Weeds

While cleaning up our section, we discovered a large amount of ivy shared between us and our neighbour on the boundary. Is there an effective way of eradicating ivy as it is climbing up into the trees? 

My vegetable garden is full of Oxalis.  How do I get rid of this as I want to plant a rose garden in its place?

Are there any new ways of ridding oxalis from your veggie garden?

I’m trying to clear a small garden plot that had some type of bulbous evergreen type plant growing. I’ve cleared it all out but the soil is root filled. How do I condition the soil ready for vege planting?

Oxalis is all around my garden. Spray products are effective for a short time but it always comes back. I laid weed mat covered with pea straw but it grew through. What else might work? Could sieving the soil get rid of them?

Can I use a weed killer/s on my vegetable garden to clear weeds before planting? Is there anything available that won’t affect germination and growth production?