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Bermy · 10th May 2008, 05:54 AM

What a fascinating thread!
Thanks for all your photographs and reasoned discussion, most informative!
I especially liked Sean's discussion of the root failure, rotten roots vs live roots and the evidence in the pictures.

For what its worth, and I could be way off base here, I did notice in Ekka's pictures of the last tree to go over that the soil near the top of the profile had a distinctive dark grey layer. To me that indicates some anerobic conditions, the soil turns dark grey when there is insufficient oxygen, usually due to compaction. The key is to smell it, rotten egg smell. Given all that has gone on around these trees its probably not a factor on its own, but in combination with all the other stuff...? Or is it just the properties of your local soil?

10th May 2008, 05:54 AM	#39 (permalink)
Bermy Semi-mature vigorous tree Join Date: Jun 2007 Location: Bermuda Posts: 67	Re: New Farm Jacarandas What a fascinating thread! Thanks for all your photographs and reasoned discussion, most informative! I especially liked Sean's discussion of the root failure, rotten roots vs live roots and the evidence in the pictures. For what its worth, and I could be way off base here, I did notice in Ekka's pictures of the last tree to go over that the soil near the top of the profile had a distinctive dark grey layer. To me that indicates some anerobic conditions, the soil turns dark grey when there is insufficient oxygen, usually due to compaction. The key is to smell it, rotten egg smell. Given all that has gone on around these trees its probably not a factor on its own, but in combination with all the other stuff...? Or is it just the properties of your local soil? __________________ Keep smiling, people will wonder what you are up to! (especially if you're gunning a chainsaw!)