Grain Coring

This article explains the purpose and basic procedure of grain coring in storage bins.

What Is Grain Coring

Grain coring is the process of removing grain from the center core of a storage bin to eliminate accumulated fines.

During filling, grain is directed toward the center of the storage. As grain falls onto the pile, it rolls outward toward the bin walls, causing fines to concentrate in the center core.

Coring Procedure

• Remove grain from the center of the bin at regular intervals during filling.

• Withdraw grain daily or more frequently to reduce the peak formed at the center.

• The objective is to shape the grain surface into an inverted cone.

Repeated withdrawals progressively remove fines that collect in the center core, improving grain condition and airflow.

Figure 2. Graphical representation of the coring process.

Additional Notes

• Coring is most effective when performed consistently during the filling process.

• Removing fines helps reduce spoilage risk and supports effective aeration.