A field study was conducted at ICAR-Research Complex for NEH Region, Basar during 2012-13 to study the effect of planting methods, row arrangement and mulching on toria (Brassica campestris L.) and associated weeds. Results revealed that at 30 and 60 days after sowing (DAS), the weed density and weed dry biomass were lesser in ridge and furrow; among row arrangement lower weeds at 6 rows followed by 3 rows over normal row planting. However, between the mulch, at 30 DAS the lower density and dry biomass were recorded with groundnut haulm mulching at 4 t/ha over no mulch, whereas at 60 DAS, dramatically no mulch plots had lesser weeds as compared to mulched plots. The number of branches/plant, siliqua/plant, seeds/siliqua, seed and stover yields were higher in ridge and furrow at 6 rows arrangement with groundnut haulm mulch at 4 t/ha.