Horse Manure Management: Collection, Storage and Composting

By Dr Duncan Houston

A tidy stable can still have an unsolved manure problem behind it. Moving waste into a growing heap is only the first part of the job. You also need somewhere suitable to store it and a dependable plan for what happens next.

Good manure management connects daily collection, storage, composting or removal, and appropriate land use. The right system depends on your horses, bedding, available space, equipment and local conditions.

Quick Answer

Collect manure and soiled bedding regularly, keep storage away from water pathways, and decide how the material will be used or removed before the pile becomes unmanageable. Composting requires active management rather than simply leaving waste in a heap. Match any land application to soil and crop needs, with advice appropriate to your property and local requirements.

Start with the amount you actually handle

Your waste stream includes more than droppings. Soiled bedding, urine-soaked material and the way stalls are cleaned all affect the volume that needs moving. Two properties with the same number of horses can produce very different loads of stall waste.

For a practical starting record, note how many barrow or loader loads leave the stable over a normal week, how much bedding is included and how often the storage area is emptied. Repeat the observation when turnout or weather changes. These records are more useful for planning your own storage than treating a general published average as an exact figure.

The Cooperative Extension overview of horse manure management explains how bedding changes both waste volume and nutrient value. Keep the collection route workable: awkward lifting, blocked gates and muddy access can make an otherwise sensible plan difficult to maintain.

Choose an end destination before designing the pile

Consider three questions: can you use the material responsibly on your land, can you manage composting, and is there a reliable collection service or recipient? Your answer determines the storage and equipment you need.

• Off-site collection: useful where land, equipment or time is limited. Confirm accepted materials, collection arrangements and what happens if a pickup is delayed.
• Managed composting: useful when you can monitor the process and have a suitable destination for the finished material.
• Land application: requires suitable land and a nutrient plan. Having an empty paddock does not establish that it needs more manure.

The University of Minnesota's manure guidance includes collection services and storage options as well as composting. Compare the labour, equipment, access and hauling involved in each option, rather than judging only by the price of a bin or spreader.

Keep daily collection predictable

Build manure removal into the ordinary care routine. Identify who collects from stalls, yards and regularly used paddock areas, where the waste goes and who checks supplies or equipment. A short written arrangement is especially useful when several people share the work.

Keep obvious rubbish separate from stall waste. Check what your chosen composting process or collection service accepts, including the bedding material. A recipient expecting clean horse manure may not accept a mixture containing plastic, baling twine or other waste.

Review the route during bad weather. If the collection vehicle cannot reach the storage area or the barrow route becomes unusable, the plan needs an alternative before waste backs up around the stable.

Store manure with water movement in mind

A convenient corner is not automatically a suitable storage site. Consider where rainwater travels, nearby waterways and wells, the ground conditions, neighbouring properties and access for removal. Observe the area after rain as well as in dry weather.

Both Minnesota and Cooperative Extension guidance emphasise site-specific storage design and local advice. Before constructing a permanent facility, check the relevant planning and environmental requirements with the responsible local authority. There is no single setback distance or storage design that this article can apply to every property.

Ask an agricultural adviser to help you distinguish clean water that can be kept away from the pile from water that has contacted manure and needs appropriate management. Covering a pile can help limit excess moisture, but the cover is only one part of the storage arrangement.

Understand what composting involves

Composting is managed decomposition. Air, moisture, the mixture of materials and temperature influence how it progresses. A stockpile may slowly break down, but that does not mean it has completed a controlled composting process.

Good composting can:

• reduce manure volume
• kill many parasite eggs and pathogens
• reduce odor
• create a more stable soil amendment

Those benefits depend on the process. Use an established system suited to your material and conditions, record its monitoring and follow local agricultural guidance. A dark appearance or a single warm thermometer reading does not document how the whole batch was managed.

Oklahoma State University's small-farm system distinguishes active composting from the later curing stage. Its example also shows why freshly added material and older curing material need to be tracked separately. Different systems operate differently, so use one coherent plan rather than combining isolated instructions from several designs.

Before choosing composting, decide who will check it, how fresh additions will be identified, and where finished material will go. If you cannot maintain those tasks, organised collection may be more practical.

Use nutrients where they are needed

Manure supplies nutrients, including nitrogen, phosphorus and potassium. The amount varies with the material. Soil testing, manure analysis and the intended crop help determine whether the land needs those nutrients and how much can be used appropriately.

Keep these precautions central to the plan:

• avoid overloading one area
• do not spread near waterways, dams, or wells
• avoid spreading raw manure on horse grazing paddocks
• use it where nutrient application is actually useful

Timing matters too. Frozen, waterlogged ground and forecast heavy rain can make application unsuitable. Discuss local conditions with an agricultural adviser rather than spreading simply because storage is full. Include a backup removal option for periods when application is not workable.

Protect the stable environment

Poorly managed manure contributes to ammonia and airborne irritants, especially in enclosed barns.

That can lead to:

• respiratory irritation
• poorer air quality
• increased stress on horses with existing airway disease
• a less healthy environment for people working in the barn

Ventilation and regular mucking matter a lot here.

The University of Minnesota's ventilation guidance explains the role of fresh-air exchange in removing moisture and airborne contaminants. A manure plan should work alongside the building's ventilation arrangements, with persistent facility problems assessed by someone with appropriate expertise.

Keep parasite and disease context in the plan

Manure is a major part of parasite and disease management on horse farms.

If left unmanaged, it can increase exposure to:

• intestinal parasites
• bacterial contamination
• protozoal organisms
• reinfection cycles on pasture

Good manure removal, composting, and pasture management all work together to reduce this pressure.

Record waste-handling arrangements alongside the rest of the property's care information. When veterinary or agricultural advisers review the property, knowing where waste is collected, stored and spread gives them useful context.

Write a plan you can keep using

1. Map the route: collection areas, storage, access and final destination.
2. Record the workload: typical loads and seasonal changes.
3. Assign responsibility: daily collection, compost checks, bookings and maintenance.
4. Confirm local advice: storage siting, nutrient use and environmental requirements.
5. Arrange a backup: a missed collection or unsuitable spreading weather should not leave you improvising.
6. Review changes: reassess after adding horses, changing bedding or altering turnout.

Common mistakes

• Building a bin before confirming how its contents will leave the property.
• Calling every old manure heap finished compost.
• Ignoring the volume contributed by bedding.
• Spreading to empty storage without checking soil, crop and weather conditions.
• Depending on one person or vehicle without a backup arrangement.

Frequently Asked Questions

Does a single-horse property need a manure plan?

Yes. The system can be simple, but collection, suitable storage and a dependable destination still need to be arranged.

Is composting the same as leaving a heap alone?

No. Composting involves managing and monitoring the material, followed by appropriate curing within the chosen system.

Can I give manure to a gardener?

Discuss what the recipient accepts, explain what bedding and other material is present, and distinguish fresh manure from managed compost. Check local requirements for the arrangement.

What if my land cannot use all the manure?

Compare off-site composting, collection and other suitable recipients. Plan removal around access and storage capacity, including delays.

A workable manure system makes the daily task easier and the final destination predictable. Start by recording what your property produces and confirming where it can responsibly go.

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