Making and Using CompostUnit 1.7 | 39Appendix 3: C:N Ratio of Common Compost
Materials
Fresh chicken manure (laying) 6:1
Tomato processing waste 11:1
Vegetable waste 12:1
Alfalfa hay 13:1
Fresh chicken manure (broiler) 14:1
Sheep manure 16:1
Fresh turkey manure 16:1
Grass clippings 17:1
Seaweed 19:1
Fresh cattle manure 19:1
Rotted manure 20:1
Apple pomace 21:1
Fresh horse manure 22:1
Grape pomace 28:1
Legume shells 30:1
Cereal hay 32:1
Dry leaves 40–80:1
Corn stalks 50:1
Oat straw 74:1
Grain chaff and hulls (e.g., rice hulls) 80–120:1
Straw 80:1
Timothy hay 80:1
Paper 170:1
Newsprint, cardboard 400:1
Sawdust 400:1
Wood chips, shavings 500+:1
MATERIAL C:N RATIO
Appendix 3
From Start with the Soil, by Grace Gershuny. Used by permission of Chelsea Green Publishing Co.Optimum
C:N range