Effectiveness of Seed Processing Machinery on Seed Quality Improvement in Paddy (Oryza sativa L.)
Abstract
A series of seed-processing machines were used to evaluate seed quality improvement in
paddy during the Kharif season 2013-14. The processing machines proved an efficient tool in
producing quality seeds. The consistent and higher seed quality (germination 91.67% and
physical purity 99.83%) could be achieved by efficient use of processing machines. The
product and separate (reject) from individual machines were analysed to evaluate machine
efficiency in separating the seed components as well as impurities from the harvested lot. The
air-screen machines were found effective in removing dead seeds, whereas specific gravity
separator removed abnormal seeds significantly. Gradual increase in seed quality was
recorded with decrease in recovery in the processing line. Seed loss in reject port was always
associated with handling of seed lots by each machine and observed only 1.30%. Specific
gravity separator was found essential for the seed lot of medium-term storage or for the buffer
stocking.
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