?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.au=Marzena%2C+Emil+Liza&rft.aufirst=Emil+Liza&rft.aulast=Marzena&rft.date=May+2018&rft.title=Perilaku+Petani+dalam+Pemakaian+Pupuk+Anorganik+untuk+Pertanian+di+Nagari+Salimpaung%2C+Kabupaten+Tanah+Datar&rft.inst=Universitas+Negeri+padang&rft.degree=Bachelor%2FSkripsi