“…Similarly, soil organic matter content is often measured but also seldom considered in oxidant dose selection. Moreover, even if TOC is the most common indicator (Figure 3), it may have been quantified by a number of methods [244]: dry combustion at 440 °C [94], 680 °C [47] or 900 °C [41,49,50,56,57,163,203,240,241], wet oxidation with dichromate [205,[234][235][236][237] or a mix of both methods [54]. The measurement method may be not specified [30,150,194,206,213,216,221,222,232,233].…”