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This research aimed to assess the effect of fertilization with sewage sludge and their mixtures with peat on maize biomass yield and its zinc concentrations, as well as Zn contents in soils with various textures. The research was conducted as a two-factor (soil and fertilization), three-year pot experiment (2003-05). The soil material used for the experiment revealed the texture of weakly loamy sand...
On the basis of obtained results a de-acidifying compost effect was proved. In the subsequent years, irrespective of the applied fertilization, a declining pH value was registered but also an increasing value of soil hydrolytic acidity. The highest acidification rate occurred in the soil with the mineral treatment. During the three year period of the investigations a decline in the organic C content...
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