Abstract
Effect of seed orientation and depth of sowing on germination, seedling emergence and seedling vigour of Jatropha curcas was investigated. The preconditioned seeds were sown in sand filled earthen pots at 1.5, 3.0 and 5.0 cm depth, adopting three orientations of the embryos viz., up right (embryo facing up), horizontal and inverted positions. The experiment was laid out in a completely randomized block design. Percentage germination, root and shoot length and dry matter production were measured and the vigour index was calculated. Placing the seeds with the embryos in a upright or horizontal position at a depth of 1.5 cm and 3.0 cm resulted in early and higher germination and computed vigour index.
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