DMR's crop chapter gives 85 per cent humidity for pinning and cropping, and the watering section gives an operating band of 80 to 85 per cent. Spawn run and case run are given as 95 per cent in controlled rooms.
The Hindi farmer folder gives 80 to 90 per cent for the same seasonal stage, because a naturally ventilated bamboo or brick room cannot hold 95 per cent. Both are DMR, and each is honest about the room it describes.