Brijesh Kumar, S.K. Prasad, Rekha Rana, Ajay Kumar, Stuti Kumari, Birendra Kumar and Sharandeep Cheema
Abstract
An experiment was conducted during the Kharif season at the Agricultural Research Farm, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi (Uttar Pradesh). The experiment was carried out in Factorial RBD and replicated thrice, the treatments were taken as three crop geometry levels (G1=15 à 15, G2=20 à 11.25, G3=25 Ã9 cm2), and four nitrogen rates (N0=0, N1=75, N2=150, N3=225 kg ha-1). In the experiment, the rice variety Swarna Sub-1 was used. After the harvest, the crop growth parameters were studied and correlation was showed that yield was dependent on plant height, crop growth rate, leaf area index, SPAD value, and dry matter accumulation. Maximum higher grain yield (3932.49 kg ha-1), gross return (84658.69 ha-1), net return (44153.70 ha-1), B:C ratio (1.09) recorded with crop geometry (20 cm à 11.25 cm). The significantly higher grain yield (4274.78 kg ha-1), straw yield (5440.20 kg ha-1), gross return(90157.98 ha-1), net return (49124.24 ha-1), and B:C ratio (1.20) was recorded with nitrogen rate 150 kg ha-1. The interaction effect of crop geometry and nitrogen rates was found to be non-significant.