The aim of the study was to determine the physico-chemical status of soil, vegetation and fauna of soil Acari on the afforested post-military area By-dgoszcz-Jachcice. Two-year old Scots pine seedlings - produced at zoo-melioration treatment applied - were used for afferestation. Investigations were conducted in the year 2008. Experiment was run as two-factorial trial. The first row factor was the way of preparation of the area destined for afforestation: main plot which was previously sown with lupin (A) and the main plot without this sowing (B). The second row factor was the way of seedling production used at forest nursery school (subplots): 1 – compost with addition of bark, without mulching, 2 – compost with addition of bark, with mulching, 3 – compost with addition of sawdust, without mulching, 4 – compost with addition of sawdust, with mulching. Soils of the studied area were classified as rusty soils formed from loose sand. Occurrence of slightly loamy sand characterized by the clay fraction (< 0,002 mm) content, was found on all the plots in the range 4–6%. Differentiation of Corg content ranged from 10,5 to 14,4 g.kg-1. C/N ratio ranged from 17,0 to 23,6. All the plots were characterized by the strongly acid reaction (exchangeable acidity pH in the range from 4,07 to 4,55). Studied area was char-acterized by dominance of grasses, mainly Poa nemoralis, Deschampsia caespi-tosa and Anthoxantum aristatum L. which are connected with dry environment with low fertility. There were no significant differences in the growth of Scots pine on the area which was previously sown with lupin and that without this sow-ing (control). Scots pine plants obtained from seedlings produced at mulching treatment applied were characterized by the highest sum of increments of lateral shoots in the last whorl (verticil). The abundance of mites in the studied area was low with dominance of Actinedida. Saprophage oribatid mites amounted 2,51% and only 0,47% of all mites, in the plot which was previously sown with lupin, and on the non-sown with lupin, respectively. Species diversity of oribatid mites was low – 6 species.