Clever farmers use clever technology, such as the new generation of precision “Smart” spreaders that are purpose-built by Red Ant Agri for orchard and vineyard use.

These machines apply granular fertiliser and lime in bands alongside tree rows, using full variable-rate application (VRA) based on site-specific prescription maps. In practice, an agronomist uploads calibrated rate maps to Red Ant’s cloud-based iot portal, the rate maps and machine calibration are then integrated on the portal and sent to an operator as a task. The operator downloads the task when he/she logs into the android device that in turn then connect via Bluetooth to the Smart Node (machine). External GPS units can be added to enhance GPS sensitivity and accuracy.

The Android phone serves as the GUI data logger and communication hub, feeding GPS and speed data to the spreader’s stepper-motor controllers. This “smart node” approach ensures that nutrients are applied only where needed, boosting efficiency and sustainability in high-value tree crops.

Precision application of fertiliser and lime

Red Ant spreaders are engineered for exceptional band placement and accuracy in orchards. A typical granular spreader is equipped with four independent metering units, each able to open or close instantly, so application rates can vary from zero up to the maximum in milliseconds.

In field trials, Red Ant machines have applied as little as 20 kg/ha (for micronutrients or bait) to over 300 kg/ha of fertiliser. Operators can adjust blower speed and outlet pipe length/angle on the fly to suit tree spacing and root-zone width. In James Reid’s words, “wind speed, as well as the length and angle of outlet pipes are adjusted to the maturity of the orchard and the radius of the root zone to achieve perfect band placement”.

The result is fertiliser (or lime or pellets depending on model used) delivered precisely into the root zone with minimal overshoot or waste. Granular or pellet form products are suited to the Paddle Wheel and Auger based spreaders respectively, while products in powder format are better suited to the belt spreader.

Overall, this precision targeting improves nutrient uptake and avoids the uneven coverage or runoff common with broadcast spreaders.

Smart spreader technology

At the heart of Red Ant’s system is sophisticated metering hardware. New Smart Spreader models (500 kg and 1 000 kg hopper sizes) feature an onboard PTO-driven hydraulic power pack to drive the venturi blower and flow-control systems. This independent power unit spares the tractor’s hydraulic system while delivering steady air flow for even spread patterns throughout an orchard.

The metering units in the paddle and auger spreaders are driven by high precision electric stepper motors, giving extremely fine rate control. Because the stepper motors can accelerate or decelerate instantly, the spreader can modulate application rate on the go, matching the prescription map’s requirements in real time.

Manual Red Ant models used a ground-driven meter (via a wheel-driven shaft with hydraulic clutch) for speed-independent metering. The new PTO-pack design simply enhances consistency and removes load from the tractor. All metering calibration is built into the IOT portal and Android App, and each spreader’s settings are pushed to the operator’s device as part of the field configuration.

Calibration of the Red Ant spreaders is ‘n quick and easy process that can be done in the field within a matter of minutes. When purchasing your Red Ant spreader for the first time, Red Ant Agri will ensure that you know exactly how to get the most out of your machine with their training.

Connectivity: GPS, IOT and control software

Every Red Ant Smart Spreaders operates as a “smart node” within a connected farm network. Application prescription maps are prepared on Red Ant’s cloud-based IOT portal, either by importing satellite/soil data or by manual zoning based on farm knowledge.

Once a rate map is finalised (for example vegetative index zones or soil sample-based blocks), the operator logs into the Red Ant Android app and selects the configuration. The app communicates with the spreader via Bluetooth and uses the phone’s GPS to determine speed and location. This information is processed on the Android app and the resulting instructions are sent to the Smart Node Control unit which then drives the motors or controls the belt speed (depending on node type.

James explains: “The app serves as the storage and communication device while controlling the stepper motors. The spreader’s position and speed are continuously monitored through GPS, and based on the forward speed of the spreader and the programme loaded, the app adjusts how swiftly the motors turn to perfectly meter out the fertiliser. In other words, the phone app effectively modulates the metering rate in real time to ensure each tree row receives exactly the programmed rate.

If an internet connection is available in the field, applied data (time-stamped location and rate) can be sent back to the cloud portal for record-keeping.

Red Ant also offers an optional active GNSS module (with external multi band antenna) to improve positioning accuracy. This upgrade can boost GPS accuracy from the smartphone’s typical ~3 – 8 m down to sub-meter or RTK capable levels. High-precision positioning is useful, for example, in narrow-row vineyards or where accurate geo-referencing of application is needed.

Red Ant Agri manufactures all their machines locally in the Western Cape, but their machines are not limited only to the local market. With satisfied customers as far as the USA and Australia, James and his team understands how important after sales service is to farmers.

Models and capacities

Red Ant currently offers the following spreader models for solid inputs:

  • Smart Granular Fertilizer Spreader (Band) – Available with a 500 kg or 1 000 kg stainless-steel hopper. Equipped with a venturi & blower, this unit applies granular fertiliser in a narrow band alongside tree rows. It uses the onboard PTO hydraulic power pack (no tractor PTO shaft required) and four electric stepper-driven metering decives (Paddle Wheel). Calibration is done via the Android App & iot portal, making it easy to switch between products or rate maps.
  • Smart Auger Spreader (Granules/Pellets) – A high-capacity variant designed for coarser materials and higher output rates. The top model has a 1800lt hopper and 2 sets of auger-style feed mechanisms. This model can broadcast granules or pelleted products. An internal divider (baffle) lets the hopper carry two different materials, each metered separately. Dual VRA maps can be loaded so that two fertilisers (or fertiliser and pellets) can be applied at independent rates in one pass.
  • Smart Mini Auger Spreader (Granular / Pellets) – A smaller version of the model above with a 750lt hopper and 1 set of Augers. This machine will provide the same VRA capabilities with a single product at a time.
  • Smart Lime Spreader – (Lime / Pellets & Granules) – This is the newest Smart Node in the range. The Stainless Steel Mesh belt can output a wide range of dry products. It is however better suited to high volume applications of products such as Lime and Gypsum. The output is controlled by adjusting belt speed at a preset gate height. A shaft encoder and PWM hydraulic valve ensure accurate speed control. The spreading is done via conventional spinners and an orchard cowling ensures good placement in the orchard. Spinner speed and chute angles are adjustable to achieve optimal spreading patterns.
  • Basic Ground-Drive Spreader (Conventional) – A locally-manufactured spreader with 500 kg or 1 000 kg hopper capacity. It uses a ground-driven metering shaft with hydraulic clutch (no tractor PTO needed) and an adjustable blower. Four picket-style metering discs provide a wide range of output rates. While it lacks the stepper motor control of the Smart models, it still offers precision band placement and supports manual rate calibration. This option suits growers who prefer a simpler mechanical spreader but still want uniform output.

Precision spreading requires precision equipment. Each machine is designed to optimise spreading of its intended product with precision VRA metering and optimal product placement at the heart of the machines DNA.

Precise placement of lime and fertiliser ensures that your plants receive the exact quantity of nutrients, exactly where needed. This decreases wastage and increases production, earning you a better yield as your soil quality improves.

Efficiency and sustainability benefits

Red Ant’s precision spreaders deliver clear agronomic and economic benefits. By automating rate control, they greatly reduce labour and overlap – a single operator can cover an orchard block to specifications without frequent calibration stops.

The ability to apply only the required quantity of nutrient in each zone cuts input costs; James Reid notes that targeted application results in the optimal efficacy and efficiency of fertiliser use.

Precision also means less environmental impact. As one report emphasises, over-fertilisation has direct downsides: “It costs money to put down more fertiliser than necessary, it acidifies soil and adversely affects soil organisms, and if it leaches into the groundwater, it causes contamination. By matching fertiliser placement to tree needs, Red Ant’s technology helps avoid all three problems.

In practice, growers have achieved savings on fertiliser and time. Red Ant quotes clients who match traditional spreaders on high application rates and beat them on the low side of rates. The precise band placement also improves fertiliser uptake, meaning more of the applied nutrients contribute to yield and quality rather than being wasted.

Other practical advantages include durable build quality (for example stainless bins), easy calibration (guided by supplied tools), and local service availability.

In summary, the Red Ant Smart Spreader series leverages modern IoT, GPS and precision-engineering to boost per-hectare returns and sustainability in tree crops. By delivering lime and fertiliser exactly where the plants need it, these machines support responsible, data-driven farming. Precision application means crop uniformity which translates to uniform quality & yield consistency. Improving the top line and optimising the bottom line at the same time.

Step into the future of orchard and vineyard management with the precision equipment manufactured by Red Ant. Contact James Reid on (+27)-82-213-7122, or send an e-mail to james@redantagri.co.za, or visit their website.