A> native alkaline soil
Ouch. Most of my farm is the same. It’s rich ground, but it has lots of issues. Manure is great, but alkaline soil can go the wrong way with too much, as it is a rich but troubled soil.
mine is high ph, some goes up to ph 8, 8.2. Real high CEC, which is a measure of how tiny the clay and organic particles are. The organic matter on mine goes past 9% in spots, which is high.
all of these features make it difficult to change the soil. It likes to lock up k, so adding a little it ends up just binding to the soil. Adding a lot, it needs a terrible $$$ lot because of the high CEC - sandy soils you can change with $50 of stuff, this heavy ground would need $400 of stuff per acre....
low ph you can change with lime. High ph is very difficult to change, lots of sulphur can do some. But again, the heavy CEC soil acts like a sponge and absorbs a lot without changing much. Really can’t afford to lower it......
and so on. Some alkaline is salty, then manure makes that issue worse. Mine is not salty.
legumes like soybeans and related beans often don’t like this soil, they can’t grab iron out of the alkaline so they just stunt and turn brown. Theiron is in the ground but many strains of beans can’t pry it away from the high ph alkaline.
on the other hand, it’s a deep rich soil, corn loves it. Holds lots of nutrients and water.
obviously, I’m more of a farmer, and I’m not even organic, but the same issues and fixes are important, just what ever materials you choose to work with your soil.