Acta Scientiarum Polonorum
Silvarum Colendarum Ratio et Industria Lignaria

Abstract The study comments the results of evaluation of degree reconstruction of different types of nurse crop stands in relation to their position: altitiude, exposition with regard to cardinal points, inclination of slope and the type of neighbourhood. The investigations were based on the results of the periodical inventory of mountain nurse crop stands occur-rent in Forest Experimental Station in Krynica. In this study it was affirmed that nurse crop stands being at present 47-52 year-old, had species composition: compatible with the site in 11.6%, partly compatible with the site in 24.5%, and 64.0% of stands had species composition incompatible with the site. The most favorable changes were in larch and next in alder and pine stands. It was observed that reconstruction ran more intensively in stands situated at a higher level, on ornate slopes, close to the south expositions and in the neighbourhood with stands compatible with the site.