Translations:Manfred Klett: Von der Agrartechnologie zur Landbaukunst/1039/en

Up to full earthing, the fourth phase takes the longest time. It lasts the longer, the richer the starting material is in raw fibre. In the BKV (cow/horse manure), the stage was reached after approximately four months. The worm activity began in the 7th and ended in the 13th week. The temperature held nearly constant at approximately 25 °C, on average approximately 4 to 5 °C above the fluctuations of the outside temperature.