# Calculating Liquid Fertilizer Application Rates per Acre

### Determining Nitrogen Content and Weight per Gallon

To accurately determine liquid fertilizer application rates per acre, several key factors must be established. Firstly, the percentage of nitrogen in the fertilizer must be ascertained. This information is typically provided on the fertilizer label. For instance, a liquid fertilizer with a nitrogen percentage of 10% indicates that 10% of the product comprises nitrogen.

### Key Facts

1. Determine the percentage of nitrogen in the fertilizer: The percentage of nitrogen is usually indicated on the fertilizer label. For example, if you have a liquid fertilizer with a nitrogen percentage of 10%, this means that 10% of the product is nitrogen.
2. Determine the weight per gallon of the fertilizer: The weight per gallon of the fertilizer is also provided on the fertilizer label. For instance, if the liquid fertilizer weighs 10.69 pounds per gallon, this is the weight you will use in the calculations.
3. Determine the desired amount of nitrogen to be applied per acre: This depends on your specific requirements and the needs of the crop or plants you are fertilizing. For example, if you want to apply 15 pounds of nitrogen per acre, this will be the target amount.
4. Calculate the pounds of nitrogen per gallon of fertilizer: Multiply the percentage of nitrogen in the fertilizer by the weight per gallon of the fertilizer. For example, if you have a liquid fertilizer with 10% nitrogen and it weighs 10.69 pounds per gallon, the calculation would be: 10% x 10.69 pounds = 1.069 pounds of nitrogen per gallon.
5. Calculate the gallons of fertilizer required per acre: Divide the desired amount of nitrogen to be applied per acre by the pounds of nitrogen per gallon of fertilizer. For example, if you want to apply 15 pounds of nitrogen per acre and the liquid fertilizer has 1.069 pounds of nitrogen per gallon, the calculation would be: 15 pounds ÷ 1.069 pounds = 14.03 gallons of fertilizer per acre.
6. Calculate the total gallons of fertilizer required for the entire field: Multiply the gallons of fertilizer required per acre by the total number of acres in the field. For example, if you have a 20-acre field and you need 14.03 gallons of fertilizer per acre, the calculation would be: 14.03 gallons x 20 acres = 280.6 gallons of fertilizer for the entire field.

It’s important to note that these calculations provide a general guideline, and actual application rates may vary depending on specific crop requirements, soil conditions, and other factors. Consulting with a Certified Crop Adviser (CCA) can provide more accurate recommendations tailored to your specific needs.

Secondly, the weight of the fertilizer per gallon must be determined. This is also usually specified on the fertilizer label. For example, if a liquid fertilizer weighs 10.69 pounds per gallon, this weight will be used in subsequent calculations.

### Calculating Nitrogen per Gallon and Required Gallons per Acre

The next step involves calculating the pounds of nitrogen per gallon of fertilizer. This is achieved by multiplying the percentage of nitrogen in the fertilizer by the weight per gallon of the fertilizer. For instance, if a liquid fertilizer contains 10% nitrogen and weighs 10.69 pounds per gallon, the calculation would be:

10% x 10.69 pounds = 1.069 pounds of nitrogen per gallon

Subsequently, the gallons of fertilizer required per acre must be calculated. This is done by dividing the desired amount of nitrogen to be applied per acre by the pounds of nitrogen per gallon of fertilizer. For example, if the goal is to apply 15 pounds of nitrogen per acre and the liquid fertilizer has 1.069 pounds of nitrogen per gallon, the calculation would be:

15 pounds ÷ 1.069 pounds = 14.03 gallons of fertilizer per acre

### Calculating Total Fertilizer Required for the Field

Finally, to determine the total gallons of fertilizer required for the entire field, the gallons of fertilizer required per acre must be multiplied by the total number of acres in the field. For instance, if a field spans 20 acres and requires 14.03 gallons of fertilizer per acre, the calculation would be:

14.03 gallons x 20 acres = 280.6 gallons of fertilizer for the entire field

### Considerations and Consulting Experts

It is important to note that these calculations provide a general guideline, and actual application rates may vary depending on specific crop requirements, soil conditions, and other factors. Consulting with a Certified Crop Adviser (CCA) can provide more accurate recommendations tailored to specific needs.

## FAQs

### How do I determine the percentage of nitrogen in my liquid fertilizer?

The percentage of nitrogen in your liquid fertilizer is typically indicated on the fertilizer label. Look for a value expressed as a percentage, such as 10% or 20%.

### How do I find the weight per gallon of my liquid fertilizer?

The weight per gallon of your liquid fertilizer is also usually provided on the fertilizer label. It may be labeled as “density” or “specific gravity.” The units will typically be in pounds per gallon.

### How do I calculate the pounds of nitrogen per gallon of my liquid fertilizer?

To calculate the pounds of nitrogen per gallon of your liquid fertilizer, multiply the percentage of nitrogen by the weight per gallon. For example, if your fertilizer has 10% nitrogen and weighs 10.69 pounds per gallon, the calculation would be:

10% x 10.69 pounds = 1.069 pounds of nitrogen per gallon

### How do I calculate the gallons of fertilizer required per acre?

To calculate the gallons of fertilizer required per acre, divide the desired amount of nitrogen to be applied per acre by the pounds of nitrogen per gallon of fertilizer. For example, if you want to apply 15 pounds of nitrogen per acre and your liquid fertilizer has 1.069 pounds of nitrogen per gallon, the calculation would be:

15 pounds ÷ 1.069 pounds = 14.03 gallons of fertilizer per acre

### How do I calculate the total gallons of fertilizer required for my entire field?

To calculate the total gallons of fertilizer required for your entire field, multiply the gallons of fertilizer required per acre by the total number of acres in your field. For example, if you have a 20-acre field and you need 14.03 gallons of fertilizer per acre, the calculation would be:

14.03 gallons x 20 acres = 280.6 gallons of fertilizer for the entire field

### Are these calculations exact, or are there other factors to consider?

These calculations provide a general guideline, and actual application rates may vary depending on specific crop requirements, soil conditions, and other factors. Consulting with a Certified Crop Adviser (CCA) can provide more accurate recommendations tailored to your specific needs.

### What safety precautions should I take when applying liquid fertilizer?

Always follow the safety instructions on the fertilizer label. Wear protective clothing, including gloves, goggles, and a respirator if necessary. Avoid contact with skin and eyes.

### How can I dispose of leftover liquid fertilizer safely?

Never pour leftover liquid fertilizer down the drain or into a body of water. Contact your local waste management authority for proper disposal instructions.