Red Top seed
When Red Top is grown for seed it should be harvested when the seeds are easily rubbed out. Commercial Red Top, as a rule, contains a great amount of chaff. So-called recleaned seed is nothing but ordinary seed from which some of the chaff has been removed. Ordinary commercial seed is reddish brown with a silvery sheen. The more silvery the lustre, the less the chaff and the heavier the weight. When the proportion of chaff is large, the weight is rather low, sometimes not more than eight pounds per bushel. Recleaned seed containing little chaff may weigh as much as thirty-five pounds a bushel. As a rule the seed germinates well as it retains its vitality for several years.