When I started my vegetable garden in its present spot about 12 years ago, I had the soil tested. The test came back with recommendations of what to add and how much. I added lime, magnesium sulfate, 10-20-10 fertilizer, and I don't recall what else according to the test recommendation. I had a great garden that year and every year since, but it seems to me that it dropped off just a bit last year.
I add compost to the soil every year, and every spring I till in some 10-20-10 before planting anything. I haven't added any lime for 12 years though, and we've had lots of torrential rains since I did. I last had the soil tested 3 years ago and they said everything was perfect, don't mess with it. The soil pH was 6.8 at that time.
I'm thinking it's been 12 years and maybe tilling in 100 lbs. of lime along with the 10-20-10 would be good before I plant anything. My garden is 35' x 50' = 1750 square feet. What do you think?