Canola Watch Exam 2020 – Section 4 – Harvest loss and storage

This is the fourth of seven sections for this year’s Canola Watch annual CCA/CCSC exam. By dividing the exam into seven separate sections, we are giving CCAs and CCSCs the opportunity to customize the exam based on credits they need and to take some in 2020 and some in 2021.

Those who achieve 70 per cent or better on this section will qualify for 1 CEU (CCA and CCSC) in Crop Management.

Credits will be applied in either 2020 or 2021, depending on when you pass this section. For those who pass, Canola Watch will submit your name and number to the program to have the credits counted.

When writing this self-study exam, note that all answers can be found in Canola Watch articles as well as Canola Watch videos, podcasts and Canola Encyclopedia and Canola Digest links from 2020. You can find the Issue Archives as well as the video and podcast libraries under the “Canola Watch” tab at the top of

For questions or additional information on this exam, please contact Jay Whetter at 807-468-4006 or

No matter the care taken to seed a good crop and protect it throughout the growing season, all profitability can go out the window with high harvest losses and high-risk storage. CCAs and CCSCs will benefit from having this end-of-season knowledge to help their farmer clients harvest more of their crop and protect it while in storage.

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Your CCA number: (Leave blank if not applicable)

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REQUIRED - What region best describes your work territory?
1. A January article links to a report on PAMI’s fall 2019 canola harvest loss survey. The report demonstrates the importance of adjusting combine settings based on changes in temperature, humidity and cloud cover. A summary table shows average losses of 0.8 bu./ac. when temperatures are 23°C or more. What is the average loss if temperature is below 23°C?
2. A January article on stored canola includes a reminder that grain moisture testers are not designed to work on cold grain. What does NDSU storage researcher Kenneth Hellevang recommend for testing cold grain?
3. A March article on spring drying tips makes an important point about air’s capacity to dry. To emphasize this point, the article says that air at 18°C will dry ____ times faster than air at 10°C. Fill in the blank.
4. In-bin grain drying also requires good airflow, and airflow depends on fan capacity and the amount of grain in the bin. The same March article described in question 3 says airflow needs to be at least ___ cubic feet per minute per bushel (cfm/bu.) for moisture removal. Fill in the blank.
5. Canola Watch posted a two-part storage podcast in April. (Find all podcasts here.) In part one, CCC agronomy specialist Angela Brackenreed describes a guideline on bin ventilation, which is essential to remove the condensation that results from heated-air drying. What is the minimum amount of venting recommended?
6. An August article described pre-harvest “aids” – herbicide or desiccant – to prepare canola for straight combining. One option is glyphosate, which must be applied when canola seeds are less than 30 per cent moisture. Because seed moisture is difficult to determine, what does the article provide as helpful guide?
7. That same article also has an important tip on timing for the desiccant diquat. If using that product, when should it be applied to canola?
8. In Episode 23 of the Canola Watch agronomy video series, Angela Brackenreed describes the Combine Optimization Tool at (Find the full video series here.) In the video, what does Angela say is a realistic and achievable goal for combine losses?
9. Frost at harvest is a common event, and green seed is the major downgrade that results from frost. A September 2 article provides tips on what to do after a frost. The key message is:
10. The Canola Watch quiz for September 23 includes a question about spoilage in the bin. Canola coming off warm and tough can start to spoil fairly quickly. Clumping is a sign of mould growth that leads to heating. Lab-based research found that canola seeds at 25°C and 10.6 per cent moisture clumped together after _______ days in storage. Fill in the blank.