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Abstract

A field experiment entitled “Effect of Brown Manuring and Herbicide Application on Yield Attributes and Soil Nutrients Status of Aerobic Rice Under Varying Planting Geometry” was conducted at Main Rice Research Centre, Navsari Agricultural University, Navsari during kharif 2021. The experiment was carried out in randomized block design with factorial concept and replicated three times. The experiment comprised with treatments of spacing levels i.e., S1 – 30 cm and S2 – 40 cm and weed management treatments viz., W1 – Brown manuring at 30 days, W2 – Pendimethalin 750 g a.i./ha (PE) + Brown manuring, W3 – Pyrazosulfuron ethyl 25 g a.i./ha (PE) + Brown manuring, W4 – Pendimethalin 750 g a.i./ha (PE) + Bispyribac sodium 40 g a.i./ ha at 30 DAS, W5 – Hand weeding twice at 20 and 40 DAS and W6 – Weed check. The results obtained from the experiment revealed that the length of panicle and test weight of aerobic rice did not have any significant influence due to varying row spacing. While number of effective tillers/hill, number of grains/panicle, grain yield and straw yield of aerobic rice were recorded significantly higher with 30 cm line sowing as compared to wider spacing. However, both row spacing treatments failed to produce any remarkable changes in NPK content and OC percentage of post-harvest status of soil. With respect to the weed management practices, significantly higher value of yield attributes parameters and yield of aerobic rice were observed under hand weeding twice at 20 DAS and 40 DAS. Pendimethalin 750 g a.i./ha (PE) + Bispyribac sodium 40 g a.i./ha at 30 DAS was also found be equally effective. Significantly higher values of available NPK content and OC percentage were with Pendimethalin 750 g a.i./ha (PE) + Brown manuring.