What is your soils pH?
What nutrients does your soil need?
How much organic matter does your soil have?
What and how much to use depends on the answers to those questions.

Hardwood ash - 0.00 pounds per 1,000 square feet

Soybean meal - 20-40 pounds per 1,000 square feet

The only thing ash might do is change the pH of your soil. I guess it has potassium. Are you deficient in potassium or is your pH very low?