During the last years soybeans seeds have presented serious problems concerning
quality due to the occurrence of a high percentage of green seeds in the lots. This study was
carried out with the objective of evaluating the effects of different contents of green seeds on the
physiological quality of soybean seed lots. Five percentage levels (0, 10, 20, 30 and 100%) of
green seeds were studied using the MG/BR 46, COODETEC 201, BRS 138 and EMGOPA 302
cultivars. The following seed quality parameters were determined: germination, vigor (TZ 1-3),
viability (TZ 1-5), weathering damage (TZ 6-8), mechanical damage (TZ 6-8), and sting bug
damage (TZ 6-8). A randomized complete design with four replications was used, and mean
separation was done by the Tukey test (P0.05). Samples with more than 10% of green seeds of
four cultivars had their vigor and viability significantly reduced. Furthermore, high levels of
weathering damage to the seeds were found in all cultivars. The results showed the lots with more
than 10% of green seeds presented germination percentages below the minimum standard for
commercialization (80%).