Seed Production and Dissemination
Pignut hickory begins to bear seed in quantity in 30 years, with optimum production between 75 and 200 years (16). The maximum age for seed production is about 300 years. Good seed crops occur every year or two with light crops in other years; frost can seriously hinder seed production (22). Usually less than half of the seeds are sound (2,3), but 50 to 75 percent of these will germinate. The hickory shuckworm (Laspeyresia caryana) can seriously reduce germination. Pignut seed, averaging 440/kg (200/lb), is lighter than the seed of other hickory species. The nuts are disseminated mainly by gravity, but the range of seeding is extended by squirrels and chipmunks.
Other articles related to "seed production and dissemination, seed, seed production, seeds, production":
... The seed is dispersed from September through December ... Mockernut hickory requires a minimum of 25 years to reach commercial seed-bearing age ... Optimum seed production occurs from 40 to 125 years, and the maximum age listed for commercial seed production is 200 years ...
... In forest stands, black oak begins to produce seeds at about age 20 and reaches optimum production at 40 to 75 years ... It is a consistent seed producer with good crops of acorns every 2 to 3 years ... The number of seeds that become available for regenerating black oak may be low even in good seed years ...
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