Coring your stored grain improves aeration in your bin

A recommended grain management practice after you filled up your bin during harvest is coring your grain. This involves removing up to a few loads of grain from your bin after fill up.

By removing the “core of your grain bin” – you can move up to 90% of the fines. Grain fines are chaff and little broken pieces of grain that accumulate in the center of your bin during loading. The high density of fines in the center core, restricts airflow within the bin and reduces your ability to dry down and cool down your grain after harvest.

Since most of your grain filling activities occur during harvest, your ability to dry and cool freshly harvested grain within your bin is extremely important. This is because at harvest you often have no other options than to store damp or moist grain that has been warmed up by the heat of summer. To ensure your grain does not rot or become infested by insects, you will need to aerate your stored grain to prepare for long term storage.


When should I core my grain?

In a typical Western Canadian scenario, we recommend coring your grain bins immediately after harvest. One way of testing to know if you already have hot spots in your bin where condensation is occurring is by checking the top of the bin to look for crusted or molded grain. If this is the case, we recommend you take action immediately by coring your bin. Another way to stay on top of hot spots within your stored grain bins is to install temperature and moisture cables. By doing so the temperature of your stored grain is readily available, giving you the opportunity to take the required action if needed. If set-up accordingly, your grain storage temperatures can be read in real time off your mobile phone.



How much grain do I need to remove when coring?

For large flat bottom bins take out enough grain until the peak at the top of the bin is replaced by slight depression where the grain level is just below the stored grain at the wall. That way you can feel confident that you removed enough grain to make a difference. Quantity of grain removed will vary by bin size (diameter).

Design & Manage Your Ability to Aerate your Stored Grain

  • Build flat bottom bins with aeration floors
  • Install a blower/heater to force air upwards through the bottom of the floor
  • Core your grain bin after harvest and again to remove hot spots
  • Install temperature cables to effectively monitor the temperature of your stored grain

For more discussion on how to increase the aeration within your stored grain bin please contact by clicking on this link.


"When speaking to your sales rep, we learned a lot about the advantages of stiffened walls as well as how temperature monitoring and fan control can keep you from losing value on your grain."

Don Chapman (farmer)