Just Common Sense AB participates regularly in various research projects to develop CombCut together with external institutes, growers and businesses. It is important for us to develop and verify CombCuts efficiency and function.
- OSCAR: a collaborative European research project to develop more sustainable systems of conservation agriculture and increase the diversity of cover crops and living mulches, We participate in the subproject “Integrated weed management to increase yield and profitability in forage production”.
- (2011 – 2013) New applications for CombCut Direct Link to SLU Ekoforsk website about the project (Sorry Swedish only but you can read our English summary below ). 3-year research project funded by the Swedish University of Agricultural Sciences (SLU) Ekoforsk evaluated the CombCut and its effectiveness against thistle was proven.
- (2008 – 2011) Evaluation of thistle cutter CombCut. Direct Link to SLU Ekoforsk website about the project (Sorry Swedish only but you can read our English summary below ).
Summaries of completed projects
2008 – 2011 Evaluation of thistle cutter (Comb Cut)
Note: The results of this research are also integrated in other parts of this site.
- Thistle cutter (now called CombCut) can cause creeping thistle / Canadian major injuries.
- Cutting time is a timing issue. Cutting must be done after the thistle began to shoot height to cause mechanical damage to the weeds.
- Cutting is retarding the growth and development of creeping thistle and reduces seed production significantly. Add in competition from a crop and the production of seeds will reduce additionally. CombCut can thus also be used to cut the flower and seed heads to prevent seed dispersal. (87 to 100% reduction of produced flower buds)
- Cutting reduces the amount of biomass (above-and underground) of the creeping thistle over time. Add in competition from a crop and it reduces the amount of produced biomass (Above-and underground) of weeds further. (68 to 89% reduction of above-ground dry matter (plant), and 66 to 79% reduction of underground dry weight (root))
- In the pot experiment the harvest of spring barley increased significantly in the pots of grain with cut-off thistle in compared with untreated pots. (76-94% higher grain yield)
- In the field experiments in 2009 were found a negative impact of creeping thistle on crop biomass during the summer, but the variability of the field was too large to detect significant differences in spring wheat harvest between cut and uncut parts.
- To avoid damage of the crop and reduction of yield, cutting should be done before the crop starts to develop firm straws . This especially when you have aggressive settings on the knives.
- For the best effect of the CombCut, you should have a competitive (thick and fine), whose crop of good growth at the cut-off. This magnifies the effect of the cut so that the Creeping thistle suppression and crop benefit even more. This is especially important when there are large amounts of Creeping thistle.
- If the blades are set in a more aggressive way, you get a better effect on the Creeping thistles, but also a increased risk of damage of the crop.
- To reduce the seed dispersal of Creeping thistle weed cutter can be used to cut off the flowers and seed heads above the crop later in the season.