use the same pH adjustments you would use in hydroponics.
Soil is really not that different when its not full of bacteria and microorganisms.
Use phosphoric acid, same as a hydro set-ups pH down.
If youre being organic etc, phospshoric acid exists in nature. Some micro organisms make it so dont worry.
Try coco coir. it has the stability and insulating properties of soil, while feeding it as hydro, we get all the benefits from accurate nutrition.
Its the easiest way to go ive ever tried and ive fucked around with a lot of ways.
coco grow
coco bloom 2 part mixes
a pk- phosphorus and potassium bloom additive.
pH down.
and thats it. good strain, 8oz-1lb per 400w HPS.

Dont fool yourselves. soil is only soil if it is alive. you basically have potting mix. coco is a good version of potting mix.
calcium, lime etc. trouble. its too easy to do handwatered hydro in coco fibre.