The Junkkari S series is designed for traditionally cultivated soil and, under appropriate conditions, soil where reduced tillage has been used. Like the rest of the range, the S series was updated in autumn 2020. In addition to the new appearance, other significant changes include:

  • The land wheel has grown with its redesign, achieving reduced slippage and greater sowing precision. The power transmission from the land wheel to the gear box has also been strengthened.
  • Maintenance of the roller wheels has been made easier with a centralised lubrication system, which comes as standard with 7.5x20" roller wheels.
  • Steps have been added in each corner inside the hopper to make movement easier, and the remaining seed quantity can be easily checked using the handy scale sticker. Hopper cameras are also available as an optional extra.
  • An extension is also available for the hopper's partition wall for organic growers. This allows the partition wall to be placed fully forward to maximise the volume inside the hopper.
  • The ISOBUS controller has been updated and its user-friendliness has been further improved. A handy row marker lifting feature for clearing poles is included as a new feature.
  • The larger Plus hopper has stylish LED lighting as standard.
  • The updated 1-row s-tine cultivator and front-mounted tined weeder are now available as optional extras.

S series drills are based on a durable wedge-disc type coulter that maintains a precise sowing depth. The most commonly sold model, the Combi, deposits seeds and fertilizer in the same row using the same coulter with a row spacing of 12.5 cm. The Ferti model is also available with separate fertilizer disc coulters, with which fertilizer is deposited between every second seed row.

The drills are available in 3-metre and 4-metre variants, and the Combi model is available with both Eco and Plus hoppers. The Ferti model always comes with the Plus hopper. The Plus hopper is the largest on the market: 4,200 l on the 3-metre model and 5,700 l on the 4-metre model.  Additionally, a wide variety of optional accessories and features are available to make the driver's job easier.


Click link on the right for S300 Eco video.


S-series coulters


The S series is based on the wedge-disc type coulter, which holds a set depth precisely thanks to its bevelled profile. Height adjustment is performed at the spot where the seeds and fertilizer are deposited into the ground. Coulter pressure is 5–30 kg, and the series is also available as the Ferti model with separate fertilizer coulters in addition to the Combi model that deposits seeds and fertilizer with the same coulter. The roller wheels include integrated bogeys that ensure that the rows remain uniform regardless of the terrain. The roller wheels are available with 16" and 20" tyres.

The hopper is situated above the coulters, allowing for the feeding mechanism to receive a constant feed of material, for the feed distances to be short and for angles in the feedline to be minimised. The hopper has a spring-loaded tarpaulin cover that is extremely easy to use and makes filling the hopper effortless. Junkkari's products have the largest hoppers on the market, allowing for fewer fills per use. 

The combi drill is powered by the land wheel, from which power is transferred via a continuously variable transmission to the feeding mechanism. Feed quantities can be set precisely as desired from small quantities of small seeds to large quantities of large seeds. The feed is reliable in all conditions, even without electricity from the tractor.

Reliability and simplicity are the focus of the feed mechanism's design. The entirety of the feed roller's width is always used, precisely maintaining even small feed quantities at all drive speeds. When sowing small seeds, the only change that needs to be made is the introduction of a separate small feed roller, which allows for precise feed quantities of just a few kilograms. Calibration is very easy to perform and adjustments can be made with a remote controller for fertilizer and seeds, available as an optional extra.

Junkkari S300 Eco

Junkkari S300 eco

Junkkari S300 Plus


The S series uses a wedge-disc type coulter. The model is available with either a Combi coulter, which deposits fertilizer and seeds into the ground using the same coulter, or with separate fertilizer coulters in the Ferti model. The Ferti model uses a disc coulter that cuts through plant debris very effectively to deposit fertilizer. We recommend using the Ferti model with its separate fertilizer coulters when using a fertilizer that contains urine or a nitrogen content greater than 120 kg/ha to reduce the risk of fertilizer burn.


Hoppers for 3-metre units can be chosen from Eco (2,700 l) or Plus (4,200 l) sizes. The 4-metre units always come with larger 5,700 l Plus hoppers. The hoppers have an adjustable partition wall, for which an extension is available as an optional extra for organic growers. All hopper models have a simple, easy-to-use cover with a quick release latch. The cover can be opened both ways or up to the partition. Hoppers are equipped with fertilizer sieves as standard and seed sieves are available as an optional extra. All hoppers can be equipped with small seed and starter extras at the factory or retroactively. A camera system is also available.

Seed hoppers are equipped with a new, handy level scale that can be used to see the quantity of seed left in the hopper. Sturdy self-cleaning working platforms, railings and steps have been designed to make access and work tasks safe.

Control unit

We offer a wide variety of controllers. The simplest form available is an electronic surface area meter that has two surface area calculators with the basic controller.

G-Wizard's graphical controller offers access to most of the functions associated with managing and monitoring the combi drill. All the necessary information is displayed in real time and can be seen at a glance on the screen. Depending on the options installed on the drill, features such as monitoring of driving speed and data from two surface area calculators, hopper level sensors, axel rotation sensors and the gearbox, control of row markers, spraying bands and the half lift function as well as remote fertilizer control (G-Wizard Plus) are available.

The updated ISOBUS controller makes it possible to control the combi drill from the tractor's own ISOBUS controller. A separate ISOBUS controller installed in the tractor is also available. The ISOBUS controller enables you to adjust fertilizer and seed quantities while driving and make use of precision farming applications, allowing for adjustments to be made based on location information. Features such as monitoring of driving speed and data from three surface area calculators, hopper level sensors, axel rotation sensors and the gearbox, control of row markers, spraying bands, the half lift function and the row marker lifting feature for clearing poles as well as remote fertilizer and seed control are available.  

Roller wheels

The wheels situated behind the coulters act as both the travel and roller wheels of the drill. This removes the need for separate rolling after the crops have been sowed. Two tractor-pattern tyre types are available for the roller wheels of the 3-metre unit: 7.5x16" and 7.5x20", and a larger option is always available for the 4-metre unit. A larger tyre size is particularly useful on lighter soil types, as the drill becomes lighter to tow and the risk of bulldozing is reduced. Larger tyre sizes also reduce fuel costs and cause less damage to soil structure, thanks to lower surface pressure.

The wheels also allow for the drill to be towed between locations with a full hopper and provide a strong and open design. Locations that may need maintenance are easily reached, and centralised lubrication always comes as standard with the 7.5x20" wheels. Thanks to the bogey construction, the wheels follow the shape of the terrain very closely, the rows stay uniform and the drill remains steady while it is being towed from one location to another.

The following harrow comes as standard and harrows between the rows, breaking up the soil packed by the drill's tyres. The harrowed layer of soil prevents the surface from silting and a crust from forming as well as slowing evaporation of moisture from the soil. The half lift function, which is available as an optional extra, ensures the harrow remains in contact with the ground while the tractor and drill turn around on the headland.


In addition to the options mentioned above, there are a number of other extras available, including various towing solutions, front cultivators, row markers, spraying band switches, hopper level sensors, seed sieves, half lift functionality and small seed and starter extras.

Hydraulic row marker

   1-row leveller

   S series fertilizer disc coulters

 Small seed box

   Half lift functionality

 Seed-side spraying band switches

 Fertilizer-side spraying band switches

 Fertilizer and seed remote control

 Seed sieves

 Improved hopper monitoring



  Precision farming application

Hopper partition wall extension for organic growers

Tined weeder

Camera system



Video gallery

S300 Eco


Technical specifications

Soil preparation Minimum or conventional tillage Minimum or conventional tillage
Coulter type single disc single disc
Depth control  Wedge shaped coulter Wedge shaped coulter
Coulter durability Good Good
Coulter pressure range 5-30 kg 5-30 kg
Coulter pressure adjustment Mechanical central adjustment  Mechanical central adjustment 
Pressure element Tension spring Tension spring
Seed coulters, pcs 24 32
Row spacing, seed 12,5 cm 12,5 cm
Fertilizer placement Fertilizer coulter/seed coulter Fertilizer coulter/seed coulter
S-tine fertilizer coulter Option Option
Fertilizer disc coulter Option Option
Fertilizer double disc coulter Option Option

HOPPER S300 S400
Options Eco, Plus  Plus
Tilavuus 300 Eco 2 700 l
300 Plus 4 200 l

400 Plus 5 700 l
Partition wall Adjustable (no wall in Seed version) Adjustable (no wall in Seed version)
Sieves for fertilizer Standard (not in Seed) Standard (not in Seed)
Sieves for seed Option Option
Tarpaulin cover Manual rollin/spring operated (Plus) Manual rollin/spring operated (Plus)
Metering device, fertilizer Rifle feed, gearbox adjustment Rifle feed, gearbox adjustment
Metering device, seed 2 studded wheels, gearbox adjustment 2 studded wheels, gearbox adjustment
Small seed box Option Option
PAcker wheels S300 S400
Tyre options 7.5 - 16" or 7.5 - 2 7.5 - 20"
Brakes Option for 7.5-20 Option for 7.5-20
draw equipment S300 S400
Hydraulic track marker Option Option
Packer 100 cm/7.5x16" - -
Packer 140 cm/10.0/75-15.3 Option Option
control unit S300 S400
Options No control unit/Area metering/
No control unit/Area metering/
Tramlines for fertilizer Option Option
Tramlines for seed Option Option
Fertilizer remote control Option Option
Seed remote control Option Option
Precision farming solution Option Option
Intensified hopper monitoring Option Option
options S300 S400
Track marker, hydraulic Option Option
Single-row front leveller Option Option
Double-row front leveller - -
Double-row s-tine leveller - -
Disc cultivator - -
Half lift Option Option
Small seed and start fertilizer device Option Option


dimensions S300 S400
Working width, cm 300 cm 400 cm
Transport width, cm 300 cm 400 cm
Transport height, cm (Eco/Plus) 291/341 cm 291/341 cm
Working height, cm (Eco/Plus) 189/216 cm 189/216 cm
Lenght, cm 474-650 cm 474-650 cm
Weight, cm min 2 500 kg min 3 100 kg
Power demand, kWh 55-95 kW 75-115 kW