To study the influence of nitrogen fertilisation and seed density in hemp (Cannabis sativa I.) field trials were carried out in Switzerland and South Germany. A high seed density (30-60 kg/ha) and nitrogen fertilisation did increase stem and bast yields. Nitrogen also increased seed yield, plant height but also lodging. Seed yield was higher at lower seed density (10 kg/ ha). At this plant density no sufficient cover against weeds was observed. Low seed density and also high nitrogen supply may increase difficulties for mechanical grain harvest.<br>We recommend for grain hemp a seed density of at least 30 kg/ha and a maximum nitrogen fertilisation of 50 to 85 kg N/ho. For fibre hemp the maximum nitrogen fertilisation should be 85 to 120 kg N/ha.
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.