what is seed drying system?

what is  seed drying system?
the  seed supply chain is a complex system that spans the globe, where many seeds pass through several international borders or fields around the world before being planted by the end user, i.e. the commercial grower. for example, tomato seed production can travel between five different countries before being planted at its final destination. each location where the seed is produced/reproduced has its own pathogens for its region that may not be present in the final destination. some disease pressures experienced by the last grower may be due to seed-borne pathogens carried over from the seed source.
why is  seed cleaning ımportant?
for baby leaf, swiss chard manufacturers say bacterial leaf spot aka bls can be devastating. ın a matter of days, a perfectly healthy field ready for harvest can be destroyed due to bls introduced into your field by the contaminated seed. diseases such as verticillium or fusarium can be transmitted and transmitted to your field through the spinach seed. ıf your seed is contaminated, the disease can spread to your soil and cause yield loss, with the potential to affect your next lettuce planting rotation.
seed cleaning, often referred to as seed disinfection, is a hot water treatment usually done to clean seeds from pathogens. hot water seed cleaning methods run the risk of damaging your seeds' germination and shelf life.
malformed, discolored, germinated, broken or moldy grains in seed lots can severely affect seed quality, vigor and viability.
visually inspect the seed before storage and consider removing these grains from the seed batch.

a seed cleaner uses a combination of sieving with a fan to remove lighter particles (e.g. empty grains) and sifting on an oscillating sieve to remove smaller particles (e.g. grass seeds) and larger particles (e.g. straw).
 seed classification
for commercial seed processing, seed grains must have a uniform size and weight. a variety of commercial equipment can be used to achieve uniformity in seed size and shape. these include gravity tables, rotary screens, recessed rollers and length graders.
 seed purity
maintain seed purity by avoiding mixing and contamination with other varieties.