Editing Prescription Preferences

Here is an overview of what each of the options does in the Preferences Window and how to utilize them to customize the prescription to meet your unique needs!

Sawyer Hansen
16 steps
14 seconds

Vrafy

Tip! Wording and options may change from time to time as adjustments are made to improve or clarify, but the general layout and functionality will follow what is in this article.

Start from the "Formula Rx" button in Operation Center

Access the Preferences of any formula by clicking on "Prefs". In this example -we'll be discussing application of a dry fertilizer product(s).

Minimum Rates

**Minimum Rates** The minimum applied number for both options should be based on the minimum rate at which the application equipment can accurately apply. If you don't know what this level should be, contact your applicator or equipment dealer for help. **Option 1 "Min Rate":** The Minimum Rate forces the prescription to apply at least this amount across the whole field, regardless of what the formula calculates the rate to be. Use this number if you want every part of the field to be covered. **Option 2 "Switch Rate":** Two values are entered when the Switch Rate is selected.\ Rate 1: Anything below this rate will be applied at zero rate.\ Rate 2: Rate 2 should equal the minimum rate for your equipment. Any formula calculated values between Rate 1 and 2 will be applied at Rate 2. Any formula calculated values above Rate 2 will be applied at the calculated prescription rate. For this example, the switch rates are set at 25 and 75. If the formula calculates that 20 lbs of product is needed, it will not apply product there because it is below 25 lbs. If it calculates 30 lbs of product is needed, it will apply 75 lbs because it is between 25 and 75. Any areas requiring more than 75 lbs of product will receive the formula calculated rate from the prescription.

Example Switch Rates

Maximum Rates

**Maximum Rates** Similar to Minimum Rates, the maximum applied number for both options should be based on the maximum rate at which the application equipment can accurately apply. If you don't know what this level should be, contact your applicator or equipment dealer for help. **Option 1 "Max" Rate**: The Maximum Rate acts as a ceiling for the prescription. Any amount needed above this amount is essentially ignored. **Option 2 "Split By Max":** The number entered acts as a ceiling for the first prescription. Any amount above this level is rolled over into a new prescription. This can be useful for multi-bin setups or for applying a limited amount in-row and the rest as a broadcast. This second prescription is loaded under the following year in the Operations Center to make it easy to find. For example, if a Split by Max rate of 200 is entered and the formula calculates that 350 lbs of product is needed, the first prescription will set a rate for the max of 200, and a second prescription will automatically be created for the remaining rate of 150 lbs.

Split by %

**Split by %** Split by % allows you to split the prescription up into prescriptions based on the percentages entered here. This is useful for multi-bin applicators or seeders where you want both meters running the same product all the time.

Average Rate

**Average Rate** Enter the lbs of product per acre you want the prescription to average and it will adjust the prescription to that target. For example, if you have a budget of 150lbs of product per acre, you can enter 150 in the average rate and it will automatically adjust the prescription so the field averages about 150lbs.

Cost Per Unit

Cost $ per Unit

**Cost $ Per Unit** Enter a Cost in Dollars per Unit to see your prescription cost or if you want to run multiple scenarios and compare their costs. The cost you enter is based on the price per unit of output calculated. If desired, simply re-run the prescription formula and adjust the average rate (covered in step 10) to arrive at an acceptable overall prescription cost for your operation. Please Note: The price will be shown in reports and the legend table only in the Formula creation window. They will NOT carry over to the Operations Center. Most of our formulas calculate lbs per acre, so you will need to convert your cost to dollars per pound. For Example, if you purchase Potash for $600 per ton, just divide 600 by 2000 to get the value to enter. In this case, that is $0.30 per lb.

Flat Credit

**Flat Credit** A flat credit can be used to enter a credit for product already applied. It will subtract this amount from your prescription evenly across the entire field. **Important:** The flat credit is calculated as lbs of product, not pounds of nutrient. For example, if you want to credit your DAP application for the phosphorus put down with a 5 gallons per acre application of liquid 10-34-0 by the corn planter, you need to convert the 10-34-0 to lbs of DAP and enter a flat credit of 42 lbs per acre. Here's the Math:\ 10-34-0 is 11.6 lbs per gallon. \ 11.6 \* 5GPA \* 34% P2O5 = 20 lbs of P2O5\ 20lbs of P2O5 / 0.46 (analysis of DAP) = 42 lb flat credit

Once all your preferences are set, click Done.

You can now select your formula and create a Prescription customized to your preferences!