You will find that as you continue to spread wood chips every year, the level of your soil will continue to rise. Basically, you'll start to see a layer of decomposed wood-chip humus accumulating below the top-layer of still-chunky wood chips. Below it all is your original garden soil.
So, from the soil surface downward, the layers would be:
1. Wood chips on the surface
2. Fine, black, friable humus (decomposed chips)
3.
Native top soil
4. Native sub-soil.
The distinction between layers 2 and 3 will be erased over time. Worms and other biota that are moving up and down through the soil profile will blur that distinction. Whatever minimal tillage that takes place as you garden (as you dig holes and pull out spent plants) will further mix the native soil with your wood-chip generated humus. This will happen over the next few years (as long as you continue to add a fresh layer of chips to the soil surface every year. If you should stop adding chips, the microbial and fungal life in your soil will continue to "eat" that
carbon, and in time, the soil will slowly revert back to the original level.
I use keystone landscaping blocks to mark the transition between the
lawn and my garden beds: two course high -- about 8 inches above grade. Over time, those garden beds have gotten higher and higher in contrast to the original level of the
land (as marked by the lawn). The heavy clay lawn soil is still pretty much what it was 18 years ago when we moved into our place. But where there have been wood chips added, you can see the difference both in the soil profile that is now 4 to 6 inches above the old level/grade, as well as deep into the subsoil.
There is a need to temper our expectations to come into alignment with reality. B2E is a wonderful method. I've gardened this way for many years and my soil is living proof of the wonderful strategy of adding biomass to the soil surface yearly. But it's not the one-time miracle cure of all that ails poor soil. You have to continue to build soil using other means as well. Composting, cover-cropping, chop-and-drop mulching, grazing animals over the land (even
chickens), adding bio-char . . . all these things contribute to soil health and
feed the soil food web. All are based around the central principle of adding carbon to your soil, as well as capturing
energy (sunlight) and
water.
Best of luck with your ongoing soil building process. Best of luck with your garden this year. Please bookmark this
thread and then come back to give us updates as you continue to observe and interact with your soil.