. . . "79042" . "Impact of site conditions and farming practices on the occurrence of rare and endangered weeds on arable land in the Czech Republic"@en . "P(1R55010), S" . "RIV/60460709:41210/13:61944" . . "Soukup, Josef" . "This article documents the impact of site conditions and farming practices on the occurrence of rare and endangered weeds on arable land in the Czech Republic. A survey was conducted between 2006 and 2008 in winter cereals, spring cereals and wide-row crops. The relationship between the occurrence of plants and explanatory factors was analysed using a multivariate analysis to calculate species frequencies in different types of farming, crops and altitudes. In total, 290 releves were recorded, with a total number of 172 weed species. Nineteen weeds, classified as rare and endangered species according to the national Czech list, were identified in 106 releves. The highest effect on the occurrence of rare and endangered weed species was observed for altitude. Almost half of the recorded endangered and rare species belonged to the thermophilous weed vegetation typical for cereals on basic soils. A higher occurrence of endangered species has been confirmed for organic farming, where the sum of frequencies"@en . . "3"^^ . "Impact of site conditions and farming practices on the occurrence of rare and endangered weeds on arable land in the Czech Republic" . "RIV/60460709:41210/13:61944!RIV14-MSM-41210___" . "Kol\u00E1\u0159ov\u00E1, Michaela" . . "41210" . . "0043-1737" . . "3"^^ . "10"^^ . . . . "red list species, conventional farming, organic farming, altitude, crop, syntaxon, frequency, weed cover"@en . . . "Impact of site conditions and farming practices on the occurrence of rare and endangered weeds on arable land in the Czech Republic"@en . "6" . . . . . . . "Impact of site conditions and farming practices on the occurrence of rare and endangered weeds on arable land in the Czech Republic" . "This article documents the impact of site conditions and farming practices on the occurrence of rare and endangered weeds on arable land in the Czech Republic. A survey was conducted between 2006 and 2008 in winter cereals, spring cereals and wide-row crops. The relationship between the occurrence of plants and explanatory factors was analysed using a multivariate analysis to calculate species frequencies in different types of farming, crops and altitudes. In total, 290 releves were recorded, with a total number of 172 weed species. Nineteen weeds, classified as rare and endangered species according to the national Czech list, were identified in 106 releves. The highest effect on the occurrence of rare and endangered weed species was observed for altitude. Almost half of the recorded endangered and rare species belonged to the thermophilous weed vegetation typical for cereals on basic soils. A higher occurrence of endangered species has been confirmed for organic farming, where the sum of frequencies" . . . "Ty\u0161er, Lud\u011Bk" . "[E492052CF6FD]" . "000326546400010" . . "Weed Research" . "53" . . . "GB - Spojen\u00E9 kr\u00E1lovstv\u00ED Velk\u00E9 Brit\u00E1nie a Severn\u00EDho Irska" .