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All Journal Journal of Tropical Soils ZIRAA'AH MAJALAH ILMIAH PERTANIAN
Devita, Windi Bunga
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Agriculture, Biological Sciences & Forestry Environmental Science

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The Isothermal Phosphate Adsorption in a New Tidal Rice Field of Barito Kuala Regency South Kalimantan: A Study on Phosphorus Adsorption in Acid Sulfate Soils for Agricultural Improvement Yusran, Fadly Hairannoor; Mariana, Zuraida Titin; Devita, Windi Bunga
JOURNAL OF TROPICAL SOILS Vol 30, No 1: January 2025
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2025.v30i1.9-16

Abstract

High P adsorption reduces rice production, especially in newly reclaimed paddy fields. The research studied soil P adsorption using the adsorption isoterm equation and soil P solubility in a New Tidal Rice Field of Barito Kuala Regency. This incubation study used soil samples from Ray 7, Balandean Village, Alalak District, Barito Kuala Regency, South Kalimantan Province, from May to November 2022. The isothermal adsorption of P was measured in six soil samples with three replicates. P (0, 2, 5, 10, 15, 30, and 50 mg P kg-1) from KH2PO4 were added in 1 g soil in 25 mL 0.01 M CaCl2. The suspensions were shaken at 25 ! for 17 hours, then centrifuged at 3000 rpm for five minutes, and the supernatant was filtered (Whatman 42) for P analysis. Three ordinary adsorption isotherm equations, Langmuir, Freundlich, and Brunauer-Emmett-Teller (BET), were used to fit the data. After adding 50 mg P kg-1, the average dissolved-P was 34.60 mg kg-1 (69%), and adsorbed-P was 15.40 mg kg-1 (31%). The BET equation was more suitable for describing P adsorption isotherm in this type of soil, which has the ability to adsorb one-third of any P addition.
The Isothermal Phosphate Adsorption in a New Tidal Rice Field of Barito Kuala Regency South Kalimantan: A Study on Phosphorus Adsorption in Acid Sulfate Soils for Agricultural Improvement Yusran, Fadly Hairannoor; Mariana, Zuraida Titin; Devita, Windi Bunga
JOURNAL OF TROPICAL SOILS Vol. 30 No. 1: January 2025
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2025.v30i1.9-16

Abstract

High P adsorption reduces rice production, especially in newly reclaimed paddy fields. The research studied soil P adsorption using the adsorption isoterm equation and soil P solubility in a New Tidal Rice Field of Barito Kuala Regency. This incubation study used soil samples from Ray 7, Balandean Village, Alalak District, Barito Kuala Regency, South Kalimantan Province, from May to November 2022. The isothermal adsorption of P was measured in six soil samples with three replicates. P (0, 2, 5, 10, 15, 30, and 50 mg P kg-1) from KH2PO4 were added in 1 g soil in 25 mL 0.01 M CaCl2. The suspensions were shaken at 25 ! for 17 hours, then centrifuged at 3000 rpm for five minutes, and the supernatant was filtered (Whatman 42) for P analysis. Three ordinary adsorption isotherm equations, Langmuir, Freundlich, and Brunauer-Emmett-Teller (BET), were used to fit the data. After adding 50 mg P kg-1, the average dissolved-P was 34.60 mg kg-1 (69%), and adsorbed-P was 15.40 mg kg-1 (31%). The BET equation was more suitable for describing P adsorption isotherm in this type of soil, which has the ability to adsorb one-third of any P addition.
STRATEGI PENGEMBANGAN USAHATANI JAGUNG DI KABUPATEN TANAH LAUT, PROVINSI KALIMANTAN SELATAN Kobesi, Petrus Suse; Firmansyah, Hairi; Devita, Windi Bunga; Matoneng, Ody Wolfrit; Sarifuddin, Andri
ZIRAA'AH MAJALAH ILMIAH PERTANIAN Vol 51, No 2 (2026)
Publisher : Pusat Publikasi Jurnal Universitas Islam Kalimantan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31602/zmip.v51i2.22922

Abstract

The food sector plays a strategic role in agricultural development and overall national development. Demand for food continues to increase along with population growth and increasing per capita income. This study aims to identify strategies for developing corn farming in Tanah Laut Regency. The method used by the researcher is a SWOT analysis, and strategy priority determination is carried out using QSPM analysis. The results of the analysis found six main strategies, including: 1) Increasing farmers' understanding of good corn cultivation techniques, including pest and disease control, thereby minimizing the risk of crop failure. 2) Strengthening farmer group institutions for more effective coordination between related institutions. 3) Optimizing farmer resources to increase production while meeting industrial market needs. 4) Maximizing government support to maintain production continuity. 5) Optimizing corn productivity with high quality (grade) as an effort to deal with price fluctuations in the market. 6) Expanding farmers' access to financing sources or agricultural capital to support the application of appropriate technology.
Co-Authors Fadly Hairannoor Yusran Hairi Firmansyah Kobesi, Petrus Suse Matoneng, Ody Wolfrit Sarifuddin, Andri - Zuraida Titin Mariana