Afrizal, Roni, State Polytechnic Payakumbuh for Agriculture (Politeknik Pertanian Negeri Payakumbuh), Indonesia 26271,, Indonesia

• Vol 21, No 1: January 2016 - Articles
  Geochemical Investigation of Selected Elements in an Agricultural Soil: Case Study in Sumani Watershed West Sumatera in Indonesia
  Abstract  PDF

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