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Dielectric barrier discharge (DBD) plasma reac-tors of differing configuration, having a high-voltage electrodein the form of a screw or pyramid, have been investigated as apotential source of soil treatment agents (ozone and nitricoxide). A special geometry of the high-voltage electrodeallows a relatively large ozone concentration to be obtainedboth from air and oxygen, which can be controlled by the gasflow rate, cooling conditions, and value and frequency of thesupply voltage with reasonable generation efficiency. Theseresults are compared with those generated by a commerciallyavailable surface discharge reactor. The resultant properties oftreated soils are characterized, such as acidity (pH), electricalconductivity (EC), and content of moisture (pF), nitrogen(NH4–N, NO3–N), minerals (P2O5,K2O, CaO, MgO, Fe, Mn),and total bacteria and fungi.
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