Filling a downwards slope at end of yard
Don't know whether this is the right place to post this - but I'm giving it a shot! Does anyone know what method should be done to fill in a slope? The situation is as follows (I'll do my best to describe it in words!)
Our yard is about 15 ft wide, and slopes down gently and evenly at the back, ending at about 3 ft deeper than the rest of the yard. The entire slope is about 5ft long (it starts sloping downwards from about 5ft from the back of the garden). The back of the yard ends as a raised vegetable bed that is about 3 ft tall
My question is whether or not we can just fill in the ditch up to the vegetable bed?If so, what would be the suggested means to do this? Just dump soil in? I have in the past done lasagna gardening (I don't know whether that's the proper name) where one lays down a layer of cardboard to supress the weeds underneath, and then puts topsoil, followed by mulch on top.
Also, the yard is surrounded by those wood plank fences - how do we prevent the soil from spilling/eroding into our neighbor's yard on the sides if we fill in the ditch?
The final complication is that there is a tree growing at the end of the garden as well (a huge pine) inside the ditch.
I know it's hard to imagine this - apologies for not having any pictures! I would appreciate any advice or experience in this issue!