Hi Joe
I am a keynote speaker at the Northern California Permaculture Convergence Oct 12-14. (Friday - Sunday) then I am teaching a 5 day workshop in the window from Monday Oct 15 - Friday, Oct 19, 1 day on Patterns & Design, two days on Earthworks and Water, and 2 days on Food Forest systems.
I do not have any other plans for PDC teaching in the US but you never know if the right invitation comes up it could happen. There is a possibility of doing an earthworks implementation course on the ground installing a job in Texas possibly.
I am glad you enjoy the talks, I do too as long as it is helpful then it will feels good at my end too.
Your soil needs to have good
compost inoculate, that is very good quality life rich compost with very high numbers and diversity of beneficial soil life. The important ingredients in the compost are fresh green and chopped weeds especially the persistent ones and any prolific introduced plants legume pioneers or even not legume pioneers from the same soil you want to fix up.
http://permaculture.org.au/2005/09/11/fast-compost-soil-permaculture-design-and-maintenance/
http://permaculture.org.au/2008/07/26/18-day-compost-the-appliance-of-science/
http://permaculture.org.au/2006/04/22/compost-miracles/
http://permaculture.org.au/2011/07/20/paul-taylor-on-composting-video/
http://permaculture.org.au/2012/07/11/compost-teas-and-extracts-brewin-and-bubblin-basics/
These links should get you started, and remember to also just keep deep mulching and greatly reduce or possibly stop digging just scratch the soil surface to prepare a seed bed and you will lock up residual toxins, and correct imbalances faster than any other system. The carbon pathway then becomes the carbon lock as producer of a long chain molecular linking mechanism and toxins then become inert.
Good quality compost tea sprayed on the soil will help speed all this it up and give you some initial relief if used as specifically targeted foliage spray (specifically designed compost tea for specific crop), good biochar will help increase the habitat for the beneficial soil micro-organisms. Use earth worms counts per shovel as a good indicator that it is all working.
We have 2 dogs the little black and white one is Jacky and is an Australian Tenterfield Terrier and her job is catching mice and rats, and a larger blue one called Bluey and is an Australian Stumpy Tailed Cattle dog and she is a guard dog, fox excluder, cattle dog and incredible swimmer life guard.
Cheers Geoff Lawton
Check out www.permaculture.org.au/permies