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    • Pengelolaan Hara Padi pada Tanah Sawah demi Peningkatan Efisiensi Pupuk 

      Pujiastuti, Elisabeth (Universitas Katolik Santo Thomas Sumatera Utara, 2006-09)
      The problem in soil fertilizing today is the low fertilizer efficiency. The attempt to raise the fertilizer efficiency is done especially by improving the agronomical techniques, as in the agronomy of paddy rice. Fertilizer ...