QUIZ - This Week in Agronomy | Canola Council of Canada

1. Hail rarely causes yield damage when it occurs at this crop stage. (Choose the correct stage.)

Seedling

4- to 6-leaf

Flowering

Podding

2. What caused this pinching?

Cutworms

Moisture

Seedling disease

Wind

3. Weather delays can mean sprayer tanks sit full waiting for a return to favourable spraying weather. This increases the risk of contamination, especially when the tank contains glufosinate or glyphosate. Why?

They are formulated with strong detergents that act as tank cleaners.

These products degrade and no longer work as expected.

Formulations with clay carriers settle out quickly after agitation stops.

Prolonged exposure to air and light increases the potency.

4. A nitrogen top dress can make financial sense for canola if growing conditions improve after seeding, and yield potential now exceeds the soil nitrogen supply. What is another situation where a top dress could make sense?

Saturated soils make it difficult for canola plants to take up nutrients from the soil.

Leaf edges are purpling.

Yellowing, browning and necrosis occurs in the middle of leaves.

Wet soil conditions accelerated nitrogen losses through leaching and denitrification.

QUIZ – This Week in Agronomy

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