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Between 2005 and 2008 in Swadzim, on the fields of the Experimental and Didactic Station Gorzyń, a department of Poznań University of Life Sciences, the two one factor trials have been carried out on two soil complexes: rye and good wheat ones. The purpose of the study was to determine changes of selected chemical properties of soils under the influence of the use of natural fertilizers, straw or...
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