Seed quality improvement in okra through specific gravity separation
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Society for Promotion of Horticulture
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A study was conducted to assess the efficiency of specific gravity separator in removing partially filled/chaffy seedsof okra during 2007 and 2008. Bulk seed, after extraction, was first subjected to an air screen cleaner with threescreens. Then, the good seed fraction obtained was subjected to specific gravity separation. Three fractions wereobtained, viz., heavy, medium and light and they were assessed for quality, along with ungraded seed. Test weight,germination percentage, first count, seedling vigour indices I & II and field emergence were significantly higher inthe heavy seed fraction than in ungraded seed. Black seed content in heavy seed fraction was significantly low, therebyimproving seed quality. Rejection percentage in terms of light and medium seed fractions put together was 3.5% and12% in 2007 and 2008, respectively. By removal of these fractions, percentage of field emergence improved from63% to 82% in 2007, and 62.8 to 76.4% in 2008, respectively.
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