Zachwaszczenie upraw zbożowych w zależności od położenia pól w terenie górskim [Plant communities of cereals with respect to the location of field in mountain region]

Studies on weed infestation of cereals with respect to the location of the field under various mountain conditions (bottom ofthe valley, slopes with different exposure, local top area) were carried out in the central part of the Dunajec valley in the Beskidy Mountains. Plant communities on the slopes and top area contained more species than those in the bottom of the valley. Coverage of soil by weeds on the slopes was also higher. However, slope exposure had no pronounced effect on the differentiation of weed composition. Dominating species in all area where the studies were carried out were: Stellaria media, Galium aparine, Centaurea cyanus, Apera spica-venti and Cirsium arvense .