Sönderdelning av plogtilta med skärknivar
During the last couple of years it has been more important to reduce the driving on the field to prepair the soil after ploughing. The machine costs are high so it is necessary to be effective. To reach a pleasant soilbed directly after ploughing is sometimes possible on easier soils but heavier clay soils always need more tillages. There is a lot of equipment mounted on the ploughs on the market, for example Furrow Cracker and Furrow presses, which makes a pleasant soilbed on easier soils. The last year Överum and Kverneland have presented knives which are mounted on the wing or moulboard. The knifes cut the furrowslice before it turns around which makes the soil fall in part. I choose to use the knives from Kverneland in a field trial, because of the many different holes they have to mount the knives in. In the trials I tested four different mountingplaces on the wing and moulboard. After the ploughing the field was soil levelling with float before it was drilled with a Väderstad Rapid drilling machine. The results showed a good degradation on the soil which can save an harrowing. The best result was in the treatment E. The emergence showed differences between some of the experimental treatments. All the experimental treatments had acceptable emergence, probably because of the pleasant germination capacity the autumn of 2003.