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Jurnal Ilmu Tanah dan Lingkungan (Journal of Soil Science and Environment)

jtanah
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Published by Institut Pertanian Bogor

ISSN : 14107333 EISSN : 25492853 DOI : -

Core Subject : Agriculture, Social,

Agriculture, Biological Sciences & Forestry Environmental Science

Jurnal Ilmu Tanah dan Lingkungan merupakan media yang menyajikan artikel mengenai hasil penelitian dan telaah perkembangan mutakhir dalam bidang ilmu tanah, air, dan ilmu lingkungan sebagai bahan kajian utama.

Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Tanah

Articles 301 Documents

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PEMETAAN BAHAYA LONGSORAN BERDASARKAN KLASIFIKASI STATISTIK PEUBAH TUNGGAL MENGGUNAKAN SIG: STUDI KASUS DAERAH CIAWI-PUNCAK-PACET, JAWA-BARAT Baba Barus
Jurnal Ilmu Tanah dan Lingkungan Vol 2 No 1 (1999): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Regarding environmental degradation in Puncak and its surrounding area due to the rapid landuse changes during 1981-1994, some mitigation schemes for soil erosion have been implemented but landslides. Data on landslide and its causative factors (landuse, soil, geology, slope, climate, and terrain mapping unit) and their relationships in the area are still not available. The objective of this research is to develop the method and procedures to map landslide hazards by using GIS (Geographical Information System) univariate-statistical analysis applied to the area as a case study. For this purpose, three methods to classify and to map landslide hazards were evaluated. They were respectively developed by considering: (a) unweighted density total number of the landslide, Method#1, (b) density total number, weighting value, and age of landslide, Method#2, and (c) density total number, weighting value, age, and activity level of the landslide, Method#3. The density number is counted by overlying· each of the landslide maps and each of the causative factors maps used, and from this step, the weighting value is derived. The resulting density number of landslide given as a cumulative percentage and the corresponding weighting value were then plotted on an X-Y graph. From the graph, the level of landslide hazard is classified by applying: (1) standard classification procedure as the default statistical analysis given by the software used, and (2) natural classification procedure as it based on the nature of the curve slope of the cummulative graphic. The result given by the three methods were varied but in general, they gave landslide hazard maps with a similar pattern in which the very high and very low hazard levels in the study area increased during the period of 1981-1994. Of the three methods, applying the natural classification gave a better result than that of the standard classification procedure. Method#2 and Method#3 were better than Method#1 in predicting the future landslide occurrence. Apparently, Method#3 should show the best result but the effect of conversion from raster to vector data in GIS significantly reduced the quality of the resulting map.

PENGARUH PENGERINGAN CONTOH TANAH TERHADAP BEBERAPA SIFAT FISIK DAN KIMJA TANAH BERSIFAT VERTIK SERTA KLASlFIKASINYA MENURUT TAKSONOMI TANAH Djunaedi Abdul Rachim; Dyah Tjahjandari
Jurnal Ilmu Tanah dan Lingkungan Vol 2 No 1 (1999): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

This laboratory experiment was carried out to study the effect of soil samples drying on the physical and chemical properties of vertic soils and their classification according to soil taxonomy. Usually, soil analysis is held on samples in air-dried condition. Clays of some soil types, however, have irreversible properties upon drying which can cause a bias in the measurement results and classification outputs of the soils. To study the irreversibility of clays upon drying, 25 samples of vertic soils were treated in moist and air-dried conditions prior to analysis. The statistical procedure of Match Pair Comparison was used to test the effect of the treatments. The results showed that the irreversibility of day upon drying was reflected in the measured soil properties except for exchangeable-A! and -K, organic-C. and soil-CEC. Nevertheless, the intensity of the day irreversibility of the vertic soils studied was low. Therefore, the drying treatment did not affect their classification outputs.

MORPHOLOGICAL, PHYSICAL, AND CHEMICAL CHARACTERISTICS OF SOME VOLCANIC SOILS OF MT. GALUNGGUNG Budi Mulyanto
Jurnal Ilmu Tanah dan Lingkungan Vol 2 No 1 (1999): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Results of the study on morphological, physical, and chemical characteristics of three pedons developed on volcanic materials of Mt. Galunggung, namely BM1, 8M2, and 8M3, showed that these pedons had a different stage of profile development. Pedon BM1 is classified as undeveloped, 8M2 is medium developed, and 8M3 is strongly developed. This is mainly caused by differences in the relative age of the parent rocks and elevation. Although classified as undeveloped, the soil represented by pedon BM1, the youngest, has immediately been used by farmers for rice cultivation because of water abundance, and high availability of P, and basic cations derived from weathering of easily weathered amorphous materials and minerals. According to the Soil Taxonomy system of the USDA (Soil Survey Staff, 1996), pedons 8M1, 8M2, and 8M3 are classified as Typic Udipsamment, Taptho Hapludandic Typic Troporthent, and humic Hapludult, respectively. Whilst, according to the FAO/UNESCO system (1988), these pedons are classified as Eutric Regoso/, Eutric Regosol and Humic Aliso/, respectively.

PENGINDONESIAAN ISTILAH MIKROMORFOLOGI TANAH YANG DIGUNAKAN DALAM "HANDBOOK FOR SOIL THIN SECTION DESCRIPTION [Bullock et al., 1985]" Widiatmaka Widiatmaka; Budi Mulyanto; Astiana Sastiono
Jurnal Ilmu Tanah dan Lingkungan Vol 2 No 1 (1999): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Micromorphology is a branch of science in soil science. In micromorphological studies, soil samples are first prepared as a thin slice (with various methods), then the phenomena inside are examined using a microscope. By knowing the composition, shape, orientation, distribution patterns, structures, etc., the phenomena that occur can be interpreted, both regarding the composition of the soil, the relationship between components and the dynamics of the process that has been, moderate or expected to occur in the soil. Thus, micromorphology can and is very prospective to be developed and applied for various uses outside the field of soil science.

Hubungan Karbon Organik Terlarut dengan Sifat Tanah pada Toposekuen di Taman Nasional Bukit Duabelas: The Relationship of Dissolved Organic Carbon with Soil Properties on Toposequence in the Bukit Duabelas National Park Syamsul Arifin; Arief Hartono; Kukuh Murtilaksono; Syaiful Anwar; Sunarti Sunarti; Yakov Kuztakov
Jurnal Ilmu Tanah dan Lingkungan Vol 19 No 2 (2017): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

The organic matter in the forest ecosystem that contributes to the organic horizon of soil profile decomposes to CO2. The DOC (dissolved organic carbon) leached to the mineral soil horizons could be decomposed, leached or adsorbed onto mineral surfaces. The effect of soil properties on the DOC dynamic has not been fully understood because of limited data. The objective of this research was to characterize the DOC in Bukit Duabelas National Park and reveal the effect of soil profile position in toposequence and soil properties to the DOC. Six soil profiles were made with different positions in toposequence (two soil profiles on each upper, middle, and lower slope). Lysimeters were installed horizontally (in AO, AB and B horizons and in each soil profile) and connected to a bottle collector that placed on the bottom of the soil profile. The soil samples were collected from each of the soil profiles, at the beginning of the research, while soil solutions were collected periodically. The results showed that the independent sample t-test revealed that fluxes of DOC of soil profile on the lower slope were different from that of soil profiles on the upper and middle slopes. The concentration, amount, and fluxes of DOC in soil profile on the lower slope were higher than those of soil profiles on the upper and the middle slopes. The independent sample t-test also revealed that fluxes of DOC of AO horizons were different from those of AB and B horizons. The concentration, amount, and fluxes of DOC of AO horizon were higher than those of AB and B horizons. The result of Pearson correlation showed positive correlations between DOC fluxes with organic-C, total-N, and Cation Exchange Capacity (CEC), but negative correlation with soil bulk density, pH, and Fe dithionite-citrate-bicarbonate (Fed) content. The results suggested that soil profile on the lower slopes on toposequence had a higher amount of DOC than that on other soil profiles above it. Horizon AO had a higher amount of DOC than that of AB and B horizons. The increase of organic-C, total N and CEC increased DOC. On the other hand the increase of soil bulk density, pH and Fed decreased DOC. Keywords: DOC, horizon, soil organic matter, toposequence

Analisis Zona Bahaya Banjir dan Tsunami Berbasis Ekoregion di Provinsi Banten: Analysis of Flood and Tsunami Hazards Based on Ecoregion in Banten Province Zulham Husein; Boedi Tjahjono; Nurwajedi Nurwajedi
Jurnal Ilmu Tanah dan Lingkungan Vol 19 No 2 (2017): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Ekoregion merupakan karakteristik penciri wilayah yang biasa digunakan untuk menilai potensi lahan. Tujuan dari penelitian ini adalah untuk melihat sejauh mana ekoregion dapat digunakan untuk menilai kerentanan zona bencana banjir dan tsunami di Provinsi Banten. Penentuan zona kerentanan berbasis ekoregion dilakukan menggunakan Analytical Hierarchy Process (AHP) yang diimplementasikandalam bobot dan skor geoindikator. Geoindikator terpilihdalam penelitian ini merupakan hasil ekstraksi dari faktor pembentuk ekoregion. Langkah selanjutnya adalah penilaian zona bahaya berdasarkan kelas kerawanan (susceptibility) sedang sampai sangat tinggimenggunakanpendekatan parametrik. Hasil AHP menunjukkan bahwa bentuklahan merupakan geoindikator yang paling berpengaruh dalam penilaian zona kerawanan. Bobot geoindikator bentuklahan pada bencana banjir dan tsunami adalah 0.678 dan 0.605. Sementara geoindikator ekosistem dan komunitas vegetasiuntuk banjir bobotnya masing-masingadalah 0.150 dan 0.173,sedangkan untuk bencana tsunami,bobotnya masing-masing adalah 0.157 dan 0.237. Hasil analisis kerentanan banjir selanjutnya diuji dengan menggunakan indeks akurasi Kappa.Hasilnya menunjukkan korelasi lebih dari 81% antara hasil analisis dan kondisi eksisting. Adapun, uji akurasi analisis bahaya menunjukkan akurasi kurang dari 80%. Hasil analisis kerentanan bencana berbasis ekoregion dapat dimanfaatkan sebagai dasar pengembangan kawasan berbasis bencana, mengingat Indonesia adalah salah satu negara denganpotensi bencana alam tinggi. Kata kunci: Ekoregion, banjir, bentuk lahan, kerawanan, tsunami

Uji Fitopatogenitas, Hemolisis serta Kemampuan Mikrob dalam Melarutkan Fosfat dan Kalium: Test of Phytopathogenicity, Hemolysis and Microbial Ability in Solubilizing Phosphate and Potassium Desak Ketut Tristiana Sukmadewi; Iswandi Anas; Rahayu Widyastuti; Ania Cintaresmini
Jurnal Ilmu Tanah dan Lingkungan Vol 19 No 2 (2017): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Soil microbes have an important role in the cycle of phosphorus and potassium. Therefore, a multifunctional microbe is required to have two or more functions. Before a multifunctional test is performed, the microbes must be tested and confirmed, they are not pathogenic. The purpose of this research was to study phytopathogenicity, hemolysis and microbial ability in solubilizing phosphate and phosphate. The research procedure consisted of phytopathogenicity test, hemolysis test, the test of phosphate solubilizing ability on Pikovskaya solid medium and potassium solubilizing ability on Alexandrov solid medium. Based on the results of phytopatgonecity tests on bacteria and fungi, all isolates are non-phytopathogenic. From the hemolysis test of bacterial isolate BPK 2, BPK 6 and BPK 7 caused total hemolysis. Based on the hemolysis test of fungi isolate SSIO 6 caused total hemolysis, FPF E1 and JK 6 caused partial hemolysis. Isolate BPK 5 has the highest index in solubilizing potassium (1.375), while isolate BPF 9 has the highest index in solubilizing phosphate (1.533). Keywords: Microbe, multifunctional, pathogenicity, phosphate solubilizing, potassium solubilizing

Karakteristik Beberapa Sifat Tanah pada Berbagai Posisi Lereng dan Penggunaan Lahan di DAS Ciliwung Hulu: Characteristics of Several Soil Properties in Various Slope Position and Land Use in Upper Ciliwung Watershed Marisa Dwi Putri; Dwi Putro Tejo Baskoro; Suria Darma Tarigan; Enni Dwi Wahjunie
Jurnal Ilmu Tanah dan Lingkungan Vol 19 No 2 (2017): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Bentuk lahan dikenal sebagai unit tanah dengan fase atau takson tertentu tergantung pada sistem pemetaan. Tujuan dari penelitian ini adalah untuk mengkarakterisasi perbedaan beberapa sifat tanah sepanjang bentuk lahan. Dihipotesiskan bahwa posisi tanah dalam bentuklahan menunjukkan sifat yang berbeda. Data dianalisis secara kuantitatif dengan teknik deskriptif termasuk variasi rata-rata, standar deviasi dan koefisien varian dilanjutkan dengan analisis varian menggunakan Least Significance Different (LSD). Hasil penelitian menunjukkan bahwa sifat-sifat tanah, khususnya permeabilitas tanah memiliki perbedaan yang signifikan sesuai dengan posisi urutan kemiringannya dalam bentuk lahan tertentu. Kata kunci: Bentuk lahan, penggunaan lahan, permeabilitas, posisi lereng, bobot isi tanah

Populasi Mikrob Fungsional pada Rhizosfer Kelapa Sawit di Lahan Gambut Riau: Functional Microbial Population on Oil Palm Rhizosphere in Riau Peatlands Morgan Ohiwal; Rahayu Widyastuti; Supiandi Sabiham
Jurnal Ilmu Tanah dan Lingkungan Vol 19 No 2 (2017): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Oil palm growth in peatland may influence the presence of microbial populations. Root exudate is one of the organic compounds that is released by oil palm roots in the rhizosphere area where it can be used as a nutrient for microbes to survive in peatland. The study was conducted to study functional microbial population in the rhizosphere area of oil palm plantation aged <6, 9−15, and >15 years in Riau peatlands. The highest microbial populations were found in oil palm plantation aged <6 years at peat thicknesses of <3 and >3 m, which was respectively 10.3 x 106 and 5.7 x 106 CFU g-1. The highest cellulolytic microbial population was found in oil palm plantation aged <6 years at peat thicknesses of <3 and >3m, which was respectively 17.4 x 104 and 11.4 x 104 CFU g-1. The highest Azotobacter population was found in oil palm plantation aged >15 years at peat thicknesses of <3 and >3m, which was respectively 9.4 x 105 and 12.5 x 105 CFU g-1. The highest phosphate solubilizing microbial population was found in oil palm plantation aged <6 years at peat thicknesses of <3 and >3m, which was respectively 11.4 x 104 and 13.2 x 104 CFU g-1. The highest fungal population was found in oil palm plantation aged <6 years at peat thicknesses of <3 m and >3 m, which was respectively 11.4 x 104 CFU g-1 and 17.3 x 104 CFU g-1. The highest white-rot fungal population was found in oil palm plantation aged 9−15 years at peat thicknesses of <3 m and >3 m, which was respectively 8.7 x 103 CFU g-1 and 9.4 x 103 CFU g-1. In conclusion, the highest microbial population was dominantly found in oil palm plantation aged <6 years. Keywords: Microbial populations, oil palm plantation, peat thickness, rhizosphere area

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Jurnal Ilmu Tanah dan Lingkungan Vol 19 No 2 (2017): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

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