Having the lab perform a 1000 seed weight can help you to
determine your ideal seeding rate which will allow you to
get the most out of your seed. We calculate the 1000 seed
weight in the lab using the International Seed Testing Association
(ISTA) rules. The sample is mixed down to obtain an accurate
working sample and then pure seeds are selected for weighing.
Changes in moisture content will affect your 1000 seed weight;
therefore to obtain the most accurate result, have your seed
tested as close to seeding as possible and send your seed
in a moisture proof container.