EN
The aim of the study was to compare the grain nutrients and protein yield of spring barley varieties (Rastik, Rataj) depending on various kinds of crop protection (extensive vs. intensive). Extensive cultivation of naked barley caused a decrease of protein and fat contents in the grain as well as an increase of ash and N-free extract. As for unhusked barley, the contents of protein, fibre and ash decreased whereas that of N-free extract increased. The contents of fat in the spring barley grain showed the slightest changes. As for the protein yield, the barley intensively cultivated (558.6 kilos per hectare) gave better results (by 20%) than the one extensively cultivated. Growing spring barley in a 3-year monoculture caused a 15% decrease of yield as compared with the rotated crop.