The more legumes and squashes you grow there the less alkaline the soil will become also you might consider making
compost and using that to create compost extracts and teas to use for watering your crop plants.
Grasses will also help but mostly you want to get sulfur compounds working into the soil as you go along too. With a lot of calcium already there you might want to look at trace mineral sulfur compounds (sulfates and sulfites of copper, etc.)
If you can get a full scope soil test done, it should come with some recommendations to get the pH at least neutral. I am rather surprised that spruces are there since they are usually found in soils more towards the acidic side.