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All Journal AMPLITUDO: Journal of Science & Technology Innovation
Matsun Matsun
PGRI Pontianak University
Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture

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Developing an IoT-Based Smart Soil Analyzer to Support Sustainable Agriculture and Contextual STEM Learning in Organic Chemistry Yulia Dewi Puspitasari; Matsun Matsun; Hendrik Pratama; Wahyu Saputra; Tri Wahyuni Maduretno; Muhammad Shohibul Ihsan; Zaqueu António Freitas
AMPLITUDO : Journal of Science and Technology Innovation Vol. 5 No. 2 (2026): August
Publisher : Balai Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56566/amplitudo.v5i2.550

Abstract

Organic chemistry is often taught in abstract concepts, especially on topics related to soil organic matter, nutrient transformation, and the nitrogen cycle. This study aims to develop and validate an IoT-supported Smart Soil Analysis to support contextual STEM-based learning in organic chemistry. This research uses a Research and Development approach with a 4D model, limited to the defining, designing, and developing stages. The prototype was revised based on feedback from six subject matter experts, six media experts, and six evaluation experts prior to limited testing. Validity was measured using the Content Validity Index (CVI), resulting in average CVI scores of 0.88 (content), 0.91 (media), and 0.90 (evaluation), indicating high validity. A limited trial involving nine science education students showed an overall practicality score of 3.6 out of 4.0. This device integrates real-time measurements of soil pH, nitrogen (N), phosphorus (P), potassium (K), and electrical conductivity, allowing students to analyze organic matter decomposition, nutrient availability, and fertilization recommendations within a project-based STEM framework. The research results show that the Smart Soil Analyzer is a valid and practical learning medium that effectively connects organic chemistry concepts with real-world agricultural contexts.
Co-Authors Hendrik Pratama Muhammad Shohibul Ihsan Tri Wahyuni Maduretno Wahyu Saputra Yulia Dewi Puspitasari Zaqueu António Freitas