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https://isroi.com/2013/11/01/peraturan-menteri-pertanian-nomor-70permentansr-140102011-tentang-pupuk-organik-pupuk-hayati-dan-pembenah-tanah/
PERATURAN MENTERI PERTANIAN NOMOR : 70/Permentan/SR.140/10/2011 TENTANG PUPUK ORGANIK, PUPUK HAYATI DAN PEMBENAH TANAH