National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692 Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Field experiment was carried out to assess suitable spacing and weed management practices under rainfed condition that can suppress weeds and enhance the growth of Barnyard millet (Echinochloa frumentaceae) during Rabi season of 2018 at Tamil Nadu Agricultural University, Killikulam, Tamil Nadu. Weed flora observed in experimental field consists of Echionocloacolonum under grasses, Cyperus rotundus under sedges and Amaranthus viridis, Boerhavia diffusa, Cleome viscosa, Commelina bengalensis, Phyllanthus niruri under Broad leaved weeds. Irrespective of weed management practices, total density, total dry weight of weeds and weed control efficiency were higher in weed free check (T11) which was on par with spacing of 25 cm x 10 cm with hand weeding twice on 20 and 40 DAS (T2) fb spacing of 25 cm x 10 cm with Pre emergence application of Pendimethalin @1 kg ai ha-1 + hand weeding on 20 DAS (T4) and spacing of 30 cm x 10 cm with hand weeding twice on 20 and 40 DAS (T5) over unweeded control (T12). Grain and straw yield (1681 and 3975kg/ha, respectively) were significantly higher with weed free check (T11) as compared to Unweeded control (T12). The net return and B: C ratio (Rs. 26502 per ha and 2.17, respectively) were significantly higher with weed free check (T11) which was on par with spacing of 25 cm x 10 cm with hand weeding twice on 20 and 40 DAS (T2) fb spacing of 25 cm x 10 cm with Pre emergence application of Pendimethalin @1 kg ai ha-1 + hand weeding on 20 DAS (T4) and spacing of 30 cm x 10 cm with hand weeding twice on 20 and 40 DAS(T5). Unweeded control (T12) recorded significantly minimum net returns (Rs.6933 per ha) and benefit: cost ratio (Rs.1.34). The result shows that both spacing and weed management practices had the ability of suppressing weeds. Hand weeding twice and narrow spacing had strong and negative effects on weed biomass and positive effects on crop biomass and yield.
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