The actual nutrient content may vary from what is listed, depending upon the manufacturer, the purity of the product, or other materials blended with the product. Most values are for the fertilizer-grade product and not the pure chemical. The chemical formulas given are for the primary active compound.
Primary and Secondary Nutrient Sources
|
| Material |
Percentage
|
Approx. CaCO3
Equiv./100 lb.† |
Comments |
| N |
P2O5 |
K2O |
Ca |
Mg |
S |
|
| Nitrogen Materials |
|
Ammonium nitrate‡
NH4NO3 |
34 |
0 |
0 |
0 |
0 |
0 |
-61 |
|
|
Ammonium nitrate limestone
NH4NO3 + (CaCO3 + MgCO3) |
20 |
0 |
0 |
6 |
4 |
0 |
0 |
Ca and Mg depend on limestone used |
|
Ammonium nitrate sulfate
NH4NO3 + (NH4)2SO4 |
30 |
0 |
0 |
0 |
0 |
5 |
-71 |
|
|
Ammonium sulfate‡
(NH4)2SO4 |
21 |
0 |
0 |
0 |
0 |
24 |
-110 |
|
|
Anhydrous ammonia‡
NH3 |
82 |
0 |
0 |
0 |
0 |
0 |
-148 |
Pressurized gas |
|
Aqua ammonia
NH4OH |
16-25 |
0 |
0 |
0 |
0 |
0 |
-36 to -54 |
|
|
Calcium cyanamide
CaCN2 |
21 |
0 |
0 |
11 |
0 |
0 |
+63 |
Most alkaline N material |
|
Calcium nitrate
Ca(NO3)24H2O |
15 |
0 |
0 |
21 |
0 |
0 |
+20 |
|
|
Calcium nitrate/urea (Calurea)
Ca(NO3)2 + 4CO(NH2)2 |
34 |
0 |
0 |
10 |
0 |
0 |
-36 |
Don't blend with superphosphate |
|
Crotonylidene diurea
(CDU) |
32 |
0 |
0 |
0 |
0 |
0 |
NA |
Slow-release |
|
Isobutylidene diurea
(IBDU) |
31 |
0 |
0 |
0 |
0 |
0 |
NA |
Slow-release |
|
Nitrogen solutions (N-SOL or UAN solutions)‡
(urea/ammonium nitrate):
32% UAN (35% urea + 45% A.N.)
30% UAN (33% urea + 42% A.N.)
28% UAN (30% urea + 40% A.N.)
21% AN (60% A.N. + 40% water)
19% AN (54% A.N. + 46% water) |
32
30
28
21
19 |
0
0
0
0
0 |
0
0
0
0
0 |
0
0
0
0
0 |
0
0
0
0
0 |
0
0
0
0
0 |
-55
-52
-49
-37
-33 |
Solutions code:
320(0-45-35)
300(0-42-33)
280(0-40-30)
210(0-60-0)
190(0-54-0) |
|
Potassium nitrate
KNO3 |
13 |
0 |
44 |
0 |
0 |
0 |
+26 |
|
|
Sodium nitrate (nitrate of soda)
NaNO3 |
16 |
0 |
0 |
0 |
0 |
0 |
+29 |
|
|
Urea‡
CO(NH2)2 |
45 |
0 |
0 |
0 |
0 |
0 |
-81 |
|
|
Urea (sulfur coated)
CO(NH2)2 + S |
36-38 |
0 |
0 |
0 |
0 |
13-16 |
-118 |
N release depends on S coating |
|
Ureaform
(urea + formaldehyde) |
38 |
0 |
0 |
0 |
0 |
0 |
-68 |
Slow-release |
|
| Phosphorous Materials |
|
Ammoniated superphosphate |
12-17 |
22-35 |
0 |
* |
0 |
* |
-7 |
|
|
Ammonium phosphate‡
Diammonium phosphate (DAP)
(NH4)2H2PO4
Monoammonium phosphate (MAP)
NH4HPO4 |
18
11 |
46
48 |
0
0 |
0
1 |
0
0 |
0
0 |
-70
-65 |
|
|
Ammonium phosphate nitrate
NH4H2PO4.NH4NO3 |
30 |
10 |
0 |
0 |
0 |
0 |
-54 |
|
|
Ammonium phosphate sulfate
4NH4H2PO4. x (NH4)2SO4 |
16 |
20 |
0 |
0 |
0 |
15 |
-76 to -113 |
Mixture |
|
Ammonium polyphosphate‡
(NH4)HP2O7 + (NH4)5P3O10 |
10 |
34 |
0 |
0 |
0 |
0 |
— |
Liquid |
|
| Basic Slag |
0 |
0-6 |
* |
3-29 |
* |
* |
+70 |
Analysis variable |
|
Bone meal (steamed)
Ca3(PO4)2 + CaCO3 |
0-2 |
10-20 |
0 |
19-25 |
0 |
0 |
+20 |
|
|
Concentrated superphosphate‡
(triple superphosphate)
Ca(H2PO4)2. x H2O |
0 |
46 |
0 |
14 |
0 |
2 |
0 |
|
|
| Nitric phosphate |
12-17 |
22-35 |
0 |
* |
0 |
* |
-20 |
|
|
Normal superphosphate
Ca(H2PO4)2. x H2O + CaSO4 |
0 |
20 |
0 |
21 |
0 |
11 |
0 |
|
|
| Phosphate rock |
0 |
2-35 |
0 |
* |
* |
0 |
+10 |
Total P2O5 relatively unavailable |
|
Phosphoric acid‡
H3PO4
Wet-process acid
Concentrated wet-process acid
Superphosphoric acid |
0
0
0 |
30
40-54
76 |
0
0
0 |
0
0
0 |
0
0
0 |
0
0
0 |
-63
-84 to -110
-110 |
Liquid |
|
| Urea-ammonium phosphate |
23 |
35 |
0 |
0 |
0 |
0 |
|
Research mixture |
|
Urea phosphate
CO(NH2)2 + H3PO4 |
17 |
44 |
0 |
0 |
0 |
0 |
-82 |
Research |
|
| Potassium Materials |
|
| Greensand |
0 |
1 |
6 |
0 |
0 |
0 |
|
Natural low-grade, mineral |
|
Potassium carbonate
K2CO3 solid
K2CO3 liquid |
0
0 |
0
0 |
48
34 |
0
0 |
0
0 |
0
0 |
+70
+50 |
|
|
Potassium chloride‡
KCl(muriate of potash) |
0 |
0 |
60 |
0 |
0 |
0 |
0 |
Most widely used, single fertilizer material |
|
Potassium magnesium sulfate‡
(sulfate of potash magnesia)
K2SO4.2MgSO4 or
MgSO4.K2SO4.6H2O |
0 |
0 |
21 |
0 |
11 |
23 |
0 |
|
|
Potassium metaphosphate
KPO3 |
0 |
59 |
39 |
0 |
0 |
0 |
* |
|
|
Potassium nitrate (nitrate of potash)
KNO3 |
13 |
0 |
44 |
0 |
0 |
0 |
+26 |
|
|
Potassium sulfate (sulfate of potash)
K2SO4 |
0 |
0 |
52 |
0 |
0 |
16 |
0 |
|
|
| Calcium Materials |
|
Calcium chloride
CaCl2 |
0 |
0 |
0 |
36 |
0 |
0 |
0 |
Water soluble |
|
Burned lime
CaO |
0 |
0 |
0 |
70 |
0 |
0 |
+178 |
|
|
Calcitic limestone‡ (ground)
CaCO3 |
0 |
0 |
0 |
36 |
0 |
0 |
+95 to 100 |
|
|
Dolomitic limestone** (ground)
CaCO3 + MgCO3 |
0 |
0 |
0 |
24-30 |
6-12 |
0 |
+95 to 108 |
|
|
| Selma chalk |
0 |
0 |
0 |
32 |
0 |
0 |
+80 |
|
|
Gypsum‡
CaSO4. 2H2O |
0 |
0 |
0 |
22 |
0 |
18 |
0 |
Solubility = 0.02 lb./gal. |
|
Hydrated lime
Ca(OH)2 |
0 |
0 |
0 |
50 |
0 |
0 |
+134 |
Solubility = 0.01 lb./gal. |
|
| Magnesium Materials |
|
Dolomitic limestone‡ (ground)
CaCO3 + MgCO3 |
0 |
0 |
0 |
24-30 |
6-12 |
0 |
+95 to 108 |
Analysis variable; must contain at least 6% Mg |
|
Magnesium ammonium phosphate
MgNH4PO4.6H2O |
8 |
40 |
0 |
0 |
15 |
0 |
|
Solubility = 0.001 lb./gal. |
|
Magnesium oxide
MgO |
0 |
0 |
0 |
0 |
45 |
0 |
+250 |
Solubility = 0.00062g/100g
0.001 oz./gal. |
|
Magnesium sulfate‡ (epsom salt)
MgSO4.7H2O |
0 |
0 |
0 |
0 |
10 |
13 |
0 |
Solubility = 7.6 lb./gal. |
|
Magnesium sulfate (Kieserite)
MgSO4.H2O |
0 |
0 |
0 |
0 |
17 |
23 |
0 |
Solubility = 4.7 lb./gal. |
|
Potassium magnesium sulfate‡
(sulfate of potash magnesia)
K2SO4.2MgSO4 |
0 |
0 |
21 |
0 |
11 |
23 |
0 |
Soluble |
|
| Sulfur Materials |
|
Ammonium sulfate‡
(NH4)2SO4 |
21 |
0 |
0 |
0 |
0 |
24 |
-110 |
Available in prilled or water-soluble crystals |
|
Ammonium thiosulfate‡ (60% solution)
(NH4)2S2O3 |
12 |
0 |
0 |
0 |
0 |
26 |
|
Liquid; reacts with alkaline materials |
|
Elemental sulfur (S):
Wettable S
Flowable S
Flowers of S |
0
0
0 |
0
0
0 |
0
0
0 |
0
0
0 |
0
0
0 |
90-100
52-70
90-100 |
-312
-218
-312 |
Elemental S must be oxidized to sulfate before available to
plants |
|
Gypsum‡
CaSO4.2H2O |
0 |
0 |
0 |
22 |
0 |
18 |
0 |
|
|
Magnesium sulfate (epsom salt)
MgSO4.7H2O |
0 |
0 |
0 |
0 |
10 |
13 |
0 |
Soluble |
|
| Potassium magnesium sulfate‡ |
0 |
0 |
21 |
0 |
11 |
23 |
0 |
|
|
Potassium sulfate
K2SO4 |
0 |
0 |
52 |
0 |
0 |
16 |
0 |
Soluble |
|
Sulfuric acid
H2SO4 |
0 |
0 |
0 |
0 |
0 |
20-26 |
-62 to -81 |
Liquid; highly reactive |
|
†Negative value indicates net acidifying effect on soil; positive value indicates net basic reaction in soil.
‡Commonly available materials
* Present in undetermined amounts
Symbol Key: N = Nitrogen; P2O5 = Phosphate; K2O = Potash; Ca = Calcium; Mg = Magnesium; S = Sulfur; CaCO3 = Calcitic Limestone |
|
Micronutrient Materials
|
| Materials |
Nutrient Content |
|
| Copper (Cu) |
|
Chelated Cu*:
Cu EDTA
Cu HEDTA |
13% Cu
9% Cu |
|
Cupric ammonium phosphate
Cu(NH4)PO4.H2O |
30% Cu |
|
| Cupric Oxide (CuO) |
60-80% Cu |
|
Copper sulfate*:
CuSO4.H2O
CuSO4.5H2O
CuSO4.3Cu(OH)2 |
35% Cu
25% Cu
13-53% Cu |
|
| Copper frits |
40-50% Cu |
|
| Copper polyflavonoid |
6% Cu |
|
| Boron (B) |
|
Borax (sodium tetraborate decahydrate)
Na2B4O7.10H2O |
11% B |
|
| Boric acid (H3BO3) |
17% B |
|
| Boron frit/sodium borosilicate |
6% B |
|
Calcium borate (colemanite)
Ca2B6O115H2O |
10% B |
|
Fertilizer borate* (sodium tetraborate)
Borate Granular (Na2B4O7.5H2O)
Borate 48 |
14% B
15% B
48 refers to percentage B2O3 |
|
Solubor*
Na2B4O7 |
20% B
66% B2O3 |
|
Magnesium borate (boracite)
2Mg3B8O15.MgCl2 |
21% B |
|
| Iron (Fe) |
|
| Basic slag |
10-13% Fe |
|
| Ferric sulfate Fe2(SO4)3.4H2O |
20% Fe |
|
| Ferrous sulfate* FeSO4.7H2O |
20% Fe |
|
Ferrous ammonium sulfate
(NH4)2SO4.FeSO4.6H2O |
14% Fe |
|
Ferrous ammonium phosphate
Fe(NH4)PO4.H2O |
29% Fe |
|
| Ferrous oxalate FeC2O4.2H2O |
30% Fe |
|
Ferrous carbonate
FeCO3.H2O |
42% Fe |
|
Iron chelates*:
Fe DTPA
Fe EDTA
Fe EDDHA
Fe HEDTA |
10% Fe
9-12% Fe
6% Fe
5-9% Fe |
|
| Iron ligninsulfonate |
5-11% Fe |
|
| Iron polyflavonoid |
6-10% Fe |
|
| Iron Frits |
40% Fe |
|
| Manganese (Mn) |
|
| Basic clag |
1-3% Mn |
|
| Manganese frits |
10-25% Mn |
|
Manganese chloride
MnCl2 |
17% Mn |
|
Manganese carbonate
MnCO3 |
31% Mn |
|
Manganese oxide
MnO |
68-70% Mn |
|
Manganese sulfate*
MnSO4.4H2O |
24% Mn |
|
Manganese chelate*
Mn EDTA |
12% Mn |
|
Manganese ammonium phosphate
Mn(NH4)PO4.H2O |
28% Mn |
|
| Manganese polyflavonoid |
8% Mn |
|
| Molybdenum (Mo) |
|
Ammonium molybdate
(NH4)6Mo7O24.2H2O |
up to 54% Mo |
|
Sodium molybdate*
Na2MoO4.2H2O |
38-46% Mo |
|
| Molybdenum frit |
30% Mo |
|
| Superphosphate |
trace as impurity |
|
| Zinc (Zn) |
|
Zinc chelate*
Na2Zn EDTA |
9-14% Zn |
|
Zinc ammonium phosphate
Zn(NH4)PO4.H2O |
34% Zn |
|
Zinc sulfate*
ZnSO4.H2O |
22-36% Zn |
|
| Zinc sulfide ( sphalerite) |
61% Zn |
|
Zinc oxide
ZnO |
78-80% Zn |
|
| Zinc ligninsulfonate |
5-12% Zn |
|
| Zinc polyflavonoid |
7-10% Zn |
|
| * Commonly used materials |
|
Organic Fertilizer Materials (Approximate Values)
|
| Material |
N |
P2O5 |
K2O |
Ca |
Mg |
S |
Micro-
nutrients |
Acidic (-)
Neutral (0)
Alkaline (+) |
Comments |
|
| Blood (dried) |
12-15 |
3 |
1 |
* |
* |
* |
* |
- |
|
|
| Blood meal |
15 |
1 |
1 |
* |
* |
* |
* |
- |
|
|
| Bone meal (steamed) |
0-2 |
10-20 |
0 |
19-25 |
0 |
0 |
|
+ |
|
|
| Compost (garden) |
Variable depending upon components and amendments |
|
| Cottonseed meal |
6-7 |
2.5 |
1.5 |
* |
* |
* |
* |
- |
|
|
| Cottonseed hull ash |
0 |
|
27 |
* |
* |
|
|
+ |
|
|
Cotton motes
(composted gin wastes) |
2 |
0.5 |
3 |
4 |
0.7 |
0.6 |
* |
- |
May contain weed seed |
|
Fish scrap
(acidulated) |
7-10 |
1-2 |
0 |
* |
* |
2 |
|
- |
Traces of I and Hg |
|
Fish scrap
(dried fish meal) |
9 |
3 |
|
6 |
* |
* |
* |
|
|
|
Hay:
Legume
Grass |
3.0
1.5 |
1.0
0.5 |
2.4
1.9 |
1.2
0.8 |
0.2
0.2 |
0.3
0.2 |
*
* |
-
- |
|
|
Manure: (dried)
Cattle
Horse
Poultry
Broiler litter
Hen-caged layers
Hen-litter
Sheep
Swine |
1.5
0.4
3.0
1.5
1.8
0.6
0.6 |
1.5
0.2
3.0
1.3
2.8
0.3
0.4 |
1.2
0.3
2.0
0.5
1.4
0.2
0.1 |
1.1
*
1.8
6
*
*
* |
0.3
*
0.4
0.4
*
*
* |
*
*
0.3
0.3
*
*
* |
*
*
*
*
*
*
* |
-
-
+
+
+
-
- |
Feedlot manure usually
contains 60-70% water
Average moisture = 20%
Average moisture = 70%
Average moisture = 37% |
|
| Peat/Muck |
2.3 |
0.5 |
0.7 |
|
* |
* |
|
|
|
|
| Sawdust (mixed soft + hard woods) |
0.2 |
0 |
0.2 |
|
|
|
|
- |
High C:N ratio; needs N fert. |
|
| Seaweed (dried) |
0.7 |
0.8 |
5.0 |
* |
* |
* |
* |
+,- |
|
|
Sewage, sludge
(dried, municipal) |
5 |
6 |
0.5 |
3 |
1 |
1 |
|
+ |
Depending on source, may contain heavy metals. Use only on
nonfood-producing areas |
|
| Tankage |
7 |
1.5 |
3-10 |
* |
* |
* |
* |
-,+ |
|
|
| Wood ashes |
0 |
2 |
6 |
20 |
1 |
|
* |
+ |
70% CaCO3 equivalent |
|
| * Present in undetermined amounts. Symbol Key: N = Nitrogen; P2O5 = Phosphorus; K2O = Potassium; Ca = Calcium; Mg = Magnesium; S = Sulfur |
|