A comparison trial between various feed strategies (crop rotation versus ley) was established in 2009 in the western part of Switzerland, at an altitude of 390 m. From 2010, two water regimes were tested, corresponding to the average annual amounts of 900 mm (local rainfall) and 1200 mm (additional water supply by drop irrigation). During periods of drought in 2010 and 2011, water supplies were the most effective on grass-clover mixtures. A quantity of ten liters of water per square meter has increased performance of 120 kg DM/ha, while the increase was only 50 kg DM/ha for maize. In contrast, a sharp deterioration in the botanical composition of leys was observed from the third year. It was accompanied by a steady decline in production. The effect of additional water supply results in a small decrease in N contents for all crops and an increase in K content of grass-legume mixtures (luxury consumption). The contents of the other elements analyzed (P, Ca and Mg) have been little affected. This study highlights the weaknesses of grassland during drought and the benefits of maize and alfalfa.
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.