Digging to turn the soil seems like an old adage that has been passed down through generations, but modern scientific studies are now showing it provides very little to no benefit for yields.
After closing on their new house he asked me for a shovel, for which to install a mailbox. Of course I'd help my friend out. "Sure, buddy!" I said. "Here's a shovel, post-hole digger, pickax and a rock-bar. That should get the job done." After I explained to him that yes, you need a 20 pound pointy chunk of steel to dig any sizable hole around here, he still didn't quite believe me. However, once he got the mailbox planted, he adjusted his beliefs accordingly.
On the rare occasion that I have to dig a hole somewhere with actual dirt, I always find myself amazed at how easy it is. Those times help me understand scenes in TV or movies that include someone digging a hole. Those scenes don't ever depict someone deciding to move whatever it is they're putting in the ground because they hit a massive stone at 8 inches into a 24 inch hole, and there ain't any getting through it. The scenes don't depict the Herculean effort required to just plant a tree. Those shows don't show the absolutely back-breaking labor it takes to be a landscaper around here. And before I had the chance to do the same kind of work in actual soil, those scenes just didn't make sense.
Digging a hole of any depth would probably require explosives!
What is the purpose of planting clover?
(It’s the bacteria in the roots that do the actual nitrogen chemistry.)
"If you mix sand into clay, the clay particles will fill in all the open spaces between the sand particles and often the clay will act as a ‘glue’ sticking all particles together, ultimately resulting in a more dense soil."
For sure. In Dowdings method you put a quite thick layer of compost on top of the existing soil. You then top up the compost every year.
He's a soil vampire, sucking in fertility from somewhere else to feed his own garden.
Compost material can be easily acquired for free. Grass clippings. Wood chips from tree surgeons. They will literally drop it off on your site for free. They have truckloads to get rid of every day. Restaurants. Coffee shops if you are doing it on a smaller scale.
Tree surgeons/arborists are always trying to get rid of chips
An acre? Charles Dowding is a market Gardner, not a farmer, but he has done it on a scale of a few acres.
His compost is a mixture of
1) homemade. When you are trying to expand a plot growing stuff to compost can help. Grass clippings, waste from the garden etc. This is a minor source of very good compost.
2) woodchip, see above
3) green waste. This is other people's garden waste, normally composted poorly by a local authority. You want it some time before you use it so it can compost more fully
4) farmyard/ horse manure
5) spent mushroom compost. Actually I never saw him use this, but it is very common.
One farmer I saw said the secret of no till is 'other peoples carbon', you are correct. But some people have carbon to get rid of.
If you start with Charles Dowdings 6 inches of compost on top, that is not necessarily true. The soil comes to life as worms go mad pulling that compost down into the soil.
It actually works rather well. Year 1 can be very good. Year 2 even better.
The real disappointment in Year 1 is the amount of weeds that find 6 inches of compost no barrier at all! With digging you can get a lot of perennial weed roots out, and hoe off the annuals. With no dig you have to pull them.
I'm not a idealogue, so actually suggest glyphosate before compost...but people don't normally like that suggestion.