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All Journal Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) AGROLOGIA: Jurnal Budidaya Tanaman
Rini Suryani
Universitas Panca Bhakti
Agriculture, Biological Sciences & Forestry Engineering

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Aplikasi Arang Kompos Bioaktif Berbasis Limbah Kelapa dan Lama Inkubasi untuk Meningkatkan Pertumbuhan Tanaman Kedelai pada Tanah Ultisol Rini Suryani; Setiawan Setiawan; Ismail Astar
AGROLOGIA: Jurnal Ilmu Budidaya Tanaman Vol 14 No 2 (2025): Agrologia : Jurnal Ilmu Budidaya Tanaman
Publisher : Fakultas Pertanian, Universitas Pattimura Ambon, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/agrologia.v14i2.21814

Abstract

The use of Ultisol soil for agriculture has problems, namely low soil organic matter and acidity. This can be overcome by adding organic matter to the soil to act as an ameliorant. The ameliorant can be applied by utilizing coconut waste that has been processed into bioactive compost charcoal. Bioactive compost charcoal is a mixture of charcoal (biochar) and compost composted using Trichoderma harzianum. This study aims to determine the effect of bioactive compost charcoal and incubation period on soybean growth in Ultisol soil. This study used a completely randomized design (CRD) factorial pattern, consisting of two treatment factors. The first factor was bioactive compost charcoal with 4 levels (0; 5; 10; 15 tons ha⁻¹) and the second factor was incubation period with 3 levels (0; 2; 4 weeks). Each treatment was repeated 3 times, consisting of 3 plants, for a total of 108 plants. The results of this study showed that a dose of 15 tons ha⁻¹ of bioactive compost charcoal significantly increased plant height (46,05 cm), number of leaves (55,19 leaves), root volume (7,44 cm³), and plant dry weight (14,40 g), while a dose of 10 tons ha⁻¹ resulted in the highest number of soybean branches (5,37 branches) in Ultisol soil.
Improving Alluvial Soil Properties and Edamame (Glycine max L. Merr.) Growth Using Compost–Biochar Agusalim Masulili; Rini Suryani; Sutikarini Sutikarini
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 15 No. 2 (2026): April 2026
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v15i2.852-859

Abstract

Edamame cultivation on alluvial soils in West Kalimantan faces persistent challenges related to poor soil quality, including low organic matter content, compacted structure, and limited nutrient retention capacity. This study evaluated the effectiveness of compost-biochar amendment to enhance soil properties and edamame growth on alluvial soil. A completely randomized design with 13 treatments in triplicates was employed, combining compost biochar doses (5, 10, and 15 ton/ha) with varying NPK fertilizer reduction levels (0%, 25%, 50%, and 75%). Compost consisted of water hyacinth compost and rice husk biochar mixed at 1:1 ratio (v/v), applied one week before planting. Results demonstrated significant improvements in both vegetative growth and soil chemical properties (p<0.05). The treatment combining 15 ton/ha compost with 25% NPK (C12) produced the highest number of branches (7.67) and trifoliate leaves (25.50), representing increases of 109% and 63% respectively over the control. Application of 10 ton/ha compost with 50% NPK reduction (C8) optimally enhanced soil organic carbon to 1.90% and water retention to 37.61%, demonstrating 46% and 7.2% improvements over untreated soil. These findings indicate that compost–biochar amendment can substantially improve soil quality while maintaining edamame growth under reduced NPK input. A reduction of up to 50% of NPK fertilizer is achievable without compromising soil improvement and plant performance, highlighting the potential of this approach for sustainable edamame production on alluvial soils.
Co-Authors Ismail Astar Masulili, Agusalim Mulyadi Setiawan Sutikarini