In conclusion, spent mushroom compost can be used as
seedling cultivation media or can be added into the media
at certain rates. In this research, spent mushroom compost
positive impact, seedling development. However, salt
content is a restrictive factor in the determination of the
amount of use. Söchtig and Grabbe (1995) emphasized
the importance of the salt content. Erkel (1990) reported
that waiting the compost in the open for 1-1.5 years and
reutilizing it after being washed 5-6 times was appropriate