Octavianus, Augustus
(Balai Pengkajian Teknologi Pertanian (BPTP) Balitbangtan Riau, Badan Penelitian dan Pengembangan Pertanian, Kementerian Pertania, 2007-12-02)
The Effisiency of Phosporus Fertilizer Applied to Several Soybean
(Glycine max L Merril) Varieties. Oktavianus Augustus dan Rachmi
wati Yusuf. Most of soils in Riau Province have the problem on phosphorus availability. ...