A mushroom room has no single correct temperature. The number that matters depends on the species, the stage and where you measure it, and the four factors push each other around all day.
- By the end you can explain how temperature, humidity, fresh air and light each act on the crop.
- By the end you can tell bed temperature from air temperature and know which to record.
- By the end you can read stage-by-stage bands for oyster, button and milky from DMR.
- By the end you can recognise the crop's own signals that the environment is wrong.

