土壌学

1. Origins, structure, and basic meaning

• Structure: 土壌学 (どじょうがく) is a noun for soil science, the field that studies soil properties and conditions.
• Basic usage: It names a university field of study or a lecture in which soil from a field is analyzed.
  • 姉は大学で土壌学を学んでいる。 — My older sister studies soil science at university.
  • 土壌学の講義で畑の土を分析した。 — We analyzed soil from a field in the soil science lecture.

2. Common pitfalls and similar expressions

• Soil and field of study
  • 土壌 is soil itself, whereas 土壌学 is the discipline that studies it. A course or research field appears in a pattern such as 土壌学を学ぶ.