Comparing BRP with ERP

A reputable chemist laboratory in Malaysia has analyzed samples of Egyptian Rock Phosphate and Bayovar Rock Phosphate (popularly known as Sechura Rock Phosphate from Peru) for their respective Total P₂O₅ content, Citric and Formic acid solubility, moisture content and particle size.

Table 2 below summarizes the results as follows:-

Table 2: Analytical Comparison of Egyptian Rock Phosphate and Bayovar Rock Phosphate.

Sample	Laboratory Reference	Moisture %	% Total P2O5	% Citric Soluble	% Formic Soluble	% Above 0.5mm	% Below 0.5mm
Egyptian RP	FE12/UH 5	3.7	25.9	7.02	11.4	40.5	59.5
Bayovar RP	FE12/UH 6	2.7	29.4	13.5	22.6	2.1	97.9

 

Viewing the data above, the Bayovar Rock Phosphate has 13.5% higher Total P₂O₅% and 92.3% higher Citric Solubility P₂O₅% than the Egyptian Rock Phosphate.

The particle size of the two phosphate rock fertilizer should also be taken into consideration by users as particle size of phosphate rock can influence the phosphate rock solubility as pointed out by Chien and Friesen (1992).

In conclusion, it is important for users to consider the solubility and the agronomic effectiveness of phosphate rock sources.

Reference:

Chien, S. H., and D. K. Friesen. (1992) “Phosphate Rock for Direct Application,” IN Workshop on Future Directions for Agricultural Phosphorus Research, pp. 47-52, TVA Bull. Y-224. Tennessee Valley Authority, Muscle Shoals, Alabama, U.S.A.