Content of PAHs in soil of a hazel orchard depending on the method of weed control - S. J. Krzebietke; J. Wierzbowska; P. J. Żarczyński; S. Sienkiewicz; M. Bosiacki; B. Markuszewski; A. Nogalska; E. Mackiewicz-Walec (Environmental Monitoring and Assessment, 2018)