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Rinto Manurung
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Jl. Jendral Ahmad Yani Pontianak. Telp. (0561) 740191 Fax (0561) 740191
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INDONESIA
Jurnal Ilmu Tanah dan Sumber Daya Lahan
Published by Universitas Tanjungpura
ISSN : 2443101X     EISSN : 25799800     DOI : https://10.26418/pedontropika
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Research and study in soil science and other fields related, include : Soil physics and conservation Soil chemistry and fertility, Soil biology and biotechnology Clay mineralogy Plant nutrient Pedogenesis Geology and Mineralogy Soil survey and classification Soil reclamation and remediation Soil and Water Quality
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Tanah
Articles 74 Documents
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Evaluasi Status Kesuburan Tanah Entisol pada Beberapa Umur Tanaman Kelapa Sawit (Elaeis guineensis Jacq) di Desa Sungai Ambangah Kabupaten Kubu Raya Batubara, Yuli Shinta Natalia; Manurung, Rinto; Hazriani, Rini
Pedontropika: Jurnal Ilmu Tanah dan Sumber Daya Lahan Vol 12, No 1 (2026): Februari
Publisher : Soil Science Department, Faculty of Agriculture, Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/pedontropika.v12i1.105107

Abstract

Entisols have considerable potential for plantation development, including oil palm (Elaeis guineensis Jacq), a strategic commodity in Indonesia’s economy. In Sungai Ambangah Village, oil palm cultivation constitutes a primary livelihood activity. This study aimed to assess soil fertility status under different ages of oil palm plantations established on Entisols. The research was conducted in Sungai Ambangah Village, Sungai Raya Subdistrict, Kubu Raya Regency, West Kalimantan, Indonesia. Soil sampling was performed using a zig-zag pattern within the palm circle area. Each observation point consisted of five subsamples composited into a single sample, resulting in a total of twelve composite samples collected from three land units. Soil samples were analyzed at the Laboratory of Soil Chemical Properties and Fertility, Faculty of Agriculture, Universitas Tanjungpura. Analytical results were classified according to the soil chemical property criteria established by the Soil Research Center (1983), and soil fertility status was evaluated based on the guidelines of the Soil Research Center, Bogor (1995). The results indicated that organic C, available P, and total K contents were relatively high. However, overall soil fertility remained constrained due to very acidic soil pH, very low base saturation, and limited availability of exchangeable base cations (Ca, Mg, K, and Na). Fertility evaluation revealed that the soils were classified as low fertility status, with very low base saturation identified as the primary limiting factor associated with strongly acidic soil conditions.
Karakteristik Sifat Kimia Tanah Ultisol pada Tanaman Karet di Desa Kersik Belantian Kecamatan Jelimpo Kabupaten Landak Goreti, Valentina; Nusantara, Rossie Wiedya; Manurung, Rinto
Pedontropika: Jurnal Ilmu Tanah dan Sumber Daya Lahan Vol 12, No 1 (2026): Februari
Publisher : Soil Science Department, Faculty of Agriculture, Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/pedontropika.v12i1.99513

Abstract

Rubber is one of the agricultural commodities that plays a very important role, both as a source of income, employment opportunities, and a source of foreign exchange for the country. Rubber plants have a very high economic value, this annual plant can be tapped for its rubber sap for the first time at the age of 5 years, land for growing rubber plants generally pays more attention to physical properties than chemical properties. This study aims to determine the characteristics of the chemical properties of ultisol soil in rubber plants in the village of Kersik Belantian, Jelimpo District, Landak Regency. Determination of observation points was carried out using the diagonal method, determination of coordinate points using the Global Positioning System (GPS). The results showed that the pH of the superior rubber soil was 4.78 (acidic) and local rubber 4.90 (acidic). Organic carbon of superior rubber soil was 3.78% (high) and local rubber 0.20% (very low). Total nitrogen of superior rubber soil was 0.35% (moderate) and local rubber 0.44% (moderate). Available phosphorus in superior rubber soil is 15.23 ppm (low) and local rubber is 11.23 ppm (low). Potassium-dd in superior rubber soil is 0.12 cmol (+)kg-1 (very low) and local rubber is 0.14 cmol(+)kg-1 (very low). Cation exchange capacity of superior rubber is 16.49 cmol (+)kg-1 (low) and local rubber is 12.80 cmol(+)kg-1 (low). Base saturation of superior rubber is 4.24% (very low) and local rubber is 5.16% (very low). Al-dd in superior rubber is 0.98% (low) and local rubber is 0.89% (very low). Keyword: Chemical Properties, Ultisol Soil, Rubber, Soil Characteristics
Evaluasi Kesesuaian Lahan untuk Tanaman Kelapa Sawit dengan Tanaman Tumpang Sari Kacang Kedalai di Desa Engkadu Kecamatan Ngabang Kabupaten Landak Ponda, Ponda; Hazriani, Rini; Agustine, Leony
Pedontropika: Jurnal Ilmu Tanah dan Sumber Daya Lahan Vol 12, No 1 (2026): Februari
Publisher : Soil Science Department, Faculty of Agriculture, Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/pedontropika.v12i1.105721

Abstract

Land is a limited natural resource, so its utilization needs to be planned optimally and sustainably. The decline in oil palm productivity and the increasing demand for food encourage the need for alternative land use through intercropping systems with food crops, one of which is soybeans. This study aims to evaluate the actual and potential land suitability for oil palm and soybean crops in an intercropping system in Engkadu Village, Ngabang District, Landak Regency. The research methods include field surveys, soil sampling and analysis, slope class determination, and land suitability mapping using the FAO (1976) approach and the BBSDLP Technical Guidelines (2011). Evaluation was carried out on physical and chemical parameters of the soil which were then compared with the land suitability criteria for both commodities. The results show that the actual land suitability classification at SL 1 and 2 for oil palm crops is classified as a class within the subclass S2-na, nr, wa. The actual land suitability classification at SL 1 and 2 for soybean crops is classified as a subclass within N-wa. Improvement efforts can be carried out by providing organic materials, liming, fertilizing, making drainage channels, making terraces, planting ground cover plants, recommending the use of oil palm land and replanting oil palm plants that are more than 20 years old.
Pengaruh Pemberian Fly Ash dan Biochar Sekam Padi terhadap Ketersediaan N, P, K dan Pertumbuhan Terung Ungu (Solanum melongena L.) pada Tanah Alluvial
Pedontropika: Jurnal Ilmu Tanah dan Sumber Daya Lahan Vol 12, No 1 (2026): Februari
Publisher : Soil Science Department, Faculty of Agriculture, Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/pedontropika.v12i1.105856

Abstract

Alluvial soils in West Kalimantan have low levels of macronutrients, particularly phosphorus (P) and potassium (K), which hinder the growth of purple eggplant. To improve the chemical properties of these soils, fly ash and rice husk biochar were used as soil amendments, with the aim of increasing soil pH, organic carbon, total nitrogen, available phosphorus, and soluble potassium, as well as promoting plant growth. The study aimed to determine the role and optimal application rates of fly ash and rice husk biochar on the availability of N, P, and K nutrients and the growth of purple eggplant in alluvial soil. The study was designed using a factorial Complete Randomized Design (CRD) with 9 treatment combinations and 3 replications, consisting of Fly Ash (0, 1000, 1500 g/polybag) and rice husk biochar (0, 525, 1000 g/polybag). Analysis of variance results showed that fly ash had a significant effect on soil pH and available phosphorus, which played a role in reducing soil acidity and increasing phosphorus availability in alluvial soil. Fly ash did not have a significant effect on organic carbon, total nitrogen, soluble potassium, and plant height. Result show biochar also had no significant effect on any of the soil chemical parameters or plant height, and there was no interaction between the two soil amendments. The A1B2 treatment combination (0 g of fly ash per polybag and 525 g of biochar per polybag) was the optimal treatment, showing the greatest improvement in soil chemical parameters and plant height, indicating that biochar at a moderate dose is more effective at improving soil chemical properties and supporting the growth of purple eggplant under conditions without fly ash.

Page 8 of 8 | Total Record : 74

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