This document summarizes a study on hydrogen production from cellulosic materials using natural microbial associations. The researchers isolated natural associations from soil and lake sediment and found that the soil association was most effective, dominated by Clostridium and Bacillus genera. Enriching this association with a 1:2.5 ratio of Clostridium to Bacillus microorganisms increased hydrogen yield by 48% and hydrogen content in the biogas to 87.5%. Using agricultural waste as the substrate and enriching with dominant microorganisms reduced processing time.