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15.
March
2015

STRIEGEL-PRO: A Universal and Effective Aid in Pre-sowing Preparation and Crop Residue Man

The continuously increasing yield and decreasing animal production, create a problem in relation to the incorporation of crop residues in the stubble-field (straw). Therefore, BEDNAR has designed a new type of machine for fast and effective work with crop residue immediately after the harvest that can also be used in the spring pre-sowing preparation, particularly in heavy waterlogged soils.   

Crop Residue Management

Crop residue management in the stubble field is not required if you collect straw from the field immediately after the harvest. However, if you would like to incorporate straw into the soil, then it should be thrashed during the harvest.  Today, farmers commonly use harvesting thrashers with a reaping roller of nine or more metres wide. It is not technically possible to distribute the thrashed straw throughout the entire working width, which creates difficulties in subsequent operations due to straw clumps. For example, there is about 6 t/ha of thrashed straw after the harvest of winter barley yielding 7.5 t/ha. When using the reaping roller with a width of 9 metres, the straw is distributed into strips over a width of about 6 meters behind the thrasher. And this is where the spots with a large concentration of post-harvest residues occur. The harvest should be followed by shallow stubble tillage, about 8 – 10 cm deep (according to the volume of straw) when you do not want to go deeper to prevent the loss of moisture, typical in the summer months. However, the spots with a large concentration of crop residue make us process soil deeper to incorporate the residue and to mix the second growth well. 

Uneven distribution of thrashed straw during harvest

Land with uneven distribution of thrashed straw where stubble tillage has been done


Correct Approach

STRIEGEL-PRO has been designed in response to the problem described above. It solves the problem of the uneven distribution of thrashed straw. It is a straw harrow that evenly distributes straw along the entire working width of the machine in a single pass. The distribution of straw all over the area of the stubble-field creates ideal conditions for subsequent soil processing, particularly stubble tillage. Another great advantage of the spread straw is that there are no straw clumps that take longer to dry in wet conditions, creating the favourable conditions for mould diseases, as well as slug propagation. 

Large straw clumps promote slug propagation, which later damage both above-ground and underground parts of crops.

STRIEGEL–PRO PE at work – distribution of straw 


Stubble tillage of a field where straw has been distributed after the harvest of winter barley

Field after the harvest of winter rape, which was desiccated, after a single pass with the STRIEGEL–PRO PE with aggressive positioning of the tines


Introduction

STRIEGEL-PRO is a straw harrow with 6 rows and hydraulic tine-angle setting. The last two rows of tines are set at a different operating angle for an improved quality of the final surface treatment. The machine is equipped with cutting coulters for management of crop residue in the stubble field. The coulters are located in front of the tines and they are attached to a flexible beam. The coulters cut the crop residue and partially break the soil structure. For spring preparation the machine may be equipped with a front hydraulically-controlled leveller – the crush-bar. The paddles of the leveller can be mounted instead of the coulters. It is also possible to add a track cultivator behind the wheels of the machine that are on the same axis as the tractor wheels. The machines are offered with working widths of 10, 12 and 14 metres.

STRIGEL-PRO PE equipped with front coulters – version for operations in the crop residue management

STRIGEL-PRO PE version for operations in spring pre-sowing preparation 


Broad Application

In addition to straw distribution, the machine can also be used for processing soil after the harvest of winter rape that was desiccated. A more aggressive setting of the tines (diameter: 16 mm, spring protection) allows the machine to break the soil relief to a depth of 2 – 4 cm, in addition to cutting and distributing the rape straw, which is sufficient for creating ideal conditions for the second growth of rape. Stubble tillage is executed after the second growth has emerged. The tillage also mechanically destroys the second growth. 
Another main application of the machine is during spring preparation, particularly in wet and heavy soils where it allows for breaking crude furrows and levelling the surface to a shallow depth in a single pass, without bringing the cold and moist soil up. The machine has no rotating rollers that could get clogged. This allows us to speed up the following final pre-sowing preparation by several days. This is definitely something that spring barley growers will appreciate in early spring barley sowing, every day counts as it is one of the factors having an effect on the yield. 
And last but not least, the STRIEGEL-PRO can also be applied in restoring meadows and pastures in the spring. 

STRIEGEL-PRO PE 12000 at work, breaking the crude furrow

The result of work after a single pass in the autumn crude furrow 


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