Mechanical weeders, Maize
Effect of different manually operated weeders on weeds and grain yield of maize was studied. Among the manually operated weeders evaluated, wheel hoe registered an yield increase of 154% over control, took lowest weeding time (71.43 hr/ha), covered maximum area with minimum cost of operation (Rs. 714/ha) on weeding twice on 25 and 45 DAS which was on par with pre-emergence application of atrazine 0.5 kg/ha on 3 DAS followed by hand weeding on 45 DAS.