Mixing Compost with Manure – How & Why

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At A Glance
Mixing compost with manure can significantly enrich the soil by adding a variety of essential nutrients and organic matter, promoting better soil structure, water retention, and microbial activity. While compost improves soil texture and provides a slow release of nutrients, manure can provide a more immediate nutrient boost, especially in nitrogen, which is essential for plant growth.

Composting is an excellent way to recycle organic waste and create nutrient-rich soil for your garden. However, when it comes to composting, many people wonder if they can mix compost with manure. The answer is yes, you can mix compost with manure, and it can be a great way to improve the quality of your soil.

Composting manure is an effective way to reduce the levels of harmful bacteria and pathogens that may be present in fresh manure. The composting process generates heat, which helps to kill off any harmful bacteria and pathogens. Once the composting process is complete, the resulting material is safe to use in your garden.

When mixing compost with manure, it’s important to keep in mind that manure is a rich source of nitrogen, while compost is a more balanced source of nutrients. Therefore, you should aim to mix the two in a ratio of around 1 part manure to 2-3 parts compost. This will ensure that your soil receives a balanced mix of nutrients that will promote healthy plant growth.

Understanding Compost and Manure

Definition of Compost

Compost is a nutrient-rich organic matter that is created by decomposing organic materials such as leaves, grass, food scraps, and other plant-based materials. The process of composting involves the breaking down of these organic materials by microorganisms, which results in a dark, crumbly substance that is rich in nutrients and beneficial microorganisms. Compost is often referred to as “black gold” because of its ability to improve soil health and fertility.

Definition of Manure

Manure is a natural fertilizer that is created by the decomposition of animal waste. It is rich in nutrients such as nitrogen, phosphorus, and potassium, which are essential for plant growth. Manure can come from a variety of sources, including cows, horses, chickens, and other livestock. It is often used as a soil amendment to improve soil fertility and structure.

When it comes to gardening and farming, both compost and manure are essential for maintaining healthy soil and growing healthy plants. While they are both organic matter, there are some key differences between the two that are important to understand.

Compost is created by decomposing plant-based materials, while manure is created by decomposing animal waste. Compost is often more balanced in terms of nutrients, while manure can be high in certain nutrients, such as nitrogen. Manure can also contain pathogens and weed seeds, which can be harmful to plants if not properly composted.

Overall, both compost and manure have their benefits and drawbacks, and the decision of whether to use one or the other (or both) depends on the specific needs of your garden or farm. In the next sections, we will explore the benefits and drawbacks of each in more detail.

The Process of Composting Manure

Composting manure is a simple process that can be done by anyone with a little bit of knowledge and the right tools. In this section, I will explain the two main methods of composting manure, hot composting and regular composting, and provide some tips on how to do it successfully.

Hot Composting

Hot composting is a method of composting that involves maintaining a high temperature throughout the composting process. This method is ideal for composting manure because it helps to kill any pathogens that may be present in the manure.

To start hot composting, you will need to create a compost pile that is at least 3 feet tall and 3 feet wide. The pile should be made up of a mixture of manure, straw, and other organic materials. You will also need to add water to the pile to keep it moist.

Once you have created your compost pile, you will need to monitor the temperature of the pile regularly. You can do this using a compost thermometer. The temperature of the pile should be between 130 and 150 degrees Fahrenheit. If the temperature drops below this range, you will need to add more organic material to the pile to keep it hot.

Composting Method

The other method of composting manure is the regular composting method. This method is less intensive than hot composting and does not require as much monitoring.

To start regular composting, you will need to create a compost pile that is at least 3 feet tall and 3 feet wide. The pile should be made up of a mixture of manure, straw, and other organic materials. You will also need to add water to the pile to keep it moist.

Unlike hot composting, you do not need to monitor the temperature of the pile regularly. However, you will need to turn the pile every few weeks to ensure that the compost is being evenly distributed.

In both methods of composting, it is important to maintain the right balance of oxygen, temperature, and moisture. Too much moisture can lead to a smelly, slimy pile, while too little moisture can slow down the composting process. Additionally, a lack of oxygen can cause the pile to become anaerobic, which can lead to the production of harmful gases.

Overall, composting manure is an effective way to create nutrient-rich soil for your garden. By following these simple steps, you can create compost that is safe and beneficial for your plants.

Benefits of Mixing Compost with Manure

As an avid gardener, I have found that mixing compost with manure can have numerous benefits for soil health. Here are a few reasons why:

Nutrient Rich Soil

Composting with manure can greatly improve the nutrient content of the soil. Manure is rich in nitrogen, phosphorus, potassium, and other essential nutrients that plants need to thrive. By mixing manure with compost, you can create a nutrient-dense soil that will help your plants grow strong and healthy.

Improved Soil Structure

In addition to providing essential nutrients, mixing compost with manure can also improve soil structure. Compost is rich in organic matter, which helps to loosen compacted soil and improve water retention. Manure, on the other hand, can help to add weight and structure to sandy soil. When combined, these two materials can create a soil that is both nutrient-rich and well-structured.

Overall, mixing compost with manure is a great way to improve the health of your soil and promote healthy plant growth. Whether you are an organic gardener or simply looking for ways to improve your soil, composting with manure is a great place to start.

Types of Manure for Composting

When it comes to composting, not all manure is created equal. Different types of manure have different nutrient levels, which can affect the health of your plants. Here are some of the most common types of manure used in composting:

Cow Manure

Cow manure is one of the most popular types of manure for composting. It is rich in nitrogen, which is essential for plant growth. Cow manure also contains phosphorus and potassium, as well as other micronutrients that plants need. However, it is important to note that cow manure can be “hot,” meaning that it can contain high levels of nutrients that can burn plants if not used properly.

Horse Manure

Horse manure is another popular type of manure for composting. It is also rich in nitrogen, but it has a lower nutrient content than cow manure. Horse manure is also less likely to be “hot,” making it a good choice for composting beginners.

Chicken Manure

Chicken manure is one of the most nutrient-rich types of manure, with high levels of nitrogen, phosphorus, and potassium. However, it is important to compost chicken manure before using it in the garden, as fresh chicken manure can be too high in nitrogen and can burn plants.

Sheep Manure

Sheep manure is a good source of nitrogen, phosphorus, and potassium, but it has a lower nutrient content than some other types of manure. It is also less likely to be “hot,” making it a good choice for composting beginners.

Rabbit Manure

Rabbit manure is a great source of nitrogen, phosphorus, and potassium, and it is less likely to be “hot” than some other types of manure. It is also less likely to contain weed seeds, making it a good choice for organic gardeners.

Bat Guano

Bat guano is a highly prized fertilizer for organic gardeners, as it is rich in nitrogen, phosphorus, and potassium, as well as other micronutrients. However, it can be difficult to find and expensive to purchase.

In conclusion, there are many types of manure that can be used for composting, each with its own set of benefits and drawbacks. When choosing a type of manure for your compost, consider the nutrient content, the likelihood of it being “hot,” and any other factors that may be important to you.

Concerns and Precautions

When mixing compost with manure, there are several concerns and precautions to keep in mind. Here are some of the main issues to consider:

Pathogens

Manure can contain harmful pathogens such as E. coli and salmonella, which can cause serious illness in humans. It’s important to make sure that any manure you use has been properly composted to reduce the risk of contamination. Aged manure is not the same as composted manure and should not be used as a substitute.

Weed Seeds

Manure can also contain weed seeds, which can lead to weed problems in your garden. To minimize this risk, make sure that any manure you use has been properly composted to kill weed seeds.

Heavy Metals

Manure can sometimes contain heavy metals, which can be harmful to plants and humans. If you’re using manure from animals that have been treated with antibiotics or other medications, there’s a risk that those substances could end up in your compost and ultimately in your garden. To minimize this risk, make sure that any manure you use comes from animals that have not been treated with medications.

Burning Plants

If you mix too much manure into your compost, it can create a high concentration of nitrogen, which can burn your plants. To avoid this, make sure that you’re using the right ratio of manure to compost.

To protect yourself when handling manure, it’s a good idea to wear gloves and wash your hands thoroughly after handling it. By taking these precautions, you can safely mix compost with manure to create a nutrient-rich soil amendment for your garden.

Application of Compost Manure

As a gardener, I often wonder if it is safe to mix compost with manure. The answer is yes! Composted manure is an excellent source of nutrients for your garden soil. It works as a slow-release fertilizer, keeping soil moisture consistent and insulating the soil.

In the Garden

In the garden, you can apply composted manure in the fall or early spring. Spread a two- to three-inch layer of composted manure over the surface of the soil. Keep it a good three to four inches away from shrubs or tree trunks. Once the garden is planted, avoid using animal manures unless they have been pasteurized or actively composted. Never use cat, dog, or pig manure in your compost pile or your vegetable garden. These manures are more likely to contain parasites that infect humans than other manures.

In the Crop Field

In the crop field, long-term, sustainable applications of manure and manure-based composts depend on the soil fertility levels of a garden or field through a soil test. Understanding the nutrient, pH, and salinity levels of the manure or compost to be applied is also crucial. Over-application can lead to excess nutrients that reduce crop growth, contaminate water, and contribute to environmental problems.

To calculate the application rate, crop P needs can be divided by PAP (plant available phosphorus). The application rate (in tons per acre) = Crop P needs ÷ PAP. If the compost analysis reports phosphorus as “P,” you can convert it to P2O5 by multiplying by 2.29. 80% of total P is plant-available.

In raised beds, you can use composted manure to improve the soil. Mix it into the top six inches of soil before planting. You can also use composted manure as a mulch by spreading it over the soil surface around plants.

Overall, composted manure is a great way to amend soil and provide essential nutrients for your garden or crop field.

Additional Composting Materials

When composting with manure, it’s important to include additional materials to balance the carbon-to-nitrogen ratio and create a nutrient-rich soil amendment. Here are some common additional materials to consider:

Straw

Straw is a great addition to compost piles, as it’s high in carbon and helps balance the nitrogen-rich manure. It also helps create air pockets in the pile, allowing for better aeration and faster decomposition. When adding straw to the pile, aim for a ratio of about 3 parts straw to 1 part manure.

Grass

Grass clippings are another great addition to compost piles, as they’re high in nitrogen and help balance the carbon-rich manure. They also break down quickly, making them a great choice for those looking to speed up the composting process. When adding grass clippings to the pile, aim for a ratio of about 1 part grass to 2 parts manure.

Sawdust

Sawdust is a good addition to compost piles, but it should be used sparingly as it’s very high in carbon and can throw off the carbon-to-nitrogen ratio. When adding sawdust to the pile, aim for a ratio of about 1 part sawdust to 3 parts manure.

When composting with additional materials, it’s important to maintain a proper balance of carbon and nitrogen. Too much carbon can slow down the decomposition process, while too much nitrogen can create an unpleasant odor. Aim for a ratio of about 30 parts carbon to 1 part nitrogen for optimal results.

Remember, composting is a natural process that takes time. Be patient and allow the pile to decompose fully before using it in your garden.

Conclusion

In conclusion, mixing compost with manure can be a great way to improve soil quality and provide your plants with the nutrients they need to grow strong and healthy. Composting manure helps to break down any harmful pathogens and weed seeds, while also increasing the nutrient content of the soil.

However, it’s important to take the necessary precautions when using manure in your compost. Make sure that the manure is fully composted and has reached a temperature of at least 140°F to ensure that any harmful bacteria and pathogens have been killed off. Additionally, avoid using manure from carnivorous animals such as cats and dogs, as well as pigs, as these types of manure are more likely to contain harmful pathogens.

When mixing compost with manure, aim for a ratio of about 3 parts compost to 1 part manure. This will ensure that the soil is enriched with the nutrients it needs without being overloaded with too much nitrogen, which can lead to excessive growth and weak plants.

Overall, mixing compost with manure can be a great way to improve soil quality and provide your plants with the nutrients they need to thrive. Just be sure to take the necessary precautions and use the right ratios to ensure success.