Ondersoekinge oor die koolstof- en stikstof-vereistes van, en die invloed van organiese reste op Helminthosporium sativum P.K. en B. by Baard, S. W.(Schalk Willem)

Subjects: “…Helminthosporium sativum…”
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The effect of soil amendment and the soil microflora on the survival of Helminthsporium sativum, the crown rot pathogen of wheat, in a virgin soil from the western Transvaal by Jooste, W. J

Subjects: “…Helminthosporium sativum…”
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