Amend Garden Soil. It is best to amend soil close to planting time. Elemental sulfur can help make soil more acidic.
Application rates of garden soil amendments depend on the general health and structure of your soil as well as the selected amendment. It is best to use these manures after they have composted for at least six to nine months minimum. You can add other things if you want or need--for instance sand for clay type soils etc.
Thus you will make a simple layer of compost around three and six inches deep.
You can use tilling a traditional. Good garden soil has a PH of 6-65. For those re-amending a plot or raised bed you do not need to move the dirt. Simply spread the missing ingredients on top of the area.