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 Sul-Po-Mag
Standard supplies
three vital plant nutrients — potassium, magnesium and
sulfur (22% K20, 11% Mg and 22% S).
It is an excellent source of non-chloride potassium,
water soluble magnesium and non-acidifying sulphur. Sul-Po-Mag
Standard
is an economical source of these nutrients particularly
in direct soil application situations such as perennial
plantation crops (banana, citrus, coffee, palm oil, rubber,
tea, etc.). Its maximum chloride content is less than
3.0 percent, minimizing the potential for fertilizer "burn." It
is widely used on sensitive vegetables and fruit crops
that require high fertilization rates, but do not tolerate
high levels of chloride or soluble salts. Sul-Po-Mag Standard
has a typical SGN of 95 and is often used as a source of
potassium, magnesium and sulfur in granulated formulas
(NPK+Mg+S). AGRONOMIC
CHARACTERISTICS
Potassium is required for the uptake of nitrogen and synthesis of protein and
starch. It also helps activate more than sixty enzymes, making them available
to stimulate other chemical processes within the plant. Adequate potassium
is essential for fruit formation, optimum yields and high quality. Magnesium
activates a large number of enzymes in the plant and is also required for the
synthesis of chlorophyll - the vital green pigment necessary for sugar manufacturing
in plants. Sulfur activates a number of enzymes, is vital to the formation
of amino acids, is crucial in the production of protein and is especially important
to plants with high oil content. Sul-Po-Mag
Standard Specifications: 0-0-22
CHEMICAL ANALYSIS
| Component |
Symbol |
Typical
Range (%) |
Typical
(%) |
Guarantee
(%) |
| Potassium
Oxide |
K2O |
22.0-22.4 |
22.1 |
22.0
min. |
| Potassium |
K |
|
18.3 |
|
| Calcium |
Ca |
|
0.1 |
|
| Sodium |
Na |
|
0.7 |
|
| Magnesium |
Mg |
11.2-11.6 |
11.3 |
10.8
min. |
| Sulfur |
S |
22.3-22.7 |
22.5 |
22.0
min. |
| Chloride |
Cl |
0.8-1.6 |
1.2 |
2.5
max. |
| Water
Insoluble |
— |
|
0.3 |
|
| Moisture
(105°C) |
H2O |
0.04-0.15 |
0.05 |
|
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TYPICAL
PROPERTIES
| Physical
Properties |
Typical |
| Bulk
Density, loose lb/cu foot |
91 |
| kg/cu
meter |
1458 |
| Angle
of repose (degrees) |
34 |
|
SCREEN
ANALYSIS (SGN=90: UI=16)
| Tyler
Mesh |
U.S.
Mesh |
Opening
(mm.) |
Typical
Range
(% cum.) |
Typical
(% cum.) |
| 10 |
12 |
1.680 |
0-6 |
3 |
| 14 |
16 |
1.190 |
20-35 |
30 |
| 20 |
20 |
0.841 |
45-80 |
55 |
| 28 |
30 |
0.600 |
70-80 |
75 |
| 35 |
40 |
0.420 |
80-90 |
85 |
| 48 |
50 |
0.300 |
90-95 |
92 |
| 65 |
70 |
0.210 |
93.100 |
95 |
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Product
analyses are typical as tested at mine site. Handling and transportation
may affect the analysis of the delivered product. 
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