Optimize planting density and nitrogen fertilizer rate on green cob and grain yield of maize ( L.) under irrigation in North Shewa, Ethiopia.

Nowadays producing maize for green cob is a profitable business in addition to producing maize for grain yield. High plant density has been widely used to enhance grain yield in maize. A field experiment was conducted at four locations for two consecutive years (2021-2022) to determine the optimum plant density and nitrogen level and to assess the advantage of selling the green cob rather than the grain yield.