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Rock Phosphate

Rock Phosphate: A natural mineral source of phosphorus, rock phosphate is commonly used as a source of phosphorus in fertilizer formulations. It is a slow-release fertilizer, meaning that it releases nutrients slowly over time, making it ideal for crops that require phosphorus over an extended period. Rock phosphate is available in several different grades, depending on its composition and the intended use.

Full Description:

Here are some of the common grades of rock phosphate:

1. Low-Grade Rock Phosphate: Low-grade rock phosphate contains between 18-22% phosphorus pentoxide (P2O5) and is typically used for direct application to soil. It is a relatively low-cost source of phosphorus, but its effectiveness depends on soil conditions and the crop's ability to access the phosphorus.

2. Medium-Grade Rock Phosphate: Medium-grade rock phosphate contains between 22-28% phosphorus pentoxide (P2O5) and is typically used for manufacturing phosphoric acid and other phosphate fertilizers.

3. High-Grade Rock Phosphate: High-grade rock phosphate contains between 28-34% phosphorus pentoxide (P2O5) and is the most valuable type of rock phosphate. It is typically used for the production of superphosphate and other high-grade phosphate fertilizers.

4. Reactive Phosphate Rock (RPR): Reactive phosphate rock contains between 20-30% phosphorus pentoxide (P2O5) and is a slow-release fertilizer that can release nutrients over several years. It is often used as a source of phosphorus for organic farming and sustainable agriculture.

5. Phosphate-Rich Organic Manure (PROM): Phosphate-rich organic manure is a type of organic fertilizer made from rock phosphate and other organic materials. It contains between 2-3% phosphorus pentoxide (P2O5) and is typically used for direct application to soil.The choice of rock phosphate grade depends on the intended use, soil conditions, crop requirements, and economic factors such as cost and availability.

No
ELEMENT
RESULTS %
1
P2O5
30.12
2
CaO
48
3
MgO
0.4
4
Fe2O3
1.56
5
Al2O3
0.4
6
Cl
0.06
7
F
3.02
8
SO3
1.51
9
SiO2
6.27
10
Na2O
0.51
11
K2O
0.05
12
L.O.I.
7
13
CO2
5.16
14
CaCO3
10.66
145
O.M.
10.24
16
Moisture
3.0