Effect of phosphorus and nano urea on growth and yield attributes of maize (Zea mays (L.)

Abstract

The field experiment was conducted during kharif season of 2023 at Crop Research Farm, Department of Agronomy. The experiment was laid out in a Randomized Block Design with ten treatments which have replicated thrice. The treatment details are as follows T1: Phosphorus 40 kg/ha + Nano Urea 1 ml/l, T2: Phosphorus 40 kg/ha + Nano Urea 3 ml/l, T3: Phosphorus 40 kg/ha + Nano Urea 4 ml/l, T4: Phosphorus 60 kg/ha + Nano Urea 1 ml/l, T5: Phosphorus 60 kg/ha + Nano Urea 3 ml/l, T6: Phosphorus 60 kg/ha + Nano Urea 4 ml/l, T7: Phosphorus 80 kg/ha + Nano Urea 1 ml/l, T8: Phosphorus 80 kg/ha + Nano Urea 3 ml/l, T9: Phosphorus 80 kg/ha + Nano Urea 4 ml/l, and Control Plot. The results of the experiment revealed that the Application of Phosphorus at 60 kg/ha along with Nano Urea 4 ml/l (Treatment 8) recorded significantly higher plant height (205.04 cm), maximum plant dry weight (310.00 g/plant), maximum crop growth rate (39.13 g/m2/day) maximum rows per cob (12.93), grains per row (22.67), seed index (22.70 g), grain yield (5.54 t/ha), Stover yield (8.29 t/ha), harvest index (35.86%). The same treatment also recorded maximum gross return (INR. 110016.60 /ha), net return (INR. 66936.60 /ha) and benefit cost ratio (1.55).