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Zainal Muktamar

Publications (3)

Humic Acid-induced Changes in Soluble Cadmium and Associated Chemical Properties of Entisols and Inceptisols

Zainal Muktamar, Yestisia Sastri Gultom & Yudhi Harini Bertham · Asian Journal of Soil Science and Plant Nutrition · 2025

Aims: The aim of the study was to determine the concentration of soluble Cd and selected chemical properties after the application of humic acid in Inceptisols and Entisols. Study Design: The experiment used a completely randomized design (CRD) with 2 factors. The first factor wa...

Open access Research Article 10.9734/ajsspn/2025/v11i4598

Modification of Synthetic Nitrogen Fertilization Using Goat Manure in Sorghum (Sorghum bicolor L.) Cultivation

Nanik Setyowati, Jessica Putri Utami, Zainal Muktamar, Uswatun Nurjanah, Widodo Widodo & Muhimatul Husna · Asian Research Journal of Agriculture · 2026

Sorghum (Sorghum bicolor L.) is a resilient cereal crop widely cultivated in marginal environments; however, its production often relies heavily on costly synthetic nitrogen fertilizers which also pose environmental concerns. Integrating organic nutrient sources such as goat manu...

Open access Research Article 10.9734/arja/2026/v19i1804

Sphagneticola trilobata Compost as a Sustainable Substitute for Synthetic Nitrogen in Sweet Corn Cultivation

Mario, Nanik Setyowati, Zainal Muktamar, Fahrurrozi, Eko Suprijono & Putri Mian Hairani · Asian Journal of Advances in Agricultural Research · 2025

Sustainable fertilization strategies are essential for improving crop productivity while maintaining soil health. This study evaluated the effects of partial substitution of synthetic nitrogen (N) fertilizer with Sphagneticola trilobata (L.) Pruski compost on soil nitrogen and sw...

Open access Research Article 10.9734/ajaar/2025/v25i11687