The aim of the study was to determine the influence of mulching and organic fertilization on the seedling vigour of Scots pine and occurrence of soil mites (Acari) in forest- and post-arable soils. Two different field experiments were carried out in the vegetation period of the year 2005 on light soils at two different sylvan-natural regions. The first trial was conducted at Białe Błota near Bydgoszcz – on a brown podzolic soil. The second experiment – at Lipnik near Stargard Szczeciński – on an acid brown soil. The experiments were run in a split-plot system with four replications. Two different factors were compared. The first row factor was fertilization, used in the two following treatments: N1 – treated sewage sludge (⅔) + bark (⅓) and N2 – treated sewage sludge (⅔) + sawdust (⅓). The second row factor was mulching, used in the two variants: C – without mulching (control) and S – mulching with litter. Scots pine seedlings grown on the forest soil at Białe Błota were characterized by increased height than those cultivated on the post-arable land at Lipnik. The best results, both on the forest soil as well as on the post-arable ground, were obtained in the ...
