Robust coulter for direct seeding

The coulter is designed for direct sowing but works well also on cultivated surfaces. The double disc coulters are supported by a side-placed support wheel, which allows the coulter to precisely follow the soil contours in real-time and maintain the set sowing depth. A separate guide ensures that the seeds are placed at the bottom of the seed furrow, and the closing wheel that follows the coulter ensures the narrow seed furrow is closed.

Each coulter has its own pressure cylinder, allowing individual coulter pressure adjustment hydraulically from the tractor cabin. The ingenious active hydraulics adjust the coulter pressure whenever the coulter rises over a rock or descends into a hole, maintaining the set pressure value between 60-250 kg for each coulter. This requires only 5 l/min of continuous flow from a single hydraulic block. The coulters can also be adjusted without continuous flow if necessary. Greasing the coulter is made easy with a centralized greasing solution.

The D model’s coulter system is a Combi coulter that sows in the same row. Unlike other 3 and 4-meter models, the D model has a row spacing of 16.7 cm.

The mechanical feeding system is a simple, precise and reliable choice. The Junkkari’s high precision feeding mechanism is built on a mechanical transmission that adapts to the driving speed. The ground wheel and the cardan shaft reliably transmit the operating power from the ground. The gearboxes and full-width feed rollers control the feed quantities. Feeding works reliably in all situations, even without tractor power.

FEED AMOUNT CONTROL

The feed amounts are adjusted by changing the rotation speed of the gearbox. The gearboxes help to  achieve precise and consistent feed amounts even with small seed quantities, such as a few kilos of canola seed. The full-width, speed-adjustable feed roller withstands wear better and has a longer service life.

SEED ROLLERS

The two-part stud feeders on the seed side consist of a black feed roller used for grains and a yellow, narrower roller used for small seeds. When sowing grain, the rollers are connected by a red locking pin, which is released when switching to small seed sowing.

FERTILISER ROLLERS

The fertilizer rollers are full-width and equipped with larger feed holes that efficiently feed fertilizer clods as well. The full-width, speed-adjustable roller provides accuracy for small feed amounts compared to traditional roller feed, where the roller length is adjusted relative to the feed opening. The fertilizer roller is also recommended for sowing larger seeds such as peas and broad beans.

ELECTRONIC REMOTE CONTROL OF FETILISER

Electronic remote control for fertilizer is available as an optional accessory. This allows the fertilizer amounts to be adjusted during driving within the plot as soil types vary. Additionally, precision farming readiness is offered. This feature enables also the adjustment of seed and small seed quantities electronically according to a pre-planned sowing map. Precision farming readiness is built on the ISOBUS system.

BIGGEST HOPPERS ON THE MARKET

Large hoppers save time and money by reducing the number of refills needed. The hopper is divided into two sections. By adjusting the partition wall, the relative volumes of the seed and fertilizer hoppers can be changed. Additionally, a separate small seed box is available for sowing small seeds or starter fertilizer.

AMPLE EQUIPMENT

The hopper comes standard with sieves for fertiliser, and there are steps inside the hopper to make it easier to climb in. Inside the hopper there is a measuring chart to help you estimate the amount of seed remaining. This helps to assess how to optimise seed variety replacement.

As an optional extra, cameras can be installed in the hopper. The cameras help monitor seed and fertiliser levels so that the hopper can be sown completely empty.

HUGE HOPPERS PROVIDE EFFICIENCY

The total volume of Junkkari’s 3-metre machine’s hopper is 4,200 litres and the 4-metre machine’s total hopper volume is 5,700 litres. This means a grain sowing area of about 5 ha with a 3-metre machine and about 7 ha with a 4-metre machine with one hopper.

The corresponding volumes of small seed boxes are about 285 litres on a 3 m machine and about 380 litres on a 4 m machine. The combi seed drill can also be equipped with two small seed boxes with the small seed boxes mounted both at the front and the back of the machine.

Small seed box

The small seed box can be used to sow small seeds or starter fertilizer. Its volume is approximately 285 liters in the 3-meter machine and about 380 liters in the 4-meter machine. Combi seed drill can also be equipped with two small seed boxes, with the boxes mounted both at the front and the back of the machine. The gearbox allows stepless adjustment of small seed quantities, even with kilogram precision.

Cultivators

A combi drill can be supplemented with various cultivators.

A front leveller with one or two rows is an efficient option for hard and clay soil, where the front leveller renders the soil into crumbs and levels the surface, ensuring full germinability of the seeds. In soft soil the front leveller can be used to level the unevenness caused by the pressure of the tractor wheels.

A front harrow is a good option, if most of the soil is tilled with a disc cultivator or a cultivator. A front harrow can be used to level the plant waste from light tilling evenly and create a good seed bed for seeds.

S-tine leveller helps reduce tilling times. Depending on the soil type and humidity conditions, fields that are normally harrowed twice can be harrowed only once with the s-tine leveller. S-tine leveller can also be used to till headlands, which become compacted during turns when using the reciprocating sowing method. The s-tine leveller is available as 1-row with 25 cm row spacing and 2-row with 12.5 cm tine spacing, the 2-row has a more spacious structure, with two axles which better penetrate plant waste.

Disc cultivator is intended for direct seeding and additional tilling on hard soil after light-tilling, and for land where plant coverage in winter is the primary cultivation method. A disc cultivator has ploughing discs.

DRAW EQUIPMENT STEADY AND HEAVY

There are two different versions of draw equipment, depending on the machine’s cultivator equipment.

Steady draw equipment is intended for a machine with no cultivators or only a light, single-row cultivator, such as a front leveller, s-tine leveller or front harrow. In draw equipment, the dimensions of the towbar’s beam are 150×100 mm.

Heavy draw equipment is a more robust version intended for double-row cultivators and disc cultivators. Double-row cultivators are longer and also require a longer and sturdier towbar. The dimensions of the draw equipment’s towbar’s beam are 250×150 mm.

Both types of draw equipment are options for 3- and 4-metre machines, excluding the D model, which is always manufactured with Heavy draw equipment.

THREE DIFFERENT TOWING OPTIONS

A hook towbar that connects to the tractor’s towing hook is a clear and inexpensive option for towing a combi drill. The length of the towbar can be adjusted to suit different tractors.

Two-point linkage, which is connected to the lower links of the tractor. Two-point linkage makes the combi drill and tractor combination agile and it is possible to make tighter turns in headlands.

Packer packs the soil between the wheels of the tractor and guarantees an even sprouting surface for seeds. This helps achieve even new crop and conditions for good growth.

The packer is connected to lower links, the same as the two-point linkage, which improves the agility of the combination. The packer keeps the seeding depth stable, because in the field, the combi drill is supported by the back wheels and packer. Then the changes in the tractor height do not affect the seeding depth.