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All Journal Journal of Tropical Soils Journal of Tropical Plant Protection Acta Solum
Limin, Atfritedy
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Agriculture, Biological Sciences & Forestry Environmental Science

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Utilizing Coal ash and Lignite Enriched-Compost to Improve Chemical Properties of Ultisols Fajarindo, Fadil; Suwardi, Suwardi; Iskandar, Iskandar; Limin, Atfritedy
JOURNAL OF TROPICAL SOILS Vol. 29 No. 1: January 2024
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2024.v29i1.41-48

Abstract

Continuous monoculture activities can cause soil degradation, leading to low pH, organic matter content, and nutrient deficiencies in Ultisols. Compost has been used to improve soil fertility. Unfortunately, its effectiveness has been limited due to rapid decomposition in the humid tropic area. This study investigated the effect of adding coal ash (fly ash and bottom ash or abbr. as FABA) and lignite to compost on the chemical properties of degraded Ultisols planted with pineapple. The study was conducted at Pineapple plantation in Central Lampung using a split-plot design. The application technique (row or spread) was the main plot and three treatments as subplots were 100% compost (K), 75% compost + 25% FABA (KF), and 70% compost + 20% FABA + 10% lignite (KFL). Each treatment was applied at a dose of 50 Mg ha-1. The results showed that adding FABA and lignite to compost effectively increased the organic carbon, pH, base saturation, exchangeable calcium, -magnesium, -sodium, and zinc, decreasing the aluminum saturation of Ultisols. The application of ameliorants in rows technique was more effective than those of spreading. These findings suggest that FABA and lignite-enriched compost in row application can effectively improve the chemical properties of degraded Ultisols.
Soil Fungus and Bacteria Antagonism Test to Control Phytophthora nicotianae in The In Vitro Istifada, Valia; Syib’li, Muhammad Akhid; Sektiono, Antok Wahyu; Ratdiana, Ratdiana; Limin, Atfritedy
Journal of Tropical Plant Protection Vol. 3 No. 2 (2022)
Publisher : University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtpp.2022.003.2.5

Abstract

This study aims to determine the potential of antagonistic fungi and bacteria as controlling agents for Phytophthora nicotianae. The research was conducted at the Laboratory of Biological Control 1, Department of Plant Pests and Diseases, Faculty of Agriculture, Universitas Brawijaya, Malang. The method used is soil sampling, isolation, purification, identification and in vitro antagonism test. The antagonism test is done by the dual culture method. This study used a completely randomized design for eight treatments, including the control and each treatment was repeated four times. In this study, the antagonism test results were obtained between antagonistic fungi and Phytophthora nicotianae, which Penicillium sp. (PEG01) had the highest percentage of inhibition, and the one with the lowest total diameter was Trichoderma sp. (TRC01). Moreover, the antagonism test results were obtained between antagonistic bacteria and Phytophthora nicotianae, which bacteria C had the highest percentage of inhibition and the lowest total diameter.
Amelioration of Ultisol Acidity Using Coal Ash and Lignite-Enriched Compost Fajarindo, Fadil; Suwardi; Iskandar; Limin, Atfritedy; Dewi, Shiamita Kusuma
Acta Solum Vol. 4 No. 2 (2026): March 2026
Publisher : Department of Soil, Faculty of Agriculture, Lambung Mangkurat University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/actasolum.v4i2.3614

Abstract

Prolonged use of Ultisols can degrade soil quality, notably by increasing acidity. To address this, proper management practices such as adding lime, compost, coal ash, and lignite are essential. This study evaluated the ability of coal ash and lignite-enriched compost to reduce Ultisol’s acidity. A split-plot experiment was conducted with main treatments including compost (K), compost combined with FABA (Fly and bottom ash) (KF), and compost with FABA plus lignite (KFL), all at a rate of 50 tons per hectare. Sub-plot involved different application methods: broadcasting and banding (in crop rows). Results indicated that banded application of KFL raised soil pH to 5.50. Additionally, banded application significantly enhanced cation exchange capacity (CEC) and base saturation (BS) by 11.94 me 100 g⁻¹ and 45.51%, respectively, while decreasing exchangeable Al by 0.208 me 100 g⁻¹ compared to broadcasting.
Co-Authors Dewi, Shiamita Kusuma Fajarindo, Fadil ISKANDAR Iskandar Iskandar Istifada, Valia Ratdiana, Ratdiana Sektiono, Antok Wahyu Suwardi Suwardi Suwardi Syib’li, Muhammad Akhid