The Constitutional Topics pages at the USConstitution.net site are presented to delve deeper into topics than can be provided on the Glossary Page or in the FAQ pages. This Topic Page concerns Presidential Pardons. Pardons are mentioned in the Constitution at Article 2, Section 2.
Peat is a type of organic mulch that is commonly used for the triune purpose of fertilizing, retaining moisture, and prohibiting weed growth in a flower bed or garden. It can be laid down on top of the bed or mixed into the soil. It can also be used in potted plants.
Peat is partially decomposed organic material. If you examine peat, you can find bits and pieces of leaf and stem material, but it's basically pretty well composted. One of the commonly sold peats is Sphagnum peat, partially decomposed Sphagnum. But there are a lot of other peats, depending on starting material.