Are you wanting to be organic about it or are you OK with chemical fertilizer?

You will want to post this over on the Soil & Composting forum here too as this is the kind of issue that forum deals with daily.

As to what to provide to meet those requirements, there are many options available - both organic and non-organic and the costs range widely. But if you intend to continue gardening then yes, the time and money is well worth it.

Dave

Here is a link that might be useful: Soil forum

Billy, Your question and wording leave me a little unclear of what you want to know and the replys seem to reflect that uncertainty. If you are questioning the expenditure for fertilizer for a 700 sq. ft garden it just doesn't seem logical. More likely you are questioning how to obtain a fertilizer blend to adapt to the recommendation. To that end you need to be more specific in your test results but, in reality, you only need to be in the ballpark with the application.

Keep in mind that your Nitrogen recommendation is almost always based on crop needs rather than test results; Phosphorus recommendation is usually expressed as P2O5(phosphate) as you indicated but Potassium recommendation is almost always expressed as K2O rather than just K and that distinction can affect what you apply.

What you likely should be shopping for is a 3:1.5:4 ratio blend. In real life if you can find a 10:5:10 or even a 10:10:10 fertilizer and apply at the rate recommended for N you will be in the ballpark.