“…The rate of organic matter decomposition is measured using various test objects, such as filter paper [1] , [2] , [3] , [4] , linen [ 5 , 6 ] or cotton [7] , [8] , [9] fabric, tea bags [9] , [10] , [11] , [12] , [13] , [14] , [15] , [16] , components of woody or herbaceous plants (needles, leaves and branches) [ 11 , [17] , [18] , [19] ]. Recently, the tea bags have become the most widely used among them with the subsequent calculation of a Tea Bag Index (TBI) [ 10 , [20] , [21] , [22] ] proposed by [23] . The use of standardized material makes it possible to evaluate the contribution of external factors, regardless of the properties of decomposed test objects.…”