In crop storage, relative humidity and temperature are crucial factors to guarantee the quality and therefore maintain the value of the crop.

Stored crop can lose weight by giving up water to the surrounding environment through the process of respiration, which lead to its quality deterioration. The ideal condition is to provide humidity levels that prevent the migration of moisture to or from the stored crop to the atmosphere.

The relative humidity of the air is very important in crop storage: for instance, potatoes should be stored between 95%rh to 98%rh to keep shrinkage losses low, as the losses are two times higher at 90%rh than at 95%rh.