EN
Spring 1997 as result considerable reductions of species, executed oversowing of sward dominated by Dactylis glomerata and Bromus inermis with Trifolium pratense var. 'Hruszowska' seeds. Sward cutted 2 and 3 times and used diverse nitrogen fertilization (0,60, 120 kg ha⁻¹ N). Results of investigations showed, that sward 3 times cutting yielding higher. Nitrogen fertilization caused significant increase of yielding and eliminated legumes plant from sward. Objects fertilised with 120 kg ha⁻¹ N participation of legumes was 3-16%.