Polní plevele a jejich výskyt na pozemcích vybraného zemědělského podniku

The aim of the thesis was to find out the actual weed infestation of selected crops at Mr. Bělín´s farm, which is situated in the Olomouc region in a village called Čelčice. The monitoring was carried out in winter wheat, spring barley, winter rape and sugar beet. Evalution was carried out counting methods and the results of the weed infestation evaluation were processed with the DCA analysis. The canonical corespondence analysis showed that in the winter wheat were found : Tripleurospermum inodorum, Stellaria media, Galium aparine, Lamium purpureum, Brassica napus. In the spring barely were: Capsella bursa-pastoris, Stellaria media, Lamium purpureum, Thlaspi arvense, Galium aparine. In winter rape were: Lamium purpureum, Capsella bursa-pastoris, Tripleurospermum inodorum, Stellaria media, cereals. In sugar beet were: Galium aparine, Chenopodium album, Tripleurospermum inodorum, Amaranthus retroflexus, Polygonum lapathifolium, Atriplex patula