Handhabe das nun auch schon 2 Jahre so.Verdammt hilfreich!
From Cliff Warren
Earlier this winter I was told about the "drop test". This really works, and should be used by every grower. Simply take your seeds and drop them onto a hard surface. A wood table works best.
Very quickly you will become accustomed to the tone or note that each seed gives. Generally, good full seeds will give a very muted sound, almost a "thud" sort of sound. Empty seeds become very easy to detect, they give a very light "tinny" sort of sound. Then you will also find some seeds "in between".
I separate the seeds into three groups based on this test. Almost without exception, I can accurately categorize the seeds into "full", "half-full", and "empty" categories. (I've verified this by opening the seeds.) This was done on my 468 seed stock, which seems to be about 30% empty. After doing the drop test on a handful of seeds and selecting the best, germination tests are 100%!
