The researchers studied how mixing rice straw ash and food waste at different ratios affects compost quality. They wanted to see how the initial carbon to nitrogen ratios (C:N) of 20, 25, and 30 would impact the composting process. They found that a C:N ratio of 30 led to higher temperatures for longer periods, which helps kill pathogens. This ratio also resulted in the best final C:N ratio and germination index. The pH and moisture content of the compost mixtures were within the ideal range for mature compost.