| Summary: | The content of N, P2O5, K2O, CaO and MgO was measured in parasitical weeds, as well as in their host plants and in the soil. The soil was also analyzed for its humus content and pH. The statistical analysis of the results justified the ascertation that, on the average, weeds were richer in macroelements then their host plants. In the investigated two groups of plants, both differences as well as similarities in the usage of the mentioned components were found, and the component content in parasites was dependent not only on particular chemical compositions of host plants, but also on soil characteristics.
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