See the following table to get an idea of C:N different materials contain.
Material C:N
- Vegetable wastes 16:1 (avg)
- Coffee grounds 20:1
- Grass clippings 19:1 (avg)
- Cow manure 20:1
- Horse manure 25:1
- Poultry manure 10:1
- Foliage 55:1 (avg)
- Corn stalks 60:1
- Straw 70:1 (avg)
- Bark 115:1 (avg)
- Paper 175:1 (avg)
- Wood chips & sawdust 300:1 (avg)
This information came from Composting to Reduce the Waste Stream, Northeast Regional Agric. Eng. Service Cooperative Extension
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