When choosing between a tractor-driven or electric agitator for a manure lagoon, many producers are unsure which option offers greater efficiency for their specific situation. The answer depends on factors such as infrastructure, labor availability, lagoon access, and the farm's operational routine.
You need to homogenize the waste lagoon on your property, but when it comes to choosing an agitator, you're unsure: is it better to invest in a tractor-mounted agitator, which uses the equipment you already have, or to opt for a fixed, automated electric one?
The answer depends on variables specific to your property — and understanding the differences between the two types is the first step in making the right choice. In this article, we explain how each one works, what the advantages and limitations of each model are, and what to consider before deciding.
Why stir up the sewage lagoon?
Before comparing the types of agitators, it's worth understanding why agitation is essential in the management of waste lagoons.
Without proper handling, bovine and swine manure tends to stratify: heavier solids settle to the bottom, lighter materials form a crust on the surface, and the material in the middle loses homogeneity. The result is a lagoon that cannot be efficiently pumped, biofertilizer of inconsistent quality, and an environmental liability that grows over time.
Proper agitation:
• It breaks up the surface crust and prevents its formation.
• It homogenizes the solids, making the material pumpable and uniform.
• Improves the quality of biofertilizer, with uniform distribution of nutrients.
• It facilitates pumping and application in the field.
The point under discussion is not to get agitated — it's how to get agitated more efficiently for the reality of each property.
Tractor-mounted agitator: high performance with the equipment you already have.
The tractor-driven agitator uses the power of the farm's tractor to move the manure. AGTO offers two drive types for this model:
Cardan drive (power take-off)
The agitator is coupled to the tractor's power take-off (PTO) via a cardan shaft and positioned inside the lagoon. It is the model with the highest agitation efficiency—the power transferred directly from the tractor's engine ensures the ability to move large volumes of waste efficiently.
Important note: Cardan drive requires the tractor to have access to the pond level for proper positioning. On properties where access is limited or the terrain around the pond is uneven, this can be a limiting factor.
Hydraulic Drive
The hydraulic agitator uses the tractor's hydraulic system to power the agitation. Its main advantage is its articulation: it can reach hard-to-access locations where positioning a PTO shaft would be impractical.
In general, the tractor-mounted agitator is the ideal choice for properties that:
• They already have a tractor available with the appropriate power.
• They have access to the area around the lagoon that is compatible with the operation.
• They prefer a smaller initial investment in fixed equipment.
• They perform agitation at specific times — before pumping, for example.
Electric stirrer: convenience, automation, and zero operating cost.
The electric agitator is permanently installed in the pond and powered by an electric motor. After installation, it requires no manual operation and can be programmed for automatic activation at set times.
All AGTO electric models are available in three-phase, single-phase, and two-phase options — compatible with different types of rural electrical installations.
The electric stirrer is the ideal choice for properties that:
• They seek continuous or scheduled activity, without depending on manual labor.
• Access around the lagoon is restricted for tractor maneuvering.
• They have available or planned electrical infrastructure.
• They want to reduce the tractor's reliance on this function, freeing up the equipment for other activities.
What to consider before deciding
In practice, the choice between a tractor-driven and an electric agitator is rarely a question of which is better — it's a question of which best fits the reality of your property.
Questions that help define:
• Do you already have a tractor available with the minimum required power? If so, a tractor may be the most economical option.
• Does the tractor have easy access around the pond? If the terrain is uneven or space is limited, electric or hydraulic tractors are more suitable.
• Do you have manpower available to operate the agitator regularly? If not, the electric agitator with automation solves the problem without depending on an operator.
• Do you have more than one pond? The tractor-driven agitator can be moved between ponds; the electric one is fixed and requires one unit per pond.
• What is the depth and volume of the lagoon? The length of the agitator needs to be compatible with the depth to ensure efficient homogenization.
In many farms, the ideal solution is a combination of both: a tractor-driven agitator for heavy, periodic agitation and an electric one for continuous maintenance of homogeneity. But this decision also depends on a technical assessment.
The right choice starts with the right question.
Whether to use a tractor-powered or electric agitator is not a matter of which is superior. It's a technical decision that takes into account your tractor, your pond, your workforce, and your routine.
What cannot happen is leaving the waste lagoon without proper agitation—whatever the reason. The costs of a poorly managed lagoon, in terms of wasted biofertilizer, pumping difficulties, and environmental liabilities, far outweigh the investment in a proper agitator.
AGTO has models for both types — and a technical team ready to recommend the right equipment for your needs.
Which agitator is right for your waste lagoon?
AGTO manufactures tractor-driven and electric agitators for swine and cattle manure lagoons. Our technical team analyzes the conditions of your property — lagoon depth, access, tractor availability, and electrical infrastructure — and recommends the ideal model.
Get in touch and speak with an AGTO specialist.
