NPK (Nitrogen, Phosphorous, Potassium) CHART - Organic fertilizers and soil amendments

Manures

N

P

K

Comments

Rabbit manure

2.4

1.4

0.6

Most concentrated of animal manures.

Cow manure

0.6

0.2

0.5

Often contains weed seeds; should be hot composted.

Steer manure

0.7

0.3

0.4

Often contains weed seeds; should be hot composted.

Chicken manure

1.1

0.8

0.5

Fast acting, breaks down quickest of all manures. Use carefully, may burn; Also stinks like congress - composting definitely recommended.

Horse manure

0.7

0.3

0.6

Medium breakdown time.

Duck manure

0.6

1.4

0.5

very low nitrogen levels

Sheep manure

0.7

0.3

0.9

very low phosphorous levels

Worm castings

0.5

0.5

0.3

50% organic material plus 11 trace minerals; Great for seedlings; will not burn; Is a form of compost so does not need composting.