Na podstawie wyników dwóch wieloletnich doświadczeń określono pobranie miedzi, manganu i cynku przez rośliny uprawiane w zmianowaniu i ich zawartości w glebach. Wyliczono, że jedna jednostka zbożowa pobiera średnio: Cu - 0,68 g; Mn - 5,78 g i Zn - 4,62 g. Stosowanie obornika i gnojowicy oraz łącznego nawożenia NPK z obornikiem korzystnie wpływa na zrównoważenie w glebie bilansu mikroelementów.
In the years 2000-2002 an effect of natural fertilizers: manure and liquid manure as well as mineral ferilizers on the certain meadow sward components contents were compared. Each fertilization kind negatively affected the Ca content of the meadow sward. On the contrary, mineral ferilization with the manure and higher portions of the liquid manure influenced positively the other components amounts (P, K, Mg, Na).
In 2000-2002 an effect of the natural fertilizers on the floral composition as well as on the meadow sward yield was examined. It was found that the meadow fertilization with natural fertilizers is appropriate, because under the relatively low costs distinct incereases of the dry matter yield — 21%, total protein — 25% and water soluble saccharides - 16% can be obtain. Almost 50% lower yield of the fertilization components of the manure and liquid manure when compared with the mineral fertilizers, expressed in the growth of the hay yield and total protein, was recompensed with the richer botanical composition of the meadow sward, especially with the presence of the white clover.