The distribution of weeds in natural alfalfa seeds

In this study the presence of seeds of various weed species in natural alfalfa seed of different cultivars from different localities. In all studied cultivars of alfalfa and in all localities was found 25 different weed species, of which 14 species were perennial weeds, while the other 11 were annual weed species. Since dangerous perennial weeds which proliferate by vegetative and generative identified by (Sorghum halepense and Cirsium arvense). The highest number of weed seeds had annual species Picris echioides L. cultivar K-22 at the site Ratari 446 seeds. Also a large number of seeds was determined and the perennial species Cichorium intybus L. in all the cultivars of alfalfa. The lowest number of seeds were found in the species Rumex sp. four seeds and only the cultivar NS-Mediana at the site Backo Gradiste I, as with species Conium maculatum seven seeds only in the cultivar K-28 at the site Banatsko Karađorđevo. Most weeds species present (nine) was found in alfalfa cultivars NS-Mediana at the site Backo Gradiste I, and while the lowest number of weeds species (two) was found in the cultivar Banjalucanka at the site Kozarska Dubica.