Seed processing is the preparation of harvested seed for marketing to farmers. The processes involved include drying, threshing, pre-cleaning, cleaning, size grading, treating, quality testing, packaging and labeling.
Seed lots received from the field are often at high moisture content and contain trash and other inert material, weed seeds, deteriorated and damaged seeds, off-size seeds, etc. The processing of seed is necessary in order to dry the seeds to safe moisture level; remove or reduce to the extent possible the various undesirable material, weed seeds, other crop seeds, deteriorated or damaged seeds.
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The objective is to obtain the maximum percentage of pure seed with maximum germination potential.
Apart from enhanced purity, health and germination, well-cleaned and good quality seeds have other benefits, all of which increase their market value: improved visual appearance, reduced seed rate, uniform emergence and crop stand, high yield and long shelf-life.
The major steps involved in processing are:
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