Potash, dolomite lime, trace elements. blood and bone?

Are they all organic? Are any of them cheap and easy to make or should I just buy them? And if I do buy them how much do I buy and what is the going price rate? And when I have them how much do I use? when do I use them? how do I apply them when I use them? what do I use them on? And lastly what are they make out of?
I am out of questions for now but I mite have more for you lot later.

Any advice will be greatly received.

They are all "organic" - but not generally necessary !

I do use fish blood and bone as a fertiliser - but only in situations where the ground is really depleted (after removing conifers for example) It's really effective and long lasting (and greens up and weeds a lawn like nothing else) but once every few years is enough even for traditionally managed lawns.

Potash - make yourself - just keep it bone dry till you use it.

Lime is cheap - but only occasionally required - maybe stone fruit trees and I guess in very acid veg plots - I'm on just acid clay and I've never used it.

everything else just add mulch