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Charloq. Improving High Order Thinking Skills With Republic Polytechnics Singapore Lecturers Through Field Trip Implementation of Biochar On Soil In Pangambatan Village, Merek District, Tanah Karo Regency. JPMPI [Internet]. 24 Mei 2024 [dikutip 22 November 2024];7(2):330-9. Tersedia pada: https://jppipa.unram.ac.id/index.php/jpmpi/article/view/7467