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All Journal Plumula : Berkala Ilmiah Agroteknologi Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Asian Journal of Agriculture Acta Solum
Wanti Mindari
Agrotechnology Department, Faculty Of Agriculture, Universitas Pembangunan Nasional Veteran Jawa Timur, Surabaya, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Energy Engineering Immunology & microbiology Materials Science & Nanotechnology

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Humic Silica for Optimising Soil Phosphorus Availability and Phosphorus Uptake by Maize Plants on Industrial Contaminated Lands Diqy Ridwan Aditama; Wanti Mindari; Maroeto Maroeto; M Ghufron Chakim
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 5 (2025): October 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v14i5.1748-1757

Abstract

This study aimed to evaluate the effect of humic-silica application on P availability and P uptake by corn in land contaminated with heavy metals. The experiment was arranged in a Completely Randomized Design (CRD) with two treatment factors. The first factor consisted of three industrial locations: the pharmaceutical industry, the animal feed industry, and the paper industry. The second factor consisted of four levels of humic-silica application (in kg/ha): 0, 10, 20, and 30. Observations were made at the age of 14 and 70 days after planting (DAP). The parameters included soil organic carbon, Cation Exchange Capacity (CEC), soil P-available, and total P uptake by corn plants. Results showed that the humic-silica application at 20 kg/ha had a significant effect on P-available and P uptake by corn plants. This positive effect was consistent in the three industrial locations, both in 14 DAP and 70 DAP observations. These findings indicate that the use of humic-silica at 20 kg/ha has potential to reduce the negative impacts of heavy metal pollution on the availability of plant nutrients in industrial lands. This study provides insight into strategies for managing industrially contaminated lands to increase agricultural productivity, especially in terms of increasing the availability and absorption of phosphorus by corn plants.
Mitigating Heavy Metal Contamination in Agricultural Soils with Biosilica-Humic Acid as Soil Amendment Strategies in Industrial Peripheries M Ghufron Chakim; Wanti Mindari; Purnomo Edi Sasongko
Acta Solum Vol. 3 No. 3 (2025): Juli 2025
Publisher : Department of Soil, Faculty of Agriculture, Lambung Mangkurat University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/actasolum.v3i3.3367

Abstract

Soil contamination by heavy metals poses a significant threat to sustainable agriculture, especially in areas adjacent to industrial zones. This study demonstrates that while the initial application of the biosilica-humic acid (BSi-HA) soil amendment did not result in statistically significant changes in soil chemical properties within the first 7 days of incubation, prolonged incubation for 60 days revealed meaningful effects, particularly in reducing heavy metal availability in soil. Significant decreases in iron (Fe) and lead (Pb) concentrations were observed over time, with Fe reductions ranging from 45–67% and Pb reductions between 8–40%. These results are attributed to the synergistic effect of functional groups in BSi-HA—especially the carboxyl (–COOH) and hydroxyl (–OH) groups in humic acid—which exhibit high metal-binding affinity under acidic conditions (pH ~5). Although soil fertility parameters such as C-organic content and cation exchange capacity (CEC) showed a declining trend due to microbial activity during incubation, the ability of BSi-HA to immobilize heavy metals without exceeding safe thresholds highlights its potential as a sustainable soil amendment. Moreover, previous findings indicating reductions of up to 90% for Pb and 76% for Cd in plant tissues further support the efficacy of BSi-HA in mitigating heavy metal contamination in agricultural soils near industrial zones. Further long-term studies are recommended to evaluate BSi-HA's remediation capacity, persistence, and impact on crop yield and food safety. Combining biosilica and humic acid offers a promising, eco-friendly approach for managing heavy metal contamination in soils.
Soil fertility dynamics under varying land use systems in Jatiarjo Village, Prigen Sub-district, Pasuruan, Indonesia PURNOMO EDI SASONGKO; WANTI MINDARI; MUHAMMAD RIZKY ROMADHON; HAMMADA HIDAYATURRACHMAN
Asian Journal of Agriculture Vol. 10 No. 2 (2026)
Publisher : Smujo International

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/asianjagric/g100201

Abstract

Abstract. Sasongko PE, Mindari W, Romadhon MR, Hidayaturrachman H. 2026. Soil fertility dynamics under varying land use systems in Jatiarjo Village, Prigen Sub-district, Pasuruan, Indonesia. Asian J Agric 10 (2): g100201. https://doi.org/10.13057/asianjagric/g100201. Variations in land use, geographical conditions, and land management practices highly influence soil fertility. This study evaluated the soil fertility status of three dominant land-use systems-mixed garden, shrubland, and moorland in Jatiarjo Village, Prigen Sub-district, Pasuruan District, East Java, Indonesia. Three land use units, including mixed garden, shrubland, and moorland, were assessed using the Soil Fertility Index (SFI). Soil sampling was a random sampling method at a 0-20 cm depth, with 7 points in each land unit. Soil samples were analyzed for soil. Chemical characteristics included pH, organic carbon (C), total nitrogen (N), available phosphorus (P), exchangeable potassium (K), Cation Exchange Capacity (CEC), Base Saturation (BS), Aluminum Saturation (AS), and soil texture. Minimum Soil Fertility Indicators (MSFI) were identified using Pearson correlation and Principal Component Analysis (PCA), and the Soil Fertility Index (SFI) was calculated accordingly. Soil pH ranged from 5.15-6.44, organic C from 2.20-11.60%, total N from 0.12-1.06%, available P from 0.60-18.54 ppm, and exchangeable K from 0.09-0.15 μg/100 g. CEC was 24.44-43.97 me/100 g, while BS remained very low (5.31-10.01%). SFI indicated medium fertility across all land uses, averaging 0.62 in mixed gardens, 0.61 in shrublands, and 0.58 in moorlands. Higher SFI in mixed gardens reflected greater organic matter inputs, whereas lower fertility in moorlands was linked to minimal organic inputs and more intensive cultivation. This study highlights the significance of organic matter application and land conservation practices in sustaining and enhancing soil fertility, and also provides a scientific basis for targeted land management to sustain soil productivity in upland agroecosystems.
Pengaruh Variasi Ketinggian Raised Bed terhadap Perubahan Sifat Fisik dan Kimia Tanah di Jemur Wonosari, Surabaya Chosa Zahro Fatiha; Wanti Mindari; Purnomo Edi Sasongko; Rahayu Anggraini; Fifi Aurafika Dewi; Iqbal Satria Pradana
Plumula : Berkala Ilmiah Agroteknologi Vol. 14 No. 1: Januari 2026
Publisher : Program Studi Agroteknologi, Fakultas Pertanian, UPN "Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/plumula.v14i1.275

Abstract

Sistem tanam raised bed beralaskan limbah organik diduga berdampak terhadap kecukupan air, nutrisi, dan gas-gas tanah. Tujuan penelitian untuk mengkaji pengaruh variasi ketinggian raised bed terhadap perubahan sifat fisik dan kimia tanah terpilih. Penelitian dilaksanakan pada bulan Juni hingga Agustus 2025 di Jemur Wonosari, Surabaya. Rancangan Acak Kelompok digunakan untuk mengevaluasi  perlakuan  ketinggian raised bed : 20 cm (P1), 25 cm (P2), dan 30 cm (P3), masing-masing diulang tiga kali. Sampel tanah diambil pada kedalaman 0-20 cm pada setiap raised bed untuk dianalisis nilai pH tanah, EC, dan C-organik tanah. Hasil penelitian menunjukkan bahwa ketinggian raised bed mempengaruhi nilai ciri tanah tersebut. Nilai pH tanah berada pada kisaran 7,08–7,63, nilai EC tanah antara 0,594 dS/m dan 0,402 dS/m, dan kandungan C organik antara 1,09% dan 0,6%. Kandungan C organik berbanding terbalik dengan EC tanah. Bedengan yang ditinggikan optimal pada ketinggian 25 cm karena dapat menjaga kelembapan, aerasi, dan mendukung dekomposisi bahan organik yang baik.
Co-Authors Chosa Zahro Fatiha Diqy Ridwan Aditama Fifi Aurafika Dewi HAMMADA HIDAYATURRACHMAN Iqbal Satria Pradana M Ghufron Chakim M. Ghufron Chakim Maroeto Maroeto MUHAMMAD RIZKY ROMADHON PURNOMO EDI SASONGKO Purnomo Edi Sasongko Purnomo Edi Sasongko Rahayu Anggraini