Cellulose and teabag decomposition rate tests were carried out in 2011, from June 6 to 11 Sep- tember. Pieces of birch cellulose (5 ¥ 10 cm) were dried at 105 °C, stabilized for two hours at room temperature and weighed. A cellulose piece was inserted in a plastic net (mesh size 1 mm) and buried in the peat at each site at the depthsof5and20cm(n=5).Aftertheinsitu incubation period, the ingrown roots and mosses were cleaned off, and the pieces were dried and weighed in the same way as before installation. Cellulose decomposability was calculated from the weight loss. In addition to cellulose, green and rooibos teas were used in the decomposition tests (Keuskamp et al. 2013). Two tea varieties in nylon mesh bags (Lipton® Rooibos Tea and Lipton® Green Tea) were buried at a depth of 7 cm (n = 5) and the decomposition rates were calculated similarly as for the pieces of cellulose.