CANOLA QUIZ – Nitrogen top-up

1. On the 4R topic of Right Source, the Canola Encyclopedia says that if using a liquid fertilizer, apply _____________ to reduce absorption of liquid into the plant, which will increase the amount of leaf burn.

2. On the topic of Right Time, the Canola Encyclopedia says: "Ideally, a nitrogen top dress should occur _______________." (Fill in the blank.)

3. For Right Rate, the Canola Encyclopedia says, "Growers may need to top dress up to ____ pounds per acre of actual nitrogen to visually notice an improvement, but yield differences for rates lower than that may show up at harvest." (Fill in the blank.)

4. For Right Place, the Canola Encyclopedia says broadcast spreading of urea or surface dribble banding of UAN are the most common and fastest methods, but these methods can also result in the highest losses if rain doesn’t follow soon after the application. The Encyclopedia notes that one of these options (urea or UAN) tends to be better than than the other for losses. Which one tends to have lower losses when broadcast?

5. A detailed Canola Watch article on top dress tips lists a few factors that can increase nitrogen losses when nitrogen fertilizer is applied in-crop. Moisture is a major factor. Which moisture factor below would likely cause the highest amount of loss for a surface application?