In a field study at the Tamil Nadu Agricultural University the influence of Gpacing (15 and 30 cm), row distance (20. 30 and 40 cm) and nitrogen levels (0, 20, 40 and 60 Kg/ha) on the laaf leal area, weight and the yield of Seramum indicum L was investigated. Marked reduction in the number of leaves, leaf arse, weight of leaves was noticed in the rainfed rather than in summer crop, In Sesamum variations in leat area are outstanding phanomena caused primarily by apecing and also row to a certain extent. An interaction of spacing and nitrogen effects involved whose efficiency in Improving the source is cenaldarebly restricted by shading. Shading caused leaf ares and concomitant reduction in yield due to light interception.
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