The study presents data on the occurrence frequency of 19 species of weeds. The degree of weediness of cultivated plants by these species in the soils of various soil-agricultural complexes is described. The relationship species-habitat is discussed.
In the paper there are presented the distribution and abundance of localities of Polycnemum arvense, Herniaria hirsuta and H. glabra in the area of Łódź Elevation. Apart from that, there are the degree and causes of endangerment and an ecessity and conditions of their preservation are indicated.
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