The aim of this research project is to determine the exact nitrogen input in organic wheat and the changes in nitrogen content in the soil and in the plant over the vegetation period. These measurements are carried out on 20 organic farms in conversion in the region of Bern and in western Switzerland.
For this purpose, the nitrogen content of the manure is analysed by FiBL. At the beginning of the growing season, soil samples are taken to measure the available nitrogen (N-min). On the other hand, the producers will record the quantities applied as accurately as possible and estimate the total amounts. This will show whether the use of nitrogen on these farms can be optimized in the future. This would have a positive effect on yield, quality and the environment.
Furthermore, the additional costs that optimization would entail should also be shown. The results of the analyses will be compared with the producers' assessments and discussed in two experience groups, one in German and one in French. Further optimizations with regard to weed control and pests are examined in more detail with an experienced advisor in the field and possible changes are discussed.
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