Getting to know the soil is going to really help you cut back on a lot of hardship when it comes time to actually plant or create a garden this spring. The quality of the soil you want to plant in really matters because anything already in the ground has a good chance of ending up in your food.
Knowing as much about the history of the space is important here, so talk to your neighbours. If your area used to be farmland or anything agricultural, then you are totally golden. Odds are that the soil is pretty good at growing things.