Manual Grain Inspection

This article explains the basic steps for performing a manual grain inspection.

1. Grain Sampling for Analysis

The silo manager should collect grain samples from areas suspected of quality or insect issues.

• Use appropriate sampling equipment, such as:

  • Deep bin probes

  • Double-tube sampling spears

• Target locations where temperature, moisture, or other indicators suggest potential problems.

2. Grain Turning

Grain turning, also called recirculation, is the movement of grain from one bin to another, preferably into an empty bin.

• This may be used as an emergency measure, for example when the temperature monitoring system indicates a rapid temperature increase (approximately 2 °C).

• The purpose of grain turning is to:

  • Identify the cause of temperature increases

  • Visually assess grain condition

  • Collect samples for quality evaluation

During grain turning, the grain may be:

• Inspected

• Sampled

• Cleaned

• Cooled

• Blended

• Fumigated while transferring to the receiving bin

Grain turning should be performed carefully to minimize costs related to grain breakage and other indirect losses.

3. Checking for Odors

To check for musty or spoiled grain odors:

1. Run the aeration fans briefly.

2. Smell the first air exiting the grain mass.

If musty odors are detected, then aerate the grain.