the short answer is that no, it is not the same. Liquid N would be used for side dressing corn, knifing it in to keep it from volatializing. Also if you need to put on 30 lb.s per acre of N, that would be alot of liquid N. If you are putting on triple 19 fertilizer you would have to put on 200 lb.s of it to get your 30 lb.s per acre, if you putting on 60-0-0 than 100 lb.s would be 60 lb.s of actual N. Liquid fertilizer would have to have to be put on based on the percent of it that is actual N, there would be no difference just because it is liquid, that is why liquid ferts. are mainly for side dressing and used for planting and not as economical as granular for putting on pastures.