Determining best practices for summer storage of canola in Western Canada

The Challenge

Lack of guidelines available to growers regarding storing canola for extended periods of time. Risk of spoilage is possible when moisture migrates into the bin due to large temperature differentials.

The Project

By testing both large-bins and bench scales, determine specific guidelines related to warming stored canola for growers by answering fundamental questions:

• Temperature profile in a bin of cooled canola throughout the summer months
• Effect of turning and aeration on temperature profile
• Warming rate of canola due to aeration
• Effect of airflow rate on the warming rate of canola

The Results

Overall there was little moisture migration within the bins. This could be a result of low moisture in the canola (6%). The baseline for edge temperature was 25 degrees Celsius, with a core temperature of -3. Turning the seed caused a warm core with warm edges, and cool seed between which eventually evened out. Aerating the seed resulted in a uniform temperature distribution, but the transition to that temperature created unstable conditions which had the potential to condensate. Using the warm summer air for aeration added a large quantity of water to the air voids in the bin but did not transfer to the seed moisture content.

Grower Benefits

If having to store canola for an extended period in bins, ensure the moisture content is low to begin with, followed by little interference. Consistent monitoring of moisture and temperature is required, especially with higher moisture canola seed. A plan in place to move it if problems arise is also recommended.