Research indicates that zinc is more soluble in acidic soils, where it interacts with soil minerals and organic matter to generate complexes that affect the zinc's availability for plant absorption . The solubility of chromium (Cr) in soil is comparatively poor, especially when it comes to its trivalent state, and it gets less the higher the pH. The complex synthesis of soil minerals and organic matter affects the solubility and availability of the material for plant absorption . With pH having a major impact on the dynamics of its solubility, iron (Fe) shows low solubility in soil under aerobic settings but increases in solubility under anaerobic conditions . The solubility of manganese (Mn) is comparatively low in oxidized forms, and pH and redox potential affect its availability for absorption by plants. Research indicates that Mn solubility decreases as pH rises because Mn (II) precipitates at higher pH values .