Please help...in my backyard, there's a patch of what used to be grass, but now is just dried up soil with weeds. I want to prepare the area for an organic veggie garden. However when I went to work with the soil...pull weeds, loosen soil, check how deep the soil goes before I hit (concrete?)...I found that I only had about 1.5-2 inches of soil before there was solid bedrock/concrete underneath...is this possible?...and...oh great, now what? Am I forever unable to plant a veggie garden over this? Then, as I work I find there's an old layer of plastic netting. Some parts were broken up as I was de-weeding and raking...I'd try pulling some of it out to toss out, but the whole area is overlaid with the netting. What am I to do with it? It obviously doesn't decompose. Thanks in advance for your advice!!