Influence of terminal clipping and nano-urea on seed yield and quality of rapeseed (Brassica rapa var. yellow sarson)

Abstract

 An experiment was conducted on rapeseed (Brassica rapa var. yellow sarson) to study the effect of terminal clipping and 
nano-urea on seed yield and seed quality parameters. The field experiment was laid out during the Rabi seasons of 2021
22 and 2022-23 in split plot design with three replications, considering clipping of terminal bud as first factor and five 
treatments of nano-urea, including control, as second factor. The analysis of data revealed significant influences of 
clipping on morphological traits, while non-significant effects were observed on physiological traits. Among the 
 treatments, T₂ (50% N, full P₂ O₅ , K₂O at basal + foliar spray of 4 ml L^-1 nano urea at 30 and 45 days after sowing) and T 
 (50% N, full P₂ O₅ , K₂ O at basal + foliar spray of 4 ml L^-1 nano-urea + 0.1 % Boron at 30 and 45 DAS) exhibited significant 
impacts on both the morphological and physiological traits. Overall, the application of nano-urea at a concentration of 4 
 ml L^-1 , supplemented with 0.1% Boron, twice at 30 and 45 DAS, along with terminal clipping, emerged as the most 
effective treatment. This approach not only minimizes excess fertilizer application but also contributes to the reduction 
of environmental hazards.