S. Aruna, S. Kandasamy, R. Raman, M. Meyyappan and K. Dhanasekaran
Abstract
The aim of this research experiment was to identify the most suitable combination of sesame varieties and planting geometries that improves growth, resource-use efficiency, and seed yield under the existing agroclimatic conditions. This research investigation entitled âOptimizing Planting Geometry and Varietal Performance for Enhanced Yield in Sesame (Sesamum indicum L.)â was conducted scientifically under a split plot design viz., variety and spacing each at four levels (V1 -TMV7, V2 -VRI3, V3 -VRI4, V4 - SVPR1 and S1 - 30 cm x 10 cm, S2 - 30 cm x 30 cm, S3 -45cm x 10 cm, S4 -45 cm x 15 cm) respectively. Significant differences were observed among the varieties for key growth and yield attributes, with the superior genotype VRI 3 constantly recorded greater plant height, biomass accumulation and seed yield. Planting geometry also had a marked influence on crop performance, as the wider spacing of 45 cm à 15 cm enhanced vegetative growth and through balanced plant growth, resulted in increased seed and stover yields and also the interaction effects further confirmed that the highest seed yield occurred when the top performing variety was cultivated under the most suitable spacing, demonstrating a strong varietal response to planting geometry. Thus, the study concluded that the combination of VRI 3 grown at 45 cm à 15 cm proved superior, as the wider spacing minimized intra plant competition and allowed the varietyâs inherent vigour to express fully, resulting in the highest yield and yield parameters.