The use of wood ashes as potash fertilizer was tested on sunflower. The greenhouse experiment was conducted in Changins and used wood ashes provided by the wood power station Enerbois (Vaud). These ashes contained high amounts of Ca and K but also trace elements, particularly Cu, Zn and Ni. Results of the trial highlighted an efficiency of K contained in these ashes equivalent to that of KCl used as reference potassic fertilizer. In NPKMglimiting conditions, the wood ashes had a positive effect on the biomass of sunflower and the absorption of K, but they reduced the amount of absorbed Ni and Zn, probably because of the negative effect of liming on the solubility of these elements. In not-NPKMg-limiting conditions, the same trends were observed regarding the biomass and the absorption of Ni and Zn. This trial showed that despite Ni and Cu contents beyond the limits currently approved in Switzerland for recycling fertilizer, it is above all the K levels that limit the amount of ashes to be spread.
Tuta absoluta is one of the most destructive pests of solanaceous crops. Agroscope has developed a statistical model to study the population dynamics of the pest and its parasitoids and allows interventions to be optimally planned.
Swiss vineyards are often small and arranged in a mosaic of separate plots and management practices. Therefore, it can be assumed that spray drift from conventional to organic vineyards occurs regularly. Nevertheless, no pesticide residues are detected in most organic wines.
Nay M.M., Grieder C., Frey L.A., Amdahl H., Radovic J., Jaluvka L., Palmé A., Skøt L., Ruttink T., Kölliker R.
Red clover is one of the most important legumes in European forage production. In a multi-year field trial, researchers tested Europe’s largest collection of different red clover accessions at five European locations.