Replant diseases in fruit production affect tree growth and reduce yields when orchards are replanted. In 2008, a survey conducted by Agroscope ACW revealed an increase in replant problems in Swiss apple orchards. Investigations on two apple orchards where trees had been planted in altered row distance, have shown significantly better growth and higher yield for trees on the old grass lane compared to those on the old tree row. Apple seedlings grown in the soil from replanted tree rows showed significantly better growth when the soil was sterilized, demonstrating the biotic nature of the poor tree growth in these orchards. In 2009, two field trials were started at ACW to investigate the usefulness of pre-plant soil treatments and different rootstock genotypes in controlling apple replant problems. Collaboration with other research institutes has been initiated for the investigation of the complex etiology of apple replant problems.
Tall oat grass and golden oat grass are typical hay-meadow grasses that are also suitable for forage mixtures. Of the four tall and three golden oat grass varieties tested, only one new variety of tall oat grass is likely to make it onto the List of Recommended Varieties.
Stevenel P., Wendling M., Brabant C., Suss H., Savoyat C., Dierauer H., Mascher F., Charles R.
FiBL and Agroscope investigated bread wheat varieties to determine their yield and quality stability. The results show that the choice of variety must be adapted to the site and that high yield potential does not go hand-in-hand with a high protein content.
Adapted and high-yielding varieties of forage plants are important for Switzerland as a grassland country. Hybrid ryegrass is a versatile forage grass that, thanks to breeding advances, has become even more persistent, disease-resistant and high-yielding over the past 30 years.