A field experiment was carried in central-eastern Poland in the years 2000–2003. The effect of organic fertilization and liming of soil on yielding of celeriac ‘Odrzański’ cv., was analysed. The following types of organic fertilizers were applied: farmyard manure 60 t·ha^-1, rye straw 6 t·ha^-1, and green manures in the form of summer intercrops (phacelia, rye, winter vetch, faba bean). The soil was limed with 2 t·ha^-1 of the common calcium carbonate fertilizer. Celeriac was cultivated just before organic fertilizers were ploughed in. Analysis of the results indicates the dependence of yield on climatic conditions also. The greatest yields of celeriac were obtained after farmyard manure. Faba bean and phacelia were characterized by a very similar yield-forming effect to that of farmyard manure. The highest yields were obtained on limed soil.

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