There are many problems with poor seed, and spotted and discoloured seed are some of the major ones. Spotted seeds can't be removed by winnowing or seed flotation. They can only be removed by manual sorting. This video will show you how to clean seed as one of the interventions to produce and use healthy seed.
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6 years ago
Agro-Insight, CABI, Countrywise Communication, IRRI, RDA, TMSS