I found an interesting publication that addresses your question (please see the attachment). The authors are ResearchGate members so you can easily request the full text from them.

Regards, Christian

Article Principal methods for isolation and identification of soil m...

thank you for your very positive direction.

You can use Sab agar. Inoculate the agar plate and see what fungi and yeast grow on it. Then you can pick each mould/yeast and inoculate on separate plates and prepare a slide or probably the best would be to extract DNA and analyze using PCR.

thank you,

I use primarily classical identification is the most available means at our university, then I seek another laboratory for the molecular identification (PCR ...).