Singh, V.K.Prabhaker, Ajay Kumar2017-07-082017-07-082016-08http://krishikosh.egranth.ac.in/handle/1/5810024699A field experiment entitled “Influence of planting pattern and weed management on the performance of component crops in maize + urdbean intercropping system” was conducted during kharif seasons of 2013 and 2014 at D-6 block (pulse agronomy) of Norman E. Borlaug Crop Research Centre of G.B. Pant University of Agriculture and Technology, Pantnagar. Treatments consisted of four planting patterns [urdbean sole (30 cm), maize sole (60 cm), normal planting of maize + urdbean (1:1) and paired planting of maize (30/90 cm) + urdbean (2:2)] and five weed management practices {weedy check, weed free, pendimethalin 0.75 kg ha-1 (PE) and 1 hand weeding (25 DAS), imazethapyr 75 g ha-1 (POE, 20 DAS) alone and pendimethalin 0.75 kg ha-1 (PE) + imazethapyr 75 g ha-1 (POE, 20 DAS)}. The experiment was laid out in split plot design (SPD) keeping planting pattern as main plot and weed management as sub plot with three replications. The varieties of urdbean and maize sown were Pant U-31 and Surya, respectively. Urdbean sole and normal planting of maize + urdbean (1:1) had lower total weed density and dry weight than sole planting of maize and paired planting of maize (30/90 cm) + urdbean (2:2) . Weed control efficiency was numerically higher in Paired planting of maize (30/90 cm) + urdbean (2:2) compared to sole planting of maize and urdbean. Most of the growth parameters viz; number of branches per plant, dry matter accumulation (g/plant), crop growth rate and relative growth rate of urdbean sole were comparatively higher than intercropping systems. Sole planting of maize had higher values of their growth parameters than their intercropping systems. Sole planting of maize and urdbean recorded significantly higher grain yield than inter cropping system. Both the intercropping systems had significantly higher urdbean equivalent yield and land equivalent ratio than sole planting of urdbean and maize. The lowest total weed density and weed dry weight were recorded in weed free fallowed by pendimethalin 0.75 kg ha-1 (PE) and 1 hand weeding (25 DAS) , pre emergence application of pendimethalin 0.75 kg ha-1+ post emergence application of imazethapyr 75 g ha-1 (20 DAS), post emergence application of imazethapyr 75 g ha-1 (20 DAS) alone. Pendimethalin 0.75 kg ha-1 (PE) and 1 hand weeding (25 DAS) computed significantly higher weed control efficiency than pendimethalin 0.75 kg ha-1 (PE) + post emergence application of imazethapyr 75 g ha-1 (20 DAS), post emergence application of imazethapyr 75 g ha-1 (20 DAS)alone and weedy check. Urdbean equivalent yield was significantly higher in weed free and herbicide treated plots than weedy check. The highest gross return (71976 Rs. ha-1), net return (46621 Rs. ha-1) B : C ratio (1.83) was computed under normal planting of maize + urdbean (1:1). Weed free recorded maximum value of gross return (75057 Rs. ha-1), net return (51799 Rs. ha-1) and B : C ratio (2.22).ennullThesis