Fire to sterilise soil...

I admire your ingenuity Bing 

Just ask Heath Robinson to help with the construction of a stand for the magnifiers and then of to the Dragons' Den with you 

Hi I don't know if this is helpful to any one but i use fire to sterilize my allotment its fairly time consuming but i found it works a treat, i started the allotment 4 years ago and it had a heavy cover of weeds so i used a sheen flame gun to first burn them to kill them, then a week later i went back over after a hot week and re did it with the flame gun, it left a nice fine chard residue behind it also if you go over slow cooks the top inch or 2 of soil killing anything in that layer now after 4 years i hardly have a weed dare show up, all but the few blowing in from else were on the wind but i make it my annual clean up job, the other thing i do with the flame gun is if i have had a problem with club root i careful uproot the plants leaving the hole open and burn the localised areas that's suffering it, then i lightly turn just the localised area a couple times re-burning it and so far its worked quiet well, no idea if its just good luck or great management but i tend to go with what seems to work obviously it helps on other infestations too as long as your careful to try get all the effected area, now i have a really nice allotment that's much cleaner and easier to maintain.
Happy gardening. 

Hi James I’m pleased that approach is working for you & I have in the past used a weed wand for small areas. But last year I decided to go down the no dig route & became more interested in preserving the life under the soil, all the mycorrhizal fungi & bacteria’s & organisms that are essential to what I believe to be a healthy soil for healthy plants to thrive in. Just a different perspective for you to consider😊

Just think of the reactions of the neighbours. Do they like bonfires?

i watched this done on the victorian kitchen garden.... harry heated the soil in a large bath type thing with a fire lit underneath. he said it was a good way to sterilise  the soil