Why is it raining on wheat and the warehouse can't be ventilated?

Because after the wheat is harvested and dried, it can be put into the warehouse for safekeeping. If it rains, open the warehouse for ventilation, so that wheat is more susceptible to moisture and is not conducive to long-term storage.

When the humidity exceeds 70%, it is impossible to ventilate and cool the granary. The moisture content of wheat stored for a long time is below 12.5%, which can prevent the growth of most microorganisms and waxes.