What do you do once you used weedkiller?

I need to know as well.  Husband is threatening to get a digger in as we need to level the plot.  Do you dig up the dead roots when the weedkiller has done its job?

I assume you are using glyphosate, if so you should bag it and trash it. From what I have been told not all the glyphosate gets broken down straight away and can act to inhibit seed germination and growth if it stays in the garden. Burning anything at low temps that has chemicals in it is not a good idea either (all fires produce Dioxins but far more so if there is plastics or other chemical products in it). Best path for it is to the local incinerator where it gets burnt at very high temps. Composting it acts to concentrate some chemicals as well so thats not a good idea (most compost produced from council green waste has relatively high levels of Dioxins for example).  Certification as organic doesn't really mean a lot I dont think - all you have to do is stay off the 'bad stuff' for a couple of years but as far as I know they don't test your soil for pollutants or any of the potentially really dangerous stuff (like Dioxins) anyway. Pesticides are a totally different story however.

BTW After lots of searching I bought my 1Litre Roundup Bioactive concentrate on ebay for about half the cost in the shops for the same size/strength (if you can find it) and about 5% of the price of the mixed up stuff in 500ml bottles they all sell in B&Q/Woolies etc

Do youmow it all back then throw away the foliage?
I have read people talking about 'burning off' the dead plants, but I think that would be dangerous as I have neglected sites on both sides of mine.

Can it all just be rotovated back into the ground, or is that really bad ?
(I know, I know WG it's all REALLY BAD! but I need to do this to get started)
advice please.

Thanks
Lucy

Once my weedkiller had killed the weeds I rotovated everything.  That was about 2 months ago.  That seemed to do the trick.  Although weeds are back it is easy to manually pull them up and weed as normal now.  The rotovator did its job of loosening everything up.  My allotment was really quite bad with weeds.  Have a look at my Lottie web page to see some pics of what I mean.