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How To Calculate Liquid Fertilizer Rates

You need to know how to calculate liquid fertilizer rates using formulas, and not just how to measure fertilizers. Remember that fertilizers will only be able to do their job well if you use them appropriately for your garden and plants. One can assume that fertilizer application will only be optimal if you know the correct rate and measurement. 

More so, proper fertilizer management plays a significant impact on the environment and other living things close to the area. Those who need to use liquid fertilizer can do basic calculations to determine the rate themselves. And as time goes on, you can get used to the concepts, making rate calculations almost like second nature. 


How To Calculate Liquid Fertilizer Rates

Comprehensive Guide On How To Calculate Liquid Fertilizer Rates


Step #1. Understand the formula

The first step in calculating liquid fertilizer rates is understanding the formula. It might be overwhelming to read the formula upon a glance, but it is straightforward. Over time, you’ll get comfortable in inserting the values. For example, read the label to find the N-P2O5-K2O content of your fertilizer. 

You’ll also need to do a soil test, which is crucial before handling fertilizers. This will let you know your target rate and use the ideal fertilizer that will provide your plants’ needs. The third part of the formula is the total area of where you’ll use the fertilizer, which is self-explanatory. 

And lastly, what differentiates a liquid fertilizer rate from other rates is that you’ll also need to know the material’s density or weight. This is applicable only if you’re using a liquid fertilizer. Understanding these four values will help you apply the formula and calculate it without issues. 


Step #2. Apply the formula


Example #1.

To further help you understand the formula, let us use an example of calculating the liquid nitrogen fertilizer rate for a crop like corn. Using the formula, you will find the N application rate in gallons per acre and the amount you’ll need to apply 160 pounds of N on the area. You will need the values mentioned earlier, which means you should be aware that a 30% UAN liquid N fertilizer will suffice for 500 acres of corn. 

In this example, 10.86 pounds per gallon of fertilizer contains 30% nitrogen, which means you’ll get 0.30 pounds of N per pound of the fertilizer. One can simplify the calculation as 10.86 pounds per gallon multiplied by 0.30 pound Nitrogen per pound of fertilizer, and you’ll get the pound of N per gallon of fertilizer. 

You will also get the gallon of UAN per acre by dividing 160 by the amount you’ve had previously. Using the values from the previous two computations, you can get the tons for 500 acres. Overall, the calculation for liquid fertilizer rate is similar to how you’d compute the rate of dry fertilizers. 

Still, you’ll also account for the liquid fertilizer’s weight to find out its nutrient content.


Example #2.

If you’re still confused with using and applying the formula, a simplified equation would be multiplying the required nutrient application rate by 100 and dividing it by the percent nutrient in the fertilizer multiplied by the fertilizer weight. Let’s say that you need to apply 15 pounds of nitrogen using a liquid fertilizer with 30% nitrogen per weight, and the weight of UAN is 10.86 pounds per gallon. How can you use the formula?

You’ll get the fertilizer rate first, which means multiplying 15 by 100 and dividing it by 30. You’ll then get 50 pounds, and you’ll divide this by 10.86. Therefore, you will need 4.6 gallons of liquid fertilizer. 


How To Calculate Nutrient Requirements

Besides the liquid fertlizer rate, you also want to know how to calculate the nutrient requirements. Remember that you will only get the fertilizer’s correct rate if you know the crop nutrient requirements. Therefore, do a soil test first to ensure that you’ll meet the goals of your garden’s productivity. 

Remember that over time, the nutrients in the soil gets depleted. Some nutrients require a yearly application, while others require more frequent addition. An annual application of phosphorus and potassium should suffice, but nitrogen might be more periodic. 

If you’re growing in the greenhouse, you also need to adjust the amounts because the fertilizer recommendations are commonly used for large areas. You don’t want to guess the amounts due to the risk of over-fertilizing and under-fertilizing. You can use a simple equation of pounds recommended per 1000 square feet multiplied by square footage divided by 1000 square feet. 



Knowing and calculating fertilizer rates is crucial to avoid over-fertilizing and under-fertilizing. You can learn how to calculate liquid fertilizer rates by understanding the formula and how to apply the values. While it can be daunting to see how lengthy the formula is, it’s straightforward. 

One can simplify it into the required nutrient application rate multiplied by 100 and divided by the percent nutrient in fertilizer multiplied by the fertilizer weight. You’ll be taking the liquid fertilizer’s weight into account because this pertains to its nutrient content. Additionally, don’t forget the importance of soil test before calculations because it will ensure your plants’ fertilizer needs and avoid problems. 

With a proper understanding of the values and the formula itself, you should be able to calculate the rate of your liquid fertilizer without confusion. You can check out different examples from university extensions as well. 


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How To Care For Carpet Roses. 3 Factors To Master

How To Care For Carpet Roses. 3 Factors To Master

You have three factors to consider to know how to care for carpet roses. Gone are the days where roses are only centerpieces, but with proper care and maintenance, you might have one of the best groundcover plants. Carpet roses will undoubtedly improve any garden bed, and you’ll be pleased how they are not even demanding constant attention. 

If you want to protect your plants from challenging environmental conditions, you can also consider growing carpet roses in the greenhouse. This will make maintenance more comfortable, and you should face fewer challenges and problems. This article will teach you the ideal conditions and practices to keep your carpet roses blooming happily. 


In general, carpet roses are easy to grow and are relatively low-maintenance. However, the emphasis is necessary on knowing the variety you have and adjusting the plants’ practices and requirements accordingly. 


Factor #1. Location

The first consideration to ensure proper care for carpet or groundcover roses is in the ideal growing environment. Remember that even though groundcover roses are not picky in sites, they should still be in an optimal location to thrive. You can determine the ideal location of your carpet roses depending on their type

For example, some groundcover roses prefer full sun, but others will thrive in partial sun. You also want to plant them in well-draining soil because these plants are prone to drowning. After ticking these boxes, allocate enough space for the carpet roses to keep them from getting overcrowded that can cause problems over time. 


Factor #2. Maintenance

The second factor when caring for carpet roses is the practices in maintaining them. To start, remember that it’s crucial to plant them in a well-draining area. Overwatering the plants or leaving them in standing water can drown the plants or encourage root rot. Always check the ground if the roses need watering and amend the soil to improve its structure.

Carpet roses will also benefit from fertilizers. You can boost the plants and encourage them to fully cover the ground by feeding above and below the roses. Check the label instructions of your fertilizer and put your plants on a schedule for fertilizing regularly. 

Do you prune carpet roses? Depending on what type you have, some roses will benefit from pruning. You can cut the stems after flowering to keep the roses from overgrowing their area and maintain a tidy look. 


Factor #3. Common problems

Carpet roses, much like other groundcover plants, are prone to pests because of the large surface area they have. Therefore, prevention is vital to keep the pest population at bay. Gardeners often use insect spray or fungicides on the carpet roses to keep off insects or fungi. 

You can also practice preventative measures such as isolation of new plants and immediately removing plants with pests or diseases to prevent the spread. Always practice proper hygiene and sanitation to avoid bringing pests into the area. More so, maintain the ideal environment to discourage insects’ reproduction like aphids or the development of diseases like powdery mildew. 

Unlike other groundcover plants, carpet roses don’t have enough foliage to smother weed. Therefore, you want to use landscape fabric with drip irrigation on top to deter weed growth. You can also mulch under the systems or add a pre-emergent herbicide in early spring or fall to manage weeds.



How To Grow Carpet Roses

You can propagate carpet roses by rooting sections of the stem of a parent plant. Carpet roses typically develop rooted stems in spring or fall that you can dig up and repot. However, remember that the best propagation method will vary on the type of roses you have, 

You may also purchase potted ground cover roses, and you can transplant them in a bigger container or onto the ground outdoors. You can again grow bare-root carpet roses after the frost in the garden the same way you would when planting other roses. Amend the soil with organic matter and water the plants after putting and firming them in place. 

Because of their low-growing habit, you can have many uses for carpet roses. You can use them as borders or barriers for paths and driveways, add texture to a slope or wall, or fill a bed in the garden. However, be prepared that these plants can become leafless during the dormant season. 



One of the best groundcover plants to consider is carpet roses. However, you must know how to care for carpet roses to keep them healthy and looking tidy. To start, grow them in an ideal location to lessen the chances of developing drawbacks and problems. 

You can check the type of roses you have to know where is the best place to grow them. Once you have ensured the ideal location, maintain your plants by watering and fertilizing regularly. Be mindful not to overwater your plants as this can drown them, and you can also boost growth by feeding according to the label. 

You can also keep the roses from overgrowing their space by pruning after the flowering season. Lastly, do the necessary preventative measures to keep the roses from acquiring pests and diseases. Use fungicide or insect spray to keep fungi and pests at bay and maintain stable conditions to discourage growth and spread. 

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