- Weeder harrow with 4 bars and 8 rows
- Hydraulic tine pressure adjustment
- Working widths 6 and 9 metres
Weed control from the start
The Thulit weeder harrow optimally complements the innovative LEMKEN hoeing technology and makes weed management a success factor for your arable farming. It enables the early use of mechanical weed control and contributes to weed-free crops without the use of chemical plant protection.
The advantages of harrowing
- Elimination of weeds, which compete with crops for resources such as water, light and nutrients
- Aeration of the soil
- Promotion of mineralisation
- Reduction of water evaporation by breaking the capillary effect
- Levelling of the soil surface
- Promotion of tillering
The Highlights of the Thulit
The where and when of harrowing
The harrow pulls out or buries small weeds and breaks up soil incrustations. This not only saves on pesticides, but also has positive effects on the soil. The aeration has a clear effect on nitrogen mineralisation. In addition, harrowing promotes the tillering of the crop and has a positive effect on the water balance. The levelling of the soil facilitates all future operations.
The Thulit weeder harrow can be used in a variety of ways in field crops such as cereals, maize or vegetables and in ridged crops, e.g. potatoes.
The Thulit can be used for weed control almost all year round. Even before sowing, the freshly germinated weeds can be removed from a false seedbed created weeks before. Immediately after sowing, it is used for pre-emergence weed control. Depending on the growth of the plants, it can be used as long as the size and density of the crop allows, or until the hoeing machine is used. For maize, for example, this is the 3 to 4 leaf stage.
What makes Thulit so versatile?
The challenges for successful mechanical weed control are constantly growing. It must start with small and sensitive plants and be feasible in all crops and as many development stages of the plants as possible. For the Thulit harrow, LEMKEN has developed a unique combination of tine shape and hydraulic tine adjustment. It ensures a constant contact pressure over the entire process path with every adjustment.
The tine shape
The tines are 575 mm long diagonally with a bend of 120°. These dimensions are optimal to ensure a constant tine pressure regardless of the tine position. With a diameter of 8 mm, they are very stable.
This ensures good power transmission to the ground and prevents lateral deflection. Therefore, they work evenly without overlaps or misses over the entire working width of the machine and reliably remove the weeds. The large wear area of 120 mm guarantees a long service life of the tines.
The tine quick-change system
If necessary, the tines can be easily replaced using the quick-change system. This requires only a few steps:
- Tool-free removal of the connecting rod
- Loosen the bolt
- Remove the harrow tine
- Insert the new tine
The hydraulic tine pressure adjustment
The tine pressure can be continuously adjusted from the tractor cab, even while driving. The adjustment options range from gentle harrowing below the tines' own weight (< 100 g) to a maximum contact force of 5,000 g per tine. The indirect loading of the harrow tines ensures constant pressure in every application, both on flat surfaces and when working in ridge crops.
Support wheels for the correct depth guidance
The Thulit can optionally be equipped with two or four support wheels at the front and rear. Their height is easily adjustable on the profile frame and allows the aggressiveness of the tines to be adjusted.
The distance between the wheels can be easily adjusted by moving them on the profile frame.
In a perfect frame
The Thulit always provides sufficient visibility at work, as it is based on a four-beam frame concept, in contrast to the eight beams commonly found on the market.
Everything in view
Thanks to the hydraulic system, there are no springs in the driver's field of vision.
The small number of bars and moving parts in the harrow frame allows a very good view of the red tines and early and better control of the work result.
Distance for the best result
The tines of the Thulit are arranged asymmetrically in 8 rows with 180 mm spacing. With 32 tines per metre of working width, the line distance is 31.25 mm.
This arrangement provides 15 percent more diagonal clearance than conventional harrows. As a result, the Thulit works almost clog-free, even with large quantities of organic matter.
Lightweight and stable
The unique frame concept of the Thulit ensures high stability. Due to the reduced number of beams, the beam profiles are very stable and the total weight is kept low at the same time.
High ground clearance
The LEMKEN Thulit weeder harrow is also particularly impressive due to its high ground clearance. There are no springs or other sharp components under the 450 mm high frame in which plants could get caught. This also simplifies harrowing in ridge crops or late growth stages, as blockages are reduced to a minimum.
The side segments are folded in for transport. A one-sided folding system is available as an option, with which the outer working sections can be lifted separately. This also allows working with the machine folded in on one side.
The automatic folding of the tines for transport ensures an increased level of safety. This protects against damage and also makes it easier to remove material that has been caught in the tines.
What needs to be considered when using a weeder harrow?
- The soil must be well prepared
- The sowing depth must be below the working depth of the harrow.
- The weather conditions should be suitable: dry, sunny, windy.
- The smaller the weeds, the more effective the work on emerging weeds.
- The effect of the harrow depends on the speed, position and pressure of the tines.
- The following factors must be taken into account when setting the aggressiveness: Plant stage, soil hardness and weed roots.