Applying a silage additive is one of the simplest ways to improve fermentation, preserve feed quality and reduce spoilage losses in the pit or bale. However, even the best silage additive will only perform properly if it is applied accurately and evenly across the crop.
Whether silage is being harvested with a rake, baler, trailed harvester, self-propelled harvester or wagon, the objective remains the same — ensure the correct volume of additive is applied consistently across the full swath.
Modern applicator systems have made this process much more practical for both farmers and contractors. With the correct setup, calibration and maintenance, silage additives can be applied accurately with very little disruption to harvesting.
Specialist Nutrition offers a range of Magniva silage additives and practical applicator systems designed to suit different harvesting methods and silage conditions.
Why Correct Silage Additive Application Matters
Silage additives work by supporting rapid fermentation and improving preservation within the pit or bale. For this to happen effectively, the additive must be distributed evenly throughout the crop.
Poor application can lead to:
- uneven fermentation
- heating and spoilage
- inconsistent feed quality
- reduced aerobic stability
- unnecessary dry matter losses
Correct application helps ensure the entire swath is treated evenly, allowing the additive bacteria and enzymes to work effectively throughout the forage.
The goal is not simply to apply additive, but to apply the correct amount accurately based on crop tonnage, dry matter and harvesting conditions.
Modern Applicator Systems Make Adjustment Simple
Modern liquid applicator systems are designed to be practical and easy to use during busy silage periods.
Most systems are controlled directly from the tractor cab using a digital control box. This allows the operator to adjust application rates depending on:
- tonnes per hour
- bale weight
- crop density
- dry matter
- fresh weight tonnage
The additive itself is mixed with water before application.
A pink dye tablet can also be added to the tank which helps operators clearly see the liquid level and visually confirm that the additive is flowing correctly during harvesting.
The dye is not suitable for organic farms.
Applying Silage Additive with a Grass Rake
Grass rake applicators provide a practical way to apply additive before the crop reaches the harvester or baler.
The system demonstrated by Specialist Nutrition uses a 125-litre tank with nozzles positioned to spray liquid from both sides of the swath. This helps ensure the full width of the crop receives even coverage.
Application rates on rake systems are generally between 0.5 and 2 litres per tonne of fresh grass, depending on crop conditions and setup.
Even coverage across the swath is particularly important at this stage, as untreated areas can reduce overall fermentation quality later in the pit or bale. Silage should also be picked up on a timely basis. Best practice in this scenario is to have the rake in the field applying additive while the crop is being picked up by the harvester or baled shortly afterwards. If additive is applied via the rake, the treated grass should be harvested into the pit quickly or baled promptly to ensure the additive can begin working effectively and support efficient fermentation.
Applying Additive Through a Baler
Applying additive through a baler is one of the most user-friendly methods for treating baled silage.
The additive is sprayed directly onto the swath just before the grass is picked up and enters the baler chamber. This ensures treatment occurs immediately before baling, helping distribute additive consistently throughout the bale.
As with rake systems, application rates generally range between 0.5 and 2 litres per tonne depending on conditions.
For many farms making baled silage, this approach provides a straightforward and reliable method of additive application without slowing harvesting progress.
Low-Volume Applicators for Trailed and Self-Propelled Harvesters
Trailed and self-propelled harvesters often use low-volume applicator systems capable of applying Magniva additive at rates as low as 50ml per tonne.
These systems can usually be mounted quickly, often within 10 minutes — either on the drawbar or alongside the cab depending on the machine setup.
Low-volume systems provide a highly efficient way to apply additive while keeping water usage low during harvesting.
Correct nozzle positioning is critical on these systems. Operators should be able to clearly see the spray pattern during operation so that any blocked nozzle or interruption in flow can be identified immediately.
Even a partially blocked nozzle can affect additive coverage across the crop.
Wagon Systems Require Higher Volume Application
Wagon systems require a slightly different approach due to the wider pickup reel and denser swath entering the machine.
In these situations, high-volume applicators are generally preferred to ensure enough liquid penetrates the crop properly.
Specialist Nutrition demonstrates wagon systems fitted with two nozzles to create a wider and more even spray pattern across the swath.
Without sufficient liquid volume, thicker swaths may not receive consistent additive coverage throughout the forage.
Matching the application system to the harvesting setup is therefore essential for achieving reliable fermentation results.
Correct Nozzle Placement Is Extremely Important
Nozzle placement is often overlooked, but it has a major impact on application accuracy.
Nozzles should always be positioned where the operator can:
- clearly see the spray area
- monitor liquid flow
- quickly identify any blockage or interruption
If spray patterns cannot be monitored properly during harvesting, problems may go unnoticed until after silage has already been harvested.
Good visibility helps maintain consistent additive coverage throughout the day.
Daily Maintenance Keeps Applicators Accurate
Applicator maintenance is relatively simple, but it is essential for maintaining accurate additive flow and reliable performance.
One of the most important daily maintenance jobs is cleaning the filter system. This is a quick process but plays a major role in maintaining constant flow to the nozzles.
Applicators should also be washed out after each cut of silage to prevent residue build-up inside the system.
Some applicators also require simple yearly maintenance, such as replacing a pipe on the pump annually to maintain performance and reliability.
These small maintenance checks help avoid downtime and application problems during busy silage periods.
Small Setup Details Can Have a Big Impact on Silage Quality
Applying silage additive correctly is not complicated, but attention to detail matters.
Even coverage, correct nozzle placement, accurate calibration and simple maintenance all play an important role in ensuring silage additives perform as intended.
Whether using a rake, baler, harvester or wagon system, the objective remains the same — apply the correct amount of additive evenly across the crop to support rapid fermentation and better silage preservation.
Need Advice on Silage Additives or Applicator Setup?
Specialist Nutrition offers practical advice on choosing the correct Magniva silage additive and applicator system based on your harvesting setup, crop conditions and silage goals.
Contact the Specialist Nutrition team today for support with silage additive selection, application rates and pre-season applicator preparation.
