To test your soil get a clean spoon that is free of rust and dig down to about 8 inches in about 12 different places and put the soil in a zip lock bag until you have about 1 1/2 cups. Don't touch the soil at all with your fingers. A drop of sweat or a flake of rust can throw off the soil testing because of salt that can come from your hand or rust from a shovel. Usually within a week or so you'll get your soil test results and for a few bucks more the results will come with instructions on what to add to the soil.
I usually send my test results to a few local growers and a couple of heavy hitter pumpkin growers asking what I should add to my soil in the spring. The answers I usually get back are somewhat varied (there is a lot of science that goes into soil and plant studies but the science isn't very clear and growers experiences and opinions vary). Based on the feedback I get I'll add additional amendments in April and till that into the ground.
I was pleased to run into a few worms in the patch while digging around. I didn't expect to see any thing time of year. I see lots of organic material in the soil and it has a nice, dark earthy smell to it. If I can get some time away from my website business I hope to grow big this year. I've got to get over 1,000 pounds.