This is worm casting creation, soil improvement and recycling all in one.
For a long time, I have been intrigued by growing plants merely from the remains of other plants. I think that a fully grown weed plant contains all the nutrients needed to grow that plant. Therefore, you could fill this trench with plants other than fruit and vegetable scraps - male weed plants, other herbs/weeds like comfrey, cow parsley, stinging nettles, etc.
(YOUTUBE) Vermicomposting Trench - All Natural Fertilizer Factory for Your Garden!
http://www.youtube.com/watch?v=Jl2XybtZ1dA
For a long time, I have been intrigued by growing plants merely from the remains of other plants. I think that a fully grown weed plant contains all the nutrients needed to grow that plant. Therefore, you could fill this trench with plants other than fruit and vegetable scraps - male weed plants, other herbs/weeds like comfrey, cow parsley, stinging nettles, etc.
(YOUTUBE) Vermicomposting Trench - All Natural Fertilizer Factory for Your Garden!
http://www.youtube.com/watch?v=Jl2XybtZ1dA