Spray Control Systems for Precision Agriculture: The AllyNav VS100

Chemical inputs account for a significant share of per-hectare production costs across most crop types. Over-application in overlap zones does not just waste product — it stresses crops, creates residue risk, and in regulated markets can result in compliance issues at the point of sale. Under-application in skipped zones leaves crop protection gaps that cannot be corrected after the spray window closes.

Manual section switching makes both problems worse. Operators working at speed across complex field shapes cannot reliably open and close sections at the right moment — especially at field boundaries, around obstacles, and on irregular headlands where overlap is most likely to accumulate.

A purpose-built agricultural sprayer controller solves this at the source. Pairing GNSS positioning with automated flow regulation removes the timing dependency from the operator entirely, delivering consistent results regardless of field geometry, working speed, or conditions.

VS100: Built for Precision, Designed for Scale

Three numbers define what the VS100 delivers in the field: 98% spraying accuracy, speed measurement precision of ≤0.1 m/s, and support for up to 20 simultaneous valve sections. Here is what each means in practice — and why the combination matters more than any single figure in isolation.

Section Control That Eliminates Overlap

The VS100 tracks treated areas in real time using GNSS positioning. As the sprayer approaches a previously covered zone, individual sections close automatically — and reopen the moment the machine moves into untreated ground. The tablet displays a live map of the operation, showing open and closed sections at a glance.

The result is section control spraying that requires no manual intervention. Operators stay focused on the field; the system handles the boundary decisions. Overlaps and skips drop to near zero, cutting chemical use while maintaining uniform coverage.

Variable Rate and Reapplication Control

Speed changes during headland turns and in tight field corners create application rate errors in systems that rely on fixed-flow settings. The VS100 uses GNSS speed data — not wheel encoders — to adjust flow in real time, keeping the application rate consistent whether the machine is at full speed or slowing for a turn.

Reapplication control works on the same principle: when the sprayer re-enters a partially treated area, the system automatically reduces output to account for the volume already applied. No manual recalculation, no guesswork. This is what variable rate spraying looks like when it is built into the controller rather than bolted on as an afterthought.

Up to 20 Sections — One Controller

Large booms and complex field layouts typically require multiple controllers or compromises in section granularity. The VS100 supports up to 20 valve sections from a single unit, covering the full width of wide-boom equipment without adding hardware or splitting the display workflow. Section boundaries can be configured to match the exact geometry of the boom, ensuring that each section opens and closes at the right field position regardless of boom width or configuration.

For operations that run multiple machines, the VS100 connects directly to AllyNav’s autosteering systems — sharing the same tablet, the same GNSS antenna, and the same interface. One screen handles both steering and spraying.

ISOBUS Compatible, Easy to Integrate

ISOBUS compatibility means the VS100 connects to most major tractor brands and third-party implements without custom wiring. For farms already running AllyNav AF-series autosteering, the VS100 slots directly into the existing setup — no second display, no second antenna, no separate subscription. Operational data from both systems feeds into the same session, giving operators a complete view of steering accuracy and spray coverage side by side. It is also fully compatible with AllyNav’s precision agriculture solutions platform, enabling centralised data collection and real-time agronomic monitoring across the entire operation.

Core Applications

Row Crops and Broad-Acre Farming

For large-scale arable operations, the VS100 covers the full production cycle — herbicide applications in early growth, fungicide passes at canopy closure, and harvest-aid spraying at season end. Running alongside an autosteering system, it removes two of the highest-cost error sources in field spraying: overlap waste and missed strips. The 20-section scalability means wide booms can be managed at full granularity without splitting the workflow across multiple controllers. Pair it with a GPS land leveling system as a foundation step to improve drainage uniformity before the first spray pass of the season.

Specialty Crops and High-Value Applications

Where input cost per hectare is highest — vineyards, orchards, vegetables — precise application is not optional. The VS100’s GNSS speed-based flow control maintains accuracy at the low, variable speeds typical of specialty crop work, where mechanical wheel-based systems lose precision. Combined with precision seeding earlier in the season, it forms a complete input management approach from planting through crop protection.

Technical Specifications at a Glance

Full specifications are available on the VS100 product page. Key figures for equipment evaluation and integration planning:

The Right Spray Control System for Your Operation

Precise spraying is not a premium feature — it is the baseline for any operation serious about input efficiency and crop consistency. The VS100 delivers section control spraying, variable rate management, and 20-section scalability from a single, ISOBUS-compatible controller that integrates directly with your existing tractor and autosteering setup. Setup is straightforward: no custom hydraulic modifications, no additional displays, and no separate antenna if you are already running AllyNav autosteering.

It is one part of AllyNav’s connected field equipment ecosystem, alongside autosteering systems, precision seeding control, and land leveling — all managed through a unified platform. For operations looking to build a complete input management stack, the VS100 is the logical next step after autosteering. Explore the full range of precision agriculture solutions or contact the AllyNav team to configure the VS100 for your sprayer and field conditions.