Pantnagar Journal of Research

Abstract

The experiment was conducted during kharif 2019 at G.B. Pant University of Agriculture and Technology, Pantnagar, Uttarakhand, India to study the influence of sensor-based N management on performance of maize. Total eight treatments viz., 100% N (120 kg/ha), 33 % basal N + GreenSeeker based N at knee-height & tasseling stage, 60 % basal N + GreenSeeker based N at knee-height, 70 % basal N + GreenSeeker based N at knee-height, 60 % basal N + GreenSeeker based N at tasseling stage, 70 % basal N + GreenSeeker based N at tasseling stage, 30 % basal N + 30 % N at 25 days after sowing (DAS) + GreenSeeker based N at tasseling stage and 35 % basal N + 35 % N at 25 DAS + GreenSeeker based N at tasseling stage were tested in RBD. Significantly higher plant height, dry matter per plant, grain yield and net return as well as N saving were obtained in 30-35% basal nitrogen + GreenSeeker based N application. Grain yield under 100% RDN was at par with GreenSeeker based N treatments which had 30-35% basal N. Results indicated that GreenSeeker based nitrogen application in maize is not only productive but also saves nitrogen. Higher net return with less requirement of nitrogen can be obtained 30-35 % basal N + 30-35 % N at 25 DAS with GreenSeeker based N application at tasseling stage.