Hasanain M. Comparative evaluation of nano and commercial urea on growth, phenology and yield of maize (Zea mays L.) in tarai region of Uttarakhand. IJA [Internet]. 2026 Apr. 13 [cited 2026 Jun. 23];69(2). Available from: https://pub.isa-india.in/index.php/ija/article/view/5443