If the electrolysis with iron gaphene is emplyed overall negative chared materials will migrate to the iron electrode and to the graphene electrode the graphene with pull out the anionically charged compents.

This according to your analysis is making the soils which are not naturally acid more alkaline in thei nature.

Organic material and clay are having averall negative surface charge drives thei into solution iwth water. The precence of cationic briding materials with aggregate and precipate them taking them out of solution.

Mobililizing the materials through current can unbridge the materials and in the adlaize soils the effect would be increase the alkalinity.

Thank You! Your answer is very illuminating! But I wonder why the Ph paper is showing me normal values? Otherwise for homogene aquatic solutions the Ph paper is relative accurate. Under the USB microscope also the electrodes after electrolysis were observed (S. enhanced snapshots). Soils (JPG and TLV) with lower Ph after electrolysis had rarely or no yellow-brown deposits on iron electrodes, while carbon electrodes contained more white crystalline deposits. Are the yellow-brown deposits on the iron electrodes from ferric oxide (II, III) and sulphide or even elemental sulphur, while the white deposits on the carbon electrodes are from sulphates, nitrates and chlorides? I will carry out a further analysis of the chemical composition of these soils to come closer to this answer.