Nitrogen Content

Nitrogen Content and Carbon-to-Nitrogen Ratios For Composting Waste Materials
Material Nitrogen (% of Total Weight) Ratio of Carbon to Nitrogen (C:N)
Activated sludge 5-6 6:1
Alfalfa 2.4-3 16-20:1
Blood 10 – 14 3:1
Bone meal   3.5:1
Bread 2.1  
Buttercup 2.2 11:1
Cabbage 3.6 12::1
Carrot; whole 1.6 27:1
Clover; red 1.8 27:1
Cocksfoot 2.55 7:1
Cottonseed meal   5:1
Fern 1.15 43:1
Fish scrap 6.5 – 10 5.1:1
Garbage; green 3 6:1
Garbage; raw 2.15 25:1
Kentucky bluegrass 2.4 7:1
Lawn clippings; young 4 12:1
Lettuce 3.7  
Manure; farmyard (avg.) 2.15 2:1
Manure; chicken 3.2 7:1
Manure; cow 1.7 6:1
Manure; horse 2.3 25:1
Manure; human 5.5 – 6.5 6-10:1
Manure; pig 3.75  
Manure; poultry 6.3 3:1
Manure; sheep 3.75  
Manure; steer 1.35 25.3:1
Meat scraps 5.1  
Milorganite(TM)   5.4:1
Mustard 1.5 26:1
Newspaper 0.05 812:1
Oat straw 1.05 48:1
Onion 2.65 3:1
Peanut hull meal 11:1
Pepper 2.6 3:1
Pigweed (Amaranthus sp.) 3.6 11:1
Potato tops 1.5 25:1
Purslane 4.5 8:1
Ragwort 2.15 9:1
Sawdust; raw 0.11 511:1
Sawdust; rotted 0.25 208:1
Seaweed 1.9 7:1
Sewage; fresh 11:1
Slaughterhouse wastes 7-10 2:1
Soybean meal 5L1
Timothy grass 0.85 58:1
Tobacco 3 1:1
Tomato 3.3 12:1
Turnip tops 2.3 7:1
Turnip; whole 1 44:1
Urine 15-18 .8:1
Vegetables; non-legume 2.54 11-19:1
Wheat flour 1.7  
Wheat straw 0.3 128:1
Wood; white fir 0.06 767:1

Download printable version

Return to appendix menu