The Solubility of Micronutrients in Ammonium Polyphosphate Solutions

Abstract

Experiments were carried out to determine the solubilities of micronutrients [Fe(III), B, Zn, Cu, Mn, Co, Mo] in 10–34–0 ammonium polyphosphate solution. As a result a method was elaborated which, in the case of polyphosphate solution containing three of the above mentioned micronutrients, enables the calculation of concentration relationship without the knowledge of the composition and stability coefficients of the formed complex compounds. This method can be extended to the description of fertilizer solutions containing more than three micronutrients.