How does the biodegradation rate of cedar compare to eucalyptus in landfills?

The biodegradation rate of wood in landfills varies depending on the type of wood and environmental conditions. Cedar and eucalyptus, two commonly used woods, exhibit different decomposition behaviors in landfill environments.

Cedar, known for its natural resistance to decay due to high levels of extractives like thujaplicins, decomposes more slowly in landfills. Its dense cellular structure and antifungal properties further delay microbial breakdown, making it persist longer in anaerobic landfill conditions.

In contrast, eucalyptus decomposes faster due to its lower natural decay resistance and higher cellulose content, which is more easily broken down by microorganisms. However, landfill conditions—such as limited oxygen, moisture, and microbial activity—still slow its decomposition compared to natural environments.

Studies suggest that cedar may take decades to fully degrade in landfills, while eucalyptus breaks down more quickly but still contributes to long-term waste accumulation. Both woods release methane during anaerobic decomposition, but cedar's slower rate may result in prolonged emissions.

Understanding these differences helps in assessing the environmental impact of wood waste and informs sustainable disposal practices. Proper composting or recycling may be preferable to landfill disposal for both wood types.