
AOSA, ISTA and Canadian rules are followed for germination. In addition, we have developed vigor tests for selected crops. For example, we use vertical blotter to determine sprout length (and thus seedling uniformity) of lettuce. We also determine growth rate (rapidity) of roots by comparing to control lots. Rate of emergence is is also used to determine seed vigor. For example, 24 hr and 48 hr emergence counts are used as an indicator for lettuce vigor