, you can manually override the dose. You’ll see the exact total fertilizer amount needed, making loading your spreader a simple task.

What if it’s Cloudy? 

If the spring weather won’t cooperate and clouds block the satellites for a week or more, your schedule doesn’t have to stop. You can fly a drone at 120 m to create a multispectral drone image, upload it to CultiWise, and generate even higher-resolution maps. You never miss a critical window.

Variable rate fertilizing shouldn’t be a “high-tech” headache. It’s the most logical way to manage your farm. With Guided Mode, the technology stays out of your way so you can focus on a successful harvest.

Ready to see how simple it is?

Log in to CultiWise and create your first map today. If you need a second pair of eyes on your strategy, click the Live Chat—you’ll be talking to our team, not a bot.