Healthy soil and sustainable growing

["J Bailey" <jbmail@isomedia.com>]

One of my paddocks runs along a road that gets truck traffic to & from a 
gravel pit. There is a shallow grassy "ditch" next to the road, then it 
rises a bit to the salmonberry brush patch in that paddock. Nettles grow 
there, and there used to be locust trees trying to sprout, but we got rid of 
them. I am wondering if there is any kind of shrub or plant I can naturalize 
there that might help take up any pollutants from the traffic so the 
critters won't be exposed as much when they graze there. I'm sure the ditch 
helps some, but the less leaching over, the better.

--Joanna

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