Agriculture Reference
In-Depth Information
Typical Mineral Content of USDAOrganic FertilizerIngredients (%)
Animal Source
N
P as P
2
O
5
K as K
2
O
S
Ca
Mg
Fe
Tr
Fish Bone Meal
4
20
0.6
19
0.3
Tr
Fish Meal
10
4.5
0.6
2.3
0.3
Tr
Crab Shell
3
3.25
0.3
0.2
23
0.3
Tr
Blood Meal
13
1
Feather Meal
12
0.1
0.4
0.4
0.6
0.6
Bone Meal
3
15
20
0.4
MineralAmendments and Kelp
N
P as P
2
O
5
K asK
2
O
S
Ca
Mg
Fe
Tr
Ag Lime
32-40
1-5
Dolomite Lime
22
13
Gypsum*
16
22
Oyster shell
36
0.3
Epsom salt
**
14
Potash sulfate
**
51
17.5
TN brown phos
3 (23% total)
40
Tr
Calphos
3 (20% total)
20
Tr
K Mag*
22
22
11
Greensand
1
7
1.3
2.2
9
Tr
Kelp Meal
1
0.7
3
2
2
0.7
Tr
Tr= Good source of micro (trace) minerals
Purified Source
Sulfur S
Boron B
Iron Fe
Mang. Mn
Copper Cu
Zinc Zn
Ag Sulfur
90
Borax
**
9
Solubor™
**
20.5
Fe sulfate 1H
2
O
18
30
Fe sulfate 7H
2
0
**
11.5
20
Mn sulfate 1H
2
O
*
19
32
Cu sulfat
e
5H
2
O
**
12.5
25
Zinc sulfate 1H
2
O
17
35
Zinc sulfate 7H
2
0
**
11
22
**Highly soluble in H
2
O
*Varies in solubility in H
2
O
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