The occurrence of arbuscular mycorrhizal fungi (AMF) in cultivated soils of Poland was characterized based on 15-year investigations. Spores of AMF were isolated from both field-collected root-rhizosphere soil mixtures and trap cultures established with a part of these mixtures. The mixtures were collected from under 41 plant species. The plant species most frequently sampled were <i>Hordeum vulgare, Triticum aestivum</i>, and <i>Zea mays</i>. Spores of AMF were found in 97,5% of the field-collected root-soil samples and in 95,5% of trap cultures. The AMF predominating in populations of the spores revealed were members of the genus <i>Glomus</i>. The spores recovered belonged to 36 species. The AM fungal species most frequently occurring in cultivated soils of Poland were <i>Glomus caledonium, G.constrictum, G.deserticola</i>, and <i>G.mosseae</i>.
Polish Endogonaceae 1. Acaulospora bireticulata, Entrophospora infrequens, Glomus caledonium, and Scutellospora pellucida