How do ventilation and grain drying reduce losses during cereal storage?

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A large red and yellow combine harvester cuts through a golden wheat field, leaving neat rows of harvested grain behind. — Cereal farming Combine harvesting wheat.

Proper management of moisture content and temperature is essential to prevent spoilage during cereal storage. Grain naturally undergoes respiration, a process that generates heat. If the moisture content exceeds 16 percent, this heat cannot dissipate effectively, causing temperatures to rise and further accelerating the rate of respiration, which leads to grain damage.1

Ventilation and drying techniques mitigate these losses by:

Lowering Temperature: Turning over cereal stocks facilitates ventilation, which helps keep the grain cool and prevents the buildup of heat caused by respiration.1
Reducing Moisture: Maintaining a low moisture content (ideally 10–12 percent) prevents the temperature spikes associated with respiration, thereby stabilizing the grain.1

By controlling these environmental factors, farmers and storage facilities can prevent the grain from becoming a favorable environment for molds and various insects, ultimately preserving the weight, milling value, and food value of the crop.1