*The intent is to raise the *dykes somewhere between 0.5 and 1 metre. Does anyone have *any experience with raising soil levels around trees or have any guesses *as to the effects of raising the soil level and what can be done to *ameliorate the changes? *Thanks for your help. *Margaret Penner A scientist could better answer this but I did see one case worth mentioning. While in New Jersey, I found a case where a developer piled soil a little better than1.5 - 2.0 meters around two fairly healthy, large, mature American chestnut trees killing them in 2 years. (Of course mature American chestnuts aren't what you would consider a model of health and a perhaps a red oak would have managed fine. ) Intuitively, I believe the problem arises with the burying of the roots too deeply than they were intended, effectively choking off the tree from moisture, nutrients, beneficial organisms such as fungi, etc, etc. But then again trees are fairly robust like people who have become perfectly satisfied living with smog and traffic, a tree could perhaps become accustomed to being buried if performed gradually. If the soil raising could be done in gradual stages, say .25 - .5 meters/year, it might ameliorate the stress of burial. But again that's a guess. Regards, John Vona
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