Weed dynamics, wheat (Triticum aestivum) yield and irrigation water-use efficiency under conservation agriculture

A field experiment was conducted to evaluate the impacts of a 12-year old conservation agriculture (CA)- based pigeon pea-wheat system on weeds, wheat crop, and resource use during winter (rabi) 2021–22. Results indicated that surface retention residue irrespective ZT permanent bed N dose led significant reduction in weed interference at 60 DAS. CA-based systems reduced density dry weight considerably than CT. CA- significantly higher grain yield (by 11.6–14.9%) net B:C 24.0 –28.0%) CT, PFBR100N PBBR100N were slightly superior others. PBBR75N had lower irrigation water productivity Contrast analysis showed comparable between 75% 100% CA, indicating saving 25% under CA.