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  1. E

    Microorganisms in maize soil

    Microorganisms in soil
  2. E

    Biological mediated Nitrogen supply of soil by mineral fertilizer

    Picture 28 Nitrogen supply of a cultured soil by mineral fertilizer The advantages of a biologization of chemical mineral fertilizers (semi-schematically illustrated) Extensive tests have shown that any type of mineral fertilizer can be improved by adding the corresponding lithobiontic...
  3. E

    Soil lives! Soil lives! Life and Work of Annie Francé-Harrar

    Soil lives! Life and Work of Annie Francé-Harrar With pdf of exhibition catalog.
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