June 15 Quiz — Nutrient top dress Jay Whetter June 15, 2016 Leave a Comment Three questions to test the basics on top-dressing fertilizer. 1. Nitrogen fertilizer should be in place before the crop needs it. At what canola crop stage does N uptake really start to ramp up?Cotyledon to 2-leaf2- to 4-leaf5-leaf to elongationflowering to podding 2. What nitrogen fertilizer source is NOT recommended for top dressing?Ammonium sulphateESNUANUrea 3. A top dress of 10-20 lb./ac. (actual) of sulphur can fix a sulphur deficiency in canola. Three of the following are symptoms of sulphur deficiency. One is not. Which one doesn't belong?Stunting of new leavesCupping of new leavesPale and small flowersOlder leaves go pale green or yellow prematurely Loading...
