Crop geometry, Halosulfuron, Soil enzymes, Tembotrione, Topramezone

A field experiment was conducted at the Agricultural Research Farm, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi during rainy season of 2022 to study the effect of crop geometry and herbicide treatment on weeds, soil enzymes and yield of maize. The experiment was conducted in a Randomized Complete Block Design with two factors, crop geometry and weed management. Narrower crop geometry (60 x 15 cm) recorded lower weed density and dry weight as compared to wider crop geometry (60 x 20 cm). However, in case of herbicidal treatment, atrazine 1.0 kg/ha fb topramezone 25.2 g/ha at 25 DAS had lower weed density and dry weight in comparison to atrazine 1.0 kg/ha fb halosulfuron 67.5 g/ha at 25 DAS except Cyperus esculentus. Grain and stover yields were significantly higher (0.52 and 0.77 t/ha) in narrower crop geometry (60 x 15 cm) as compared to wider crop geometry (60 x 20 cm) 0.43 and 0.66 t/ha, respectively. Significantly higher grain yield (0.51 t/ha) was observed in atrazine 1.0 kg/ha fb topramezone 25.2 g/ha at 25 DAS as compared to atrazine 1.0 kg/ha fb halosulfuron 67.5 g/ha at 25 DAS (0.47 t/ha).