agricultural zone; area zoned for farming
A legal/administrative term used in Japanese land-use planning, referring to an area designated for agricultural purposes under the Agricultural Land Act.
Because this area is designated as an agricultural zone, construction of houses is restricted.
農業地域 is a broader term for an agricultural region, while 農用地区域 specifically refers to a legally designated zone for agricultural use.
Compound of 農業 (agriculture) + 用地 (land for a specific use) + 区域 (zone/area). The term is a modern legal coinage.