We've just built a new limestone retaining wall to replace a decaying railway sleeper wall. In the process we've made it quite a large bed and will need some soil to back fill it. I am pretty keen on getting a dingo in to help level our back yard and get rid of our "Basikin and Robbins" lawn (31 flavours), so that we can have backfill for our garden bed and some level ground for new turf.
Our lawn has lots of weeds in it also (onion weed being the most prevelant), but I am hoping that if all the current turf is put at the bottom layer, then the weeds/grass will just act as organic matter for the garden. We will look to get some organic soil and whatever else we need to nurish fruit trees for the top 300 - 500 mm of the garden bed. Am I right in saying that the top 300 - 500mm is the most important in terms of nutrient rich soil? My wife went to the Great Food Gardens workshop and was told that the feeder roots of plants can't extract much more from soil deeper than that as there is no oxygen and or light to feed the plants so they get all their nurishment from the top 300mm of soil.
Anyway, below are a couple of pics of the space behind the wall and also of our crap lawn.
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Retaining wall. North is to the right of the picture so we get quite a bit of shade in this bed in winter, and then full sun in summer.
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Back lawn and you beaut clothes line
![Wink ;)](./images/smilies/wink.png)
Any recommendations on how to prep the soil and whether we can use our lawn for the first layer of fill is much appreciated. Any ideas on how many fruit trees we could get back there is also appreciated.
Thanks,
Chris