Author(s): Utkalika Gadtia, PS Rathiya, RS Sidar, Komal Verma, and Supriya Dwivedi

Abstract: A field experiment was conducted at Potato and Temperate Fruit Research Station, Mainpat, Ambikapur, Chhattisgarh during 2023-24 Rabi season to find out the suitable sowing dates and direct effect of different fertility levels on buckwheat. The trial was laid out in split plot design with three dates of sowing viz.2^nd week of September (D₁), 3^rd week of September (D₂) and 4^th week of September (D₃) as main-plot treatment and three fertility levels viz. 60:50:40 kg NPK ha^-1 (F₁), 50:40:30 NPK kg ha^-1 (F2) and 40:30:20 NPK kg ha^-1 (F₃) as sub-plot treatment. Results showed that growth parameters viz. plant population, plant height, number of primary branches plant^-1, number of leaves plant^-1, dry matter accumulation, and all yield attributing characters were the highest under 2^nd week of September (D₁).The highest grain yield (7.25 q ha^-1 ), straw yield ( 11.06 q ha^-1), net return returns (₹25771.89 ha^-1) and B:C ratio (1.47 ) were noted with crop sown on 2^nd week of September(D1).Among the different fertility levels, application of 60:50:40 NPK kg ha^-1 (F₁), was found superior over 50:40:30 NPK kg ha^-1 (F₂), and 40:30:20 NPK kg ha^-1 (F₃), with respect to growth performance and yield attributes which produced significantly highest grain yield (7.0 q ha^{- 1}), straw yield (10.71 q ha^-1), net returns (Rs. 20862 ha^-1) and B:C ratio (1.11).The interactioneffect between sowing dates and fertility levels was found significantly on dry matter accumulation after 60 DAS and flour percentage.

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