If you could produce dryland crops without using tillage or herbicides in this climate, you would make my day, and revolutionize dryland farming. Millions of dollars are poured into eastern WA dryland wheat acres trying to develop a system that is more
sustainable. Lots of big wig university researchers. But they are all looking for solutions applicable on the 1000s of acres scale.
Here's my brainstorming for the 1 acre scale:
I really think that incorporating livestock is the key. Perhaps use a small hand-powered seed drill to plant winter wheat, weed by hand the next spring. Harvest with sickle, leaving as much stalk on the fields as possible. The standing residue is essential for preventing wind erosion when the wheat is not growing. Stock
chickens lightly in the first fall after harvest to glean fallen seeds (preventing
volunteer wheat the second year). Run goats over the field as quickly as possible every few weeks in the spring/summer the second year to eat all the green weeds. It would need to be so fast that they don't start eating the standing stubble, or knock too much of it down. Probably would need to move them twice a day at least. Drill seed again the third fall and repeat.
Perhaps a cover crop could be drilled in the off year, but it would probably need to be terminated much earlier than cover crops normally are, in order to save some moisture for the second year. I know of some large scale farmers experimenting with brassica cover crops near the Dalles - 10-12" precipitation. It's been rough going for them. As far as I know, no one has even attempted doing cover crops or annual cropping in areas with less precipitation than that.