... : seedSpecification: 5:1,10:1,20:1Test method: TLCIntroduction Tuber onion is dry mature seed of Allium tuberosum Rottler. Seeds in ... dark, grain full, without impurities is preferred.It contains volatile oil and sulfide, protein, fat, carbohydrate, vitamin B, vitamin C, ... is a company specialized in offering high quality tuber onion extract 10:1,onion,allium cepa, seed. We have well-trained and ...