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Situmeang, Yohanes Parlindungan (2019) [Artikel prosiding dengan cover] Application of biochar and compost to changes in physical and chemical properties of soil and corn yield on dry land. -.
Situmeang, Yohanes Parlindungan (2019) [Artikel prosiding dengan cover] The effects of compost and biochar on the growth and yield of red chili plants. -.