Another update:
So the split system has been operating for a year now. It was a resounding success! Here is the breakdown:
I have a 2-split system, one side garden, the other side chicken run, and swap yearly. Each side is 3000 sq. ft. This year's chicken run is always next year's garden.
We now have 14 chickens. My wife wanted to see little fuzzballs out there so we hatched some chicks. They hatched ~May 29th, 2017, and are big now. We are still using fermented feed.
The hay is breaking down incredibly fast due to the agitation and manure. On the chicken side of the system, I have put down about 9 big round rolls of hay this year! Currently the hay is 6" thick and the chooks are having a ball with it.
There seem to be no more bugs on that side. But there were two species of plants the chooks won't touch: one is a clumping grass, and the other a flowery weed with small leaves. I had to deal with them manually.
Additionally, we tested the idea of sequestering a section of the run to plant spinach for the chooks to eat. In the end it was *not* worth it. We got spinach, but also weeds to deal with. After it was said and done, that very large spinach patch only lasted 2 days when the chooks were released into it. Not enough payback for the labor involved.
Originally, I was to swap the sides once a year, but the learning process here has showed me something. So, in April the chooks spent 2 weeks on the garden side (prior to planting) and debugged it for me, and then after the summer garden was done, they were put back there for another week for more debugging. Then I planted fall veggies. The result of this? Minimal insect damage in the garden. In my area, insect damage is a notorious threat to all gardens. The fact that I actually have cabbage growing right now is a testament to the power of only 3 weeks debugging time.
So the chooks have been inhabiting the run side (mainly) since last October. I can only imagine how many bugs they've destroyed, along with bug eggs and larvae. Add in weed seed consumption and the addition of all that manure, and I think I've got something really good going on. I will have to broadfork the ground in spring, I will not use a tiller.
I expect the results of the 2018 summer garden to be outstanding. 2017's summer garden (and now fall garden) are/were both fantastically productive and almost labor-free for me.
Remember, under my system, this year's chicken run is always next year's garden. The soil in the run is looking like the best stuff I've ever seen.
Thanks!
-John