Chemical Weed Control and Precision Nitrogen Management in Late Sown Wheat (Triticum Aestivum L.) Under Western Plains Zone (Wpz) of Uttar Pradesh

Abstract

The present study was carried out at the Crop Research Centre of Sardar Vallabhbhai Patel University Of Ag. & Tech, Meerut, (U.P.) during rabi season of 2019-20 and 2020-21. The experiment was conducted under split plot design with four replications, treatments comprising of four Precision Nitrogen management levels (1- Control, 2- State Recommendations,3 - L.C.C based Nitrogen Application and 4 - SPAD based treatments, in main plots, Four different combinations of herbicides for different types of weed present in wheat field i.e. (1- Control, 2- Pinoxaden @ 40g a.i. ha-1 + Metsulfuron Methyl 5% (20g a.i.ha-1 ), 3- Fenoxaprop-p-ethyl 10 WP (100 g a.i. ha-1) and 4 - Clodinafop 15 WP (100 g a.i. ha-1) in sub-plots. Results of present study revealed that L.C.C based Nitrogen Application was found to be easier, economical and also showed its superiority in grain yield (45.62 & 45.81 q ha-1), straw yield (72.96 & 74.02 q ha-1). Similarly in sub-plot a combination of broad leafed and narrow leafed herbicide Pinoxaden @ 40g a.i. ha-1 + Metsulfuron Methyl 5% (20g a.i.ha-1 ) was found to be more effective and economical in view of spraying, gives maximum grain yield of (46.42 & 46.72 q/ha), straw yield (73.12 &74.43 q ha-1) during both the years, including gross return (Rs.129204 ha-1.), Net return (Rs.90519 ha-1) and B:C ratio (1:2.34). Study revealed that use of L.C.C scale with combination of herbicides proved to be best and most efficient way to maximize wheat production.