The weeds developing in that period can, however, still easily be eradicated mechanically shortly before sowing the spring wheat crop in March. Secondly,spring wheat based cropping systems allow for a catch crop in winter that more effectively reduces nitrogen leaching during wet winters than winter wheat does [10].
3.2. Bread production chain actors
The Dutch conventional bread market is dominated by super-markets and their suppliers: large scale bakeries who obtain their flour from industrial mills (Table 3). Organic subsidiaries of actors in the conventional bread production chain also produce the organic bread for the supermarkets. However, only 30% of organic bread is sold through the supermarket channel [11]. Most organic consumers buy their bread in specialised organic shops.