This study compares results of observations of winter cereal cultures in the area of the Kotuń parish in two investigated periods (1979-1980 and 1989-1990). In cultures of rye, triticale and winter wheat, 124 species ...

The paper presents results of a study on the occurrence and localization of 30 field weed species in middle-eastern Poland. The species are considered to be regionally and overregionally rare and most of them grow ...

A list of 24 species of weeds was compiled on the basis of phytosocjological researches and floristic records of the biotypes of the Bug River geomorphological territories in the Podlasie region. Four hundred and ...