Nitrogen Rates for Ohio Winter Canola Production.

Winter canola requires adequate N for optimal yield. It is a new crop for Ohio and the proper N rate is unknown. Plots were established near Custar and/or Fremont, OH from 2003 – 2004, 2006 – 2010 and 2012.  All plots received 20 – 30 lb acre^-1 of fall N. A spring N rate curve of eight rates was established at 20 lb acre^-1 increments (0 to140 lb acre^-1) except for 2003.  In 2003, a curve with 5 rates was established from 0 to 120 lb acre^-1 at increments of 20 lb acre^-1. Experimental design was a completely randomized block replicated four times. Optimum spring N rates varied between 85 and 106 lb acre^-1 with an overall optimum N rate of 98 lb acre^-1.