The application of some of the agents such as the organic substance or silicon compounds may, under certain conditions, control the level of ions of toxic matter in the soil solution. The aim of this work was to explore the influence of the artificial humic acids and sodium silicate present in the soil on the modification of the content of various fractions of aluminium and manganese in the soil samples collected after harvesting two varieties of wheat (HeliaandIsmena) within two phases: earing and full maturity. The scheme of the experiment research included 11 scenarios (A), two varieties of spring wheat (B), as well as two of the plants development stages (C) within two repetitions. Scenarios (A) of the experiment were designed through the insertion into the selected pots of the soluble aluminium and manganese salts, as well as the immobilising agents. The concurrent addition of the organic substance (humic acid sodium salt) and the mineral substance (sodium metasilicate) reduced to the highest degree the level of the mobile forms of aluminium and manganese in the soil environment. Moreover, it influenced the creation of the largest number of ‘weak’ and ‘strong’ bondings between Al and the organic substance, as well as ‘weak’ bondings between Mn and the organic substance.
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