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DCA Publikationer Causes of yield stagnation in winter wheat in Denmark DJF rapport Markbrug, nr. 147, 2010 Af Petersen, J., Haastrup, M., Knudsen, L. & Olesen, J.E.  The Danish national yields of winter wheat are lagging behind and have since the turn of the millennium been surpassed by yields in other north-west European countries. The stagnating yields are a cause of concern for both farmers and farmer’s organizations in Denmark.
This project aimed to identify changes in Danish agricultural practice that may explain the stagnating yields. The analyses include effects of soil type, climate and external factors, breeding and genetics, fertilization, plant protection, technology and farm management. Technology was in this context taken as changes in soil tillage and soil compaction, but also considered in relation to farm management. With focus on the changes since the 1990s we conclude that stagnating yields have not only been observed in Denmark, but also in other north-west European countries. There are several likely contributing factors, and some of these will not persist over time so that yield increases in future may be higher than during the period from 1990 to 2007. |