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Meanwhile, Auburn has started removing the poisoned soil surrounding the two oak trees at Toomer's Corner on the university's campus. Horticulture professor Gary Keever said the process of putting in fresh soil should be finished Wednesday.
Keever said they're removing soil down to about 18 inches, and samples will be tested to make sure that was deep enough.
He said they might know the fate of the trees by this summer or it could take years.
"They listen to their own drummer," Keever said.
He said symptoms from damage to the trees would likely become visible in April and continue through the summer. That could include leaves yellowing and falling off.
"What will happen soon is that as those trees begin to try to grow, that growing process will pull water and nutrients up from the soil," he said. "In the process, it will pull the herbicide up with it. What was absorbed, we're probably not removing."
Keever said if the recent warm weather continues, that could accelerate the spread of any absorbed herbicide.
He said the workers include volunteers -- Alabama fans, he says -- from American Plant Services in Sylacauga.
"They're doing everything they can to help us, and they're donating the services," he said.
Copyright 2011 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.
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