Abbreviation of 農業高校 or 農業高等学校. Used in casual and educational contexts.
See also: 農業高校 (のうぎょうこうこう) · 農業高等学校 (のうぎょうこうとうがっこう)
He studied dairy farming at an agricultural high school.
The local agricultural high school has a strong practical training program.
Abbreviation formed from the first characters of 農業 (agriculture) and 高校 (high school).