was made by the degree of air and soil temperature variations during the day: (1) Sand-Ranker, Sand-Rost-erde, (2) Sand-Braunpodsol, (3) Sand-Schwarzgley and related soil series, (4) Sand-Gley, Sand-Anmoor, Moor-Gley, (5) Sand-Gleymoor, Halbmoor, Niedermoor