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Politics : Formerly About Advanced Micro Devices -- Ignore unavailable to you. Want to Upgrade?

To: bentway who wrote (444720)	1/4/2009 10:51:32 PM
From: tejek	Respond to of 1573075

"How many seeds didn't germinate?" I have no idea Ted. But, I have the idea that seeds generally last a while. I have myself grown dope from seeds over 20 years old. The majority of seeds germinate readily in the first year. After that, germination is at the whim of nature. "Seed dormancy and protection Further information: Seed hibernation One important function of most seeds is delaying germination, which allows time for dispersal and prevents germination of all the seeds at one time. The staggering of germination safeguards some seeds and seedlings from suffering damage or death from short periods of bad weather or from transient herbivores, it also allows some to germinate when competition from other plants for light and water might be less. Many species of plants have seeds that germinate over many months or years, and some seeds can remain in the soil seed bank for more than 50 years before germination. Some seed have a very long viability period, with the oldest documented germinating seed carbon dated to be 2000 years old.[15] Seed dormancy is defined as a seed failing to germinate under environmental conditions optimal for germination, normally when the environment is at a suitable temperature with proper soil moisture. Induced dormancy or seed quiescence occurs when a seed fails to germinate because the external environmental conditions are inappropriate for germination, mostly in response to being too cold or hot, or too dry. True dormancy or innate dormancy is caused by conditions within the seed that prevent germination under normally ideal conditions. Often seed dormancy is divided into four major categories: exogenous; endogenous; combinational; and secondary." en.wikipedia.org