With changing scenario of modern agriculture with better technology, production systems accompanied by free market through globalizing, castor has now emerged out as one of the most commercial non-edible oil seed in the country. In Gujarat, during last few years the area under castor crop is increasing in south Gujarat. The existing cropping pattern of paddy-sugarcane of south Gujarat is need to be changed as both crop requires higher water requirement. Thus, the scientific information regarding level and source of nitrogen for high yielding hy. GCH-7 is lacking. A few scientific information...