Abstract
Adding a nitrification inhibitor to fertilizer nitrogen (N) has potential to reduce N loss and increase N use efficiency. On‐farm trials were conducted to determine sunflower seed yield and soil inorganic N responses to spring‐applied urea N rates (100, 75, and 50% of the recommended N rate) and nitrification inhibitor (nitrapyrin) addition in eastern North Dakota. Earn 0.5 CEUs in Nutrient Management by reading this article and taking the quiz at www.certifiedcropadviser.org/education/classroom/classes/731.
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