We have observed a dozen Hyades K dwarfs at high resolution and high signal to noise to see if they show a spread in their Li abundances like the spread seen among Pleiades K dwarfs. We cannot detect a Li feature in these stars, but we see no differences in their spectra at the Li 6708 Å feature that exceed 2 mÅ. This suggests the Hyades K dwarfs lack the spread in Li seen in Pleiades K dwarfs, indicating a different history of Li depletion.
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Soderblom et al. (1995) studied this question.