Cevap: kendi humik asitimizi yapama
Biraz once yazdigim siteden humik asit imalati icin aciklanmis patentlerden ucunun linki
http://www.freepatentsonline.com/4319041.pdf
http://www.freepatentsonline.com/8580979.pdf
ww.freepatentsonline.com/8580979.pdf
Biraz once yazdigim siteden humik asit imalati icin aciklanmis patentlerden ucunun linki
http://www.freepatentsonline.com/4319041.pdf
http://www.freepatentsonline.com/8580979.pdf
ww.freepatentsonline.com/8580979.pdf