Report - PUPUK DALAM PENINGKATAN PRODUKSI TANAMANsugeng.lecture.ub.ac.id/files/2012/09/6.-Pemupukan.pdf · Ppm Fe 51-350 50-300 21-250 Ppm Zn 21-50 20-50 20-70. Dasar Perhitungan Kebutuhan

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