Crop Storage Humidity Zone Management

A Berlin root cellar divided into zones, damp for roots at the 90 to 95% humidity it asks for and drier for onions. It works from Brandenburg's sandy loams, sets out the DIN 18533 waterproofing classes for buried walls and earth-covered roofs, and names the troubles: ethylene that turns carrots bitter, neck rot in onions kept too moist and white mould in the wet sand. Its thermal passages repeat doc 64 almost word for word, and the cellar temperatures dropped out in extraction.