Beschreibung:
Long-term effects of cornplete deep-soil cultivation on forest growth and yield were evaluated in an experiment initiated in 1988 on six different sites in Sweden. Complete deep-soil cultivation was compared with less intensive site preparation. Ten years after the start. growth. stand structure. damage and survival were evaluated. Conifer seedling growth and survival on sandy sites, frost-prone sites or both. generally increased following deepsoil cultivarion compared to patch scarification. Silty sites exposed to sunilner frost mere also positively affected by deep-soil cultivation. although the risk of frost-heaving increased. For deciduous seedlings the result varied. but survival in birch was improved by deep-soil cultivation. On former farmland. deep cultivation may effectively control competing vegetation. Deep-soil cultivation in strips ober half the area appeared to be as efficient as complete treatment. This has financial and environmental implications. Deep cultivation reduced variability in tree size ...