Nōgyō Kankyō Gijutsu Kenkyūjo shiryō.
Nōrin Suisanshō Nōgyō Kankyō Gijutsu Kenkyūjo (Japan)
Ibaraki-ken Tsukuba-shi : Nōrinshō Nōgyō Kankyō Gijutsu Kenkyūjo,
Description based on: Dai 3-gō; title from cover.
Agricultural ecology
Agriculture