National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Polní plevele a jejich výskyt ve vybraných polních plodinách
Pfefr, Ladislav
The aim of this thesis was to evaluate the weed infestation of chosen crops on lands of Agrospol a. d., Knínice. The evaluation was carried out in growths of corn, sunflower and opium poppy. The weed infestation was processed by canonical correspondence analysis (CCA). Species as Equisetum arvense, Echinochloa crus-galli, Thlaspi arvense, Veronica persica, etc. were identified in corn. Species Echinochloa crus-galli, Amaranthus sp., Avena fatua, etc. were found in sunflower. Weeds as Symphytum officinale, Equisetum arvense, Chenopodium album, Viola arvensis, etc. occurred in opium poppy.
Analýza aktuálního zaplevelení vybraných širokořádkových plodin
Pfefr, Ladislav
The aim of this thesis was to assess the weed infestation and the effect of crop density on the occurrence of weeds in selected wide-row crops on the land of the agricultural holding Agrospol a. d. Knínice. The weed infestation was assessed in the crops of maize, common sunflower and sugar beet. The weed infestation rate was determined in field conditions using the calculation method. The results were further processed by canonical correspondence analysis (CCA). Species such as Elytrigia repens, Geranium pusilum and Mercurialis annua were found in fields with sparse maize crop. Fallopia convolvulus and Anagallis arvensis prevailed in fields with sparse common sunflower crop. Species such as Chenopodium album, Echinochloa crusgalli and Veronica persica were most common in fields with sparse sugar beet crop.

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