壌 is built from the 土 and 襄 (assist (in 譲·壌)) components.
It belongs to a phonetic family with 譲, 醸, and 嬢 — they share the 襄 component and the reading ジョウ.
A common word using 壌 is 平壌 (ピョンヤン), meaning “Pyongyang (North Korea)”.
Kanji that look similar include 壁, 壇, 壊, and 墜.