Soil amendments you choose mix into the existing soil and address the type of problems you are experiencing in the yard, according to the University of Colorado. Gardeners with clay or compacted soils must improve their soil’s draining abilities. In addition, if you soil’s pH range is out of the range of the type of grass or ornamental plants you are trying to grow, correct the problem with amendments.
Work the compost into the soil with your tiller. To make it easier, choose a dry day to amend your soil because water causes soil compaction.
Spread pelletized limestone over the soil to improve soil that is too acidic. The amount of lime you spread depends on how much higher you need to raise your pH range. However, the University of Ohio discourages applying more than 50 pounds of pelletized limestone per 1,000 square feet at one time. Water the lawn area after applying the limestone.