In April, our working group received a Finnish visitor from Sweden, PhD student Kaisa Torppa. Kaisa spent two weeks with us to learn the basics of root staining and microscopy for determination of root colonisation rates. Kaisa is working in SLU (Sveriges Lantbruksuniversitet, Swedish University of Agricultural Sciences) on soil biota of agricultural soils. Mostly she is concentrating on earthworms and nematodes but now also getting to know the world of AM fungi. During her stay, she also presented a small seminar and shared her experiences with soil biota in agriculture. We thank Kaisa for the exiting discussions and welcome her back in the future!