210 - Manual Rx Tool
Written by Regan Heine
Updated at July 21st, 2025
Table of Contents
What is the Manual Rx Function and how do I access it?
Manual Rx tool allows to create/edit almost any layer in your ops center contributed from VRAFY.
How to access Manual Rx
- Satellite Imagery
- Previous Rx map (from create Formula Rx Function
- Smooth Layer
- Edit Rates for each zone
- Add Test Strips
- Management Zones
- VRAFY complete or Add on service
Complete the Rx by performing the following:
- Selecting a product (note: multiple products can be added to the Rx)
- Include a product cost to calculate a total cost (not required)
- Choose a zoning method as well as smoothing and remove small regions as desired
- Click 'Run Rx'
- Assign rates to the zones
What do the difference Zone Types Mean?
Summary (i.e. I am not reading all that)
Generally, Jenks Natural Breaks is the Zone type you want to use. You can select however many zones you wish and is most often the best one. Below is the differences between all 7.
- Standard Deviation
Description:
Classifies data based on how much the values deviate from the mean of the dataset. Each zone represents a specific range of standard deviations from the mean. It is ideal for identifying outliers and highlighting variation from a central trend.
Size of Zone Intervals:
The value entered specifies the range around the mean. The smaller the number, the higher the number of zones and vice versa.
- Equal Interval
Description:
Divides the range of data values into equal-sized intervals. For example, if data ranges from 0 to 100 and you want five classes, each will cover a range of 20. Best for data that is evenly distributed.
Number of Zone Intervals:
The value entered specifies the number of equal divisions in the data and, therefore, the number of zones.
-Equal Area
Description:
Assigns classes so that each zone covers an equal physical area on the map, regardless of the distribution of data values.
Prioritizes geographic representation over data value representation.
Number of Zone Intervals:
The value entered specifies the number of zones desired. 
-Fixed Interval
Description:
Groups values within the dataset according to fixed thresholds. Similar to equal interval, but the interval size is predetermined by the user. Useful when comparing datasets using consistent classification, or when working with thresholds established by regulations or standards.
Size of Zone Intervals:
The value entered specifies the size of divisions in the data.
-Jenks Natural Breaks (Recommended)
Description:
Detects "natural" groupings or breaks in the data based on its distribution. It minimizes variance within classes and maximizes variance between classes. Useful for visualizing real-world patterns in skewed or uneven datasets and creates more meaningful zones when data is clustered.
Number of Zone Intervals:
The value entered specifies the number of zones desired.
-Custom Breaks
Description:
Groups data into manually specified classes. Allows users to define class boundaries based on field knowledge.
Breaks:
Values entered with commas in between determine the size and number of classes (ex. 50, 100, 150, 200, 250).
-Color Breaks
Description:
Replicates the visual of the unzoned base map. 
Creating Manual Rx from Satellite Imagery
Create Prescriptions from Satellite Imagery
Overview
This article covers the basics on the types of imagery and how to create a manual prescription from it. It includes an example of creating a prescription for 28% UAN Nitrogen application based on an in-season NDVI map, including a cost estimate.
Process
Chose the right Imagery Map
Click "Analysis" next to your preferred Field Name
Click this Dropdown Menu
Click a 'Crop Sensing' map and chose an Imagery lens.
Standard Imagery Lenses Available:
Standard Imagery Lenses Available:
NDVI: Industry Standard Vegetative Index
SVI: Similar to NDVI, another Vegetative Index
PCD: Plant Cell Density, shows bio-mass
Other Imagery Layers available upon request.
Creating the Prescription
Once you have the right Imagery map loaded
Click "Create Manual Rx"
This will load a new tab on your browser.
Choose from the list of Zoning Classifications. Standard Deviation is most commonly used, and the Default Value.
Choosing your Product
First select the desired product type.
There are different pre-loaded products for Fertilizers, Chemicals, Crop (Seed), or Tillage.
If your product isn't listed, you can add a custom product here.
Name your product
Click here if this is a liquid product.
Click "Add"
Click "Run Rx »"
Adding a Cost to your Prescription Map
You can assign a cost per application unit to your product here.
Assigning Prescription Rates.
Now assign a rate for each of the zones in the Classified zone map.
Click this number field.
Exporting the Prescription
Once you like the prescription, you are now ready to export.
You can either send the prescription to Operations Center, or if you have a JD Link Connected machine, you can send the prescription directly to the machine.
Click "Save Shapefiles"
Your computer will now download the shapefiles, also the prescription will load to Operations Center.
The Prescription is now available as a field layer.
Click "Planning"
Next click on the Product Prescription
View the Prescription here in Analyzer
If you need to re-download the Shapefiles, you can do that in the bottom menu.
If you have additional questions or you would like some assistance, feel free to call or text us at 507-800-0898 or schedule some time with one of our experts here: Schedule Meeting
From Management Zones (VRAFY Complete or Add-on)
Create a Manual Rx from Management Zones
Overview
This article will cover how management zones can be utilized to generate a prescription by assigning rates to each zone. It also shows how zones can be edited right from the Operations Center.
If you need management zones created in your fields, contact VRAFY to learn more about your options.
Process
If you have additional questions or you would like some assistance, feel free to call or text us at 507-800-0898 or schedule some time with one of our experts here: Schedule Meeting
Adding Test Strips in Manual Rx
Create Manual Prescriptions with Test Strips
Overview
Learn how to create a manual prescription based on satellite imagery and incorporate test strips of different rates into the prescription. This also showcases the ability to incorporate A-B lines from the Operations Center to match up with planter passes.
Note: Guidance Line matching is not currently compatible with Autopath - only straight track A-B lines, but custom headings can still be used to match planter heading.
Process
If you have additional questions or you would like some assistance, feel free to call or text us at 507-800-0898 or schedule some time with one of our experts here: Schedule Meeting
Smoothing a Rx Map
