Hi deepgis, I hope that these links may help you... luck
http://www.sciencepub.net/nature/ns0808/12_3001_ns0808_104_115.pdf
http://www.academicjournals.org/journal/AJAR/article-full-text-pdf/D00C9C238184
http://www.uni-miskolc.hu/~ecodobos/0649.pdf
https://www.researchgate.net/post/Is_it_possible_to_recognize_soil_type_by_satellite
http://www.fao.org/docrep/004/y0785e/y0785e05.htm
http://www.earsel.org/Advances/2-3-1993/2-3_05_Ming.pdf
http://watershed.kar.nic.in/website_dec2006/features/useof_IT.pdf