Özçelik and Pekşen (2007), analyzing the application of hazelnut shells in the formulation of substrate for mushroom cultivation Lentinula edodes, reported that the biological efficiency of the substrate made with hazelnut shells only,
was considered to be low (43.73%). However, when the proportion of hazelnut shells was reduced and combined with wheat straw (25:75) the biological efficiency was considered good (62.24%). The result however, is less than that
reported in this study (Table 3). Philippoussis et al. (2007) tested the productivity of agricultural residues (sawdust of oak,
wheat straw and corncobs) in the cultivation of Lentinula
edodesand found that corncobs and wheat straw presented higher rates of biological efficiency: 80.64% and 75.23% respectively, which were similar to those presented in this research. Alberto and Lechner (2007) however, obtained lower BE (61.93%), cultivating Lentinus tigrinuswith Salix sawdust.