Average Nitrogen (N), Phosphate (P2O5), and Potassium (as K2O) percent composition of various materials
| Material | %N | %P2O5 | %K2O | Material | %N | %P2O5 | %K2O |
|---|---|---|---|---|---|---|---|
| Alfalfa hay | 2.5 | 0.5 | 2.1 | Leather (ground) | 11.0 | .. | .. |
| Apple, fruit | 0.1 | 0.0 | 0.1 | Lemon culls | 0.2 | 0.1 | 0.3 |
| Barley, grain | 1.8 | 0.8 | 0.5 | Milk | 0.5 | 0.3 | 0.2 |
| Bat guano | 6.0 | 9.0 | .. | Molasses residue in manufacture of alcohol | 0.7 | .. | 5.3 |
| Blood meal | 15.0 | 1.3 | 0.7 | Bone meal | 4.0 | 21.0 | 0.2 |
| Brewer's grains (wet) | 0.9 | 0.5 | 0.1 | Oak leaves | 0.8 | 0.4 | 0.2 |
| Cattail reed & water lily stems | 2.0 | 0.8 | 3.4 | Orange culls | 0.2 | 0.1 | 0.2 |
| Orange skins (ash) | .. | 2.9 | 27.0 | Coal ash (anthracite) | .. | 0.1 | 0.1 |
| Coal ash (bituminous) | .. | 0.5 | 0.5 | Peanuts (seeds) | 3.6 | 0.7 | 0.5 |
| Cocoa shell dust | 1.0 | 1.5 | 2.7 | Peanut shells | 0.8 | 0.2 | 0.5 |
| Coffee grounds | 2.1 | 0.3 | 0.3 | Pigweed (rough) | 0.6 | 0.2 | .. |
| Corn (grain) | 1.7 | 0.7 | 0.4 | Corn (forage) | 0.3 | 0.1 | 0.3 |
| Corncobs (ground and charred) | .. | .. | 2.0 | Cotton seed | 3.2 | 1.3 | 1.2 |
| Cottonseed meal | 7.0 | 2.5 | 1.5 | Cotton waste from factory | 1.3 | 0.5 | 0.4 |
| Cowpeas, green forage | 0.5 | 0.1 | 0.5 | Crab | 2.0 | 3.6 | 0.2 |
| Crabgrass (green) | 0.7 | 0.2 | 0.7 | Dried mussel mud | 0.7 | 0.4 | .. |
| Eggs | 2.3 | 0.4 | 0.2 | Eggshells (burned) | .. | 0.4 | 0.3 |
| Eggshells | 1.2 | 0.4 | 0.1 | Feathers | 15.3 | .. | .. |
| Field bean (shells) | 1.7 | 0.3 | 1.3 | Fire-pit ashes from smokehouses | .. | .. | 5.0 |
| Fish scrap (fresh) | 6.5 | 3.8 | .. | Fresh water mud | 1.4 | 0.3 | 0.2 |
| Gluten feed | 4.5 | .. | .. | Grape leaves | 0.5 | 0.1 | 0.4 |
| Hair | 14.0 | .. | .. | Harbor mud | 1.0 | 0.8 | 0.1 |
| Hoof meal & horn dust | 12.5 | 1.8 | .. | Kentucky bluegrass hay | 1.2 | 0.4 | 1.5 |
| Pine needles | 0.5 | 0.1 | 0.0 | Potatoes (tubers) | 0.4 | 0.2 | 0.5 |
| Potato skins, raw (ash) | .. | 5.2 | 27.5 | Pumpkins, fresh | 0.2 | 0.1 | 0.3 |
| Pumpkin seeds | 0.9 | 0.5 | 0.5 | Ragweed | 0.8 | 0.3 | .. |
| Red clover hay | 2.1 | 0.5 | 2.0 | Residues from raw sugar | 1.1 | 8.3 | .. |
| Salt marsh hay | 1.1 | 0.3 | 0.8 | Sawdust, well rotted | 0.2 | .. | 0.2 |
| Shrimp wastes | 2.9 | 10.0 | .. | Soot from chimney flues | 5.3 | 1.1 | 0.4 |
| Soybean meal | 7.0 | 0.5 | 2.3 | Spanish moss | 0.6 | 0.1 | 0.6 |
| Sweetpotatoes | 0.3 | 0.1 | 0.5 | Tankage | 6.0 | 5.0 | .. |
| Tea leaves (ash) | .. | 1.6 | 0.4 | Tobacco leaves | 4.0 | 0.5 | 6.0 |
| Tobacco stalks | 3.7 | 0.7 | 4.5 | Tobacco stems | 2.5 | 0.9 | 7.0 |
| Tomatoes, fruit | 0.2 | 0.1 | 0.4 | White clover, green | 0.5 | 0.2 | 0.3 |
| Wood ashes, leached | .. | 1.3 | 2.0 | Wood ashes, unleached | .. | 1.5 | 7.0 |
| Worm castings | 0.5 | 0.5 | 0.3 |