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Jurnal Solum
Published by Universitas Andalas
ISSN : 18297994     EISSN : 02560835     DOI : https://doi.org/10.2057/jsolum
Core Subject : Agriculture, Social,
Agriculture, Biological Sciences & Forestry Environmental Science
Focuses and scopes of Jurnal Solum is to publishes all aspects in the original research of soil science or review covering: Soil physic and soil conservation, Soil mineralogy, Soil chemistry and soil fertility, Soil biology and soil biochemical, Soil genesis and classification, Land survey and land evaluation, Land development and management environmental.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Tanah
Articles 173 Documents
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PENDUGAAN EROSI TANAH PADA BERBAGAI PENGGUNAAN LAHAN DAN KEMIRINGAN LERENG DI KECAMATAN WONOSALAM, KABUPATEN JOMBANG Charismanda, Muhammad Luthfi
Jurnal Solum Vol. 21 No. 1 (2024)
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jsolum.21.1.1-13.2024

Abstract

Indonesia is a tropical country prone to land degradation, with erosion being one of the main causes. The damage and loss of hydrological and economic functions are consequences of erosion. Wonosalam Subdistrict, Jombang Regency, is an area located at the foot of Mt. Anjasmoro, ranging in elevation from 600 to 1200 meters above sea level (masl). Wonosalam Subdistrict excels in the plantation sector, particularly in Jombang Regency. The area's characteristics, marked by steep slopes and numerous dragon's back ridges, make it highly susceptible to erosion. Consequently, if land management does not adhere to soil and water conservation principles, a decline in soil function will adversely impact the key sector of plantations. This study employed a descriptive-exploratory method through field surveys and purposive sampling. Samples were taken at various slope levels, including gentle slopes (8-15%), moderately steep slopes (16-25%), and steep slopes (26-40%), across forest, plantation, dryland cultivation, and paddy fields. Erosion estimation utilized the Universal Soil Loss Equation (USLE) proposed by Wichsmeier and Smith (1978). The research findings indicate that the Land Unit with the highest actual erosion value is dryland cultivation with a slope of 25-40% or T1K3, with a value of 1238.44 tons/ha/year. In contrast, the lowest is Paddy Field 3 with a slope of 8-15% or Sw1K3 with a value of 0.16 tons/ha/year. Conservation guidelines are determined based on the Erosion Index (EI), prioritizing the scale to identify the lands that require immediate restoration. All dryland fall under Priority I in the conservation plan. Conservation directives involve both vegetative and mechanical methods, such as constructing bench terraces and planting crops suitable for the socio-economic conditions of the Wonosalam Subdistrict, such as coffee or durian.
Evaluation of the Fertility Status of Rice Fields in Giri Jaya Village, Nagrak District, Sukabumi Regency Rahmayuni, Erlina
Jurnal Solum Vol. 21 No. 1 (2024)
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jsolum.21.1.22-29.2024

Abstract

Rice field management plays a crucial role in successfully increasing rice production. This research aims to assess the fertility status of rice fields situated at varying altitudes in Giri Village, Nagrak District, Sukabumi Regency. The research comprises three stages, which include: Field research, Laboratory research, encompassing the analysis of soil chemical properties. Data analysis, conducted both descriptively and quantitatively. Composite soil samples from rice fields were collected at three different elevations (top, middle, and bottom) at a depth of 1-20 cm in the surface layer of the rice field soil. Analysis of paddy soil samples involved measuring pH H2O using the electrometric method, total N, and cation exchange capacity (CEC) using the titrimetric method, potential K2O using the flame photometric method, potential P2O5 and organic C using the spectrophotometric method, K-dd and Na-dd using the flame photometric method, and Ca-dd and Mg-dd using the AAS method. Data obtained from soil analysis at different elevations were compared based on soil type for each observed parameter. The research results indicate that the evaluation of nutrient status is influenced by altitude. Land situated at lower elevations exhibits better soil fertility status, followed by land at the upper and middle elevations. Keywords: Altitude, Andisols, Erosion, Rice fields, Soil fertility.
DINAMIKA pH TANAH BERPIRIT AKIBAT PERUBAHAN KONDISI AIR DAN APLIKASI AMELIORAN Marsi, Marsi
Jurnal Solum Vol. 21 No. 1 (2024)
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jsolum.21.1.30-42.2024

Abstract

Naturally, during dry season, pyrite tent to be oxidized due to soil water content and groundwater level decrease. This paper aims to evaluate the influence of soil water condition and ameliorants on pyritic soil pH dynamics. Pyritic soil was taken from a depth of 70-90 cm below soil surface in the acid sulphate land located at Mulyasari Village, Tanjung Lago District, Banyuasin Regency, South Sumatra. The research was carried out in greenhouse with 2 treatment factors, namely: Water condition (K1 = water condition maintained at 5 cm above soil surface during incubation period and K2 = water condition at 5 cm above soil surface and allowed to decrease during incubation period) and ameliorant (T = Without Ameliorant, B = Organic Matter, D = Dolomite, P = Phosphate Fertilizer and S = Silicate Coal Ash). The results showed that pyritic soil pH tended to be stable during incubation period for K1 treatment, and pH of soil treated with dolomite > Silicate Coal Ash > Organic Matter > P Fertilizer > Without Ameliorant. Meanwhile for K2 treatment, soil pH tended to decrease with the highest rates are 21.58x10-2, 19.33x10-2, 4.38x10-2, 7.50x10-2, and 12.07x10-2 pH unit per day, respectively for without ameliorant, organic matter, dolomite, phosphate fertilizer and silicate coal ash. The highest rate of decrease in pH of pyritic soil occurred in the range of decreasing water content from 66.31 to 41.73% for without ameliorant, organic matter and phosphate fertilizer, from 41.73 to 13.93% for silicate coal ash, and from 13 .93 to 8.22 % for dolomite. These findings can be applied for managing pyritic soil by maintaining soil water content from falling under water content critical limit range and under uncontrolled dry conditions it is recommended to use lime to minimize pyrite oxidation.

Page 18 of 18 | Total Record : 173

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