I don't have a copy, and can't access one, but this reference might possibly be of use to you:

Liebeke, M., Brözel, V.S., Hecker, M. et al. Appl Microbiol Biotechnol (2009) 83: 161. doi:10.1007/s00253-009-1965-0

Hi Moni

The soil extract can be prepared by mixing 5g of soil in 1L H2O mix well, filter and then autoclave.

You don't have to use soil extract to isolate Actinomycetes you can use any other medium that contained two different antibiotics for inhibition of fungi such as nystatin and streptomycin for inhibition of bacteria.

Hope this help. 

Thank you so much !