Mini infographic showing examples of high carbon and high nitrogen material. Licensed by CompostMagazine under CC BY 4.0

The Essential Role of the Carbon – Nitrogen Ratio in Composting

If you read much about composting, you’ll soon come across the terms carbon:nitrogen ratio (often shortened to C:N ratio). Everything you put in your compost has a different C:N ratio. Materials such as grass and manure, known as ‘greens’, have a higher level of nitrogen, and ‘brown’ materials, such as paper, have a higher level …

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