During the years 2006-2009 the study on the production experiment located on permanent meadow, in conditions of proper dray-ground meadow on black degraded soil was conducted. The effects of fertilization with mineral fertilisers (PK), solid manure and liquid manure at two levels: 60 kg N ha -? and 90 kg N ha -? was compared. It was found that the applied fertilisation contributed to the increase in the grass proportion, a drop in the share of herbs and weeds at both levels of fertilization. The dominant grasses were: Kentucky bluegrass (Poa pratensis L.), meadow foxtail (Alopecurus pratensis L.), annual ryegrass (Lolium multiflorum L.), perennial ryegrass (Lolium perenne L.), meadow fescue (Festuca pratensis L.), tall fescue (Festuca arundinacea Schreb.), orchardgrass (Dactylis glomerata L.), tall oatgrass (Arrhenatherum elatius PB), erect brome (Bromus erectus Huds.), quackgrass (Elymus repens (L.) Gould), rough bluegrass (Poa trivialis L.). The increase of legumes share was the greatest on object without nitrogen fertilisation (PK). For all experimental objects a decline in the share of dandelion (Taraxacum officinale FH Wigg.) was noted. The smallest annual dry matter yields in the objects only with phosphorus and potassium fertilisation were obtained. Fertilisation of meadow with liquid manure, at both levels (N-60 and N-90) showed significantly higher yielding effect than solid manure. The N balance showed large negative results on all experimental objects and the most negative values were found in case of fertilisation only with phosphorus and potassium. When solid manure and liquid manure were applied and particular on the second N level, they reported less negative results.