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Jurnal Ilmu Tanah dan Lingkungan (Journal of Soil Science and Environment)
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 5 Documents
 1 
Search results for , issue "Vol 2 No 2 (1999): Jurnal Ilmu Tanah dan Lingkungan" : 5 Documents clear
KEMAMPUAN BAKTERI DARt EKOSISTEM AIR HITAM KALIMANTAN TENGAH DALAM MEROMBAK MINYAK BUMI DAN SOLAR Iswandi Anas; Noegroho Hadi; Dwi Andreas Santosa
Jurnal Ilmu Tanah dan Lingkungan Vol 2 No 2 (1999): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (907.703 KB) | DOI: 10.29244/jitl.2.2.1-7

Abstract

The objective of this experiment was to evaluate the abili!y of bacteria strains isolated from black water ecosystem of Central Kalimantan in degrading crude oil and diesel oil. The experiment was conducted at the Laboratory of Soil Biology, Department of Soil Sciences, Faculty of Agriculture, Bogor Agricultural University (IPB). The crude oil degrading ability of bacteria was tested on a minimum liquid medium (Gurujeyalakshmi dan Orial, 1989) and soil. Six crude oil and diesel oil degrading bacteria were isolated. The bacteria were identified as Bacillus panthotenticus (2 strains), B. circulars (1 strain), Pssudomonas diminuta (1 strain), P. stufzeri (1 strain) and Klebsiella edwardsii (1 strain). These bacteria were able to degrade crude oil or diesel oil whether in a liquid minimum medium or in soil.On a minimum liquid medium, after 10 days incubation, bacteria were able to degrade 20.49% of the crude oil, while in the Entisol soil, after 7 days of incubation, as high as 40.29% of crude oil was degraded and after 28 days incubation, 64.95 of crude oil had been degraded by selected bacteria.
The Potential Use of Humic Acids Didiek Hadjar Goenadi
Jurnal Ilmu Tanah dan Lingkungan Vol 2 No 2 (1999): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1191.505 KB) | DOI: 10.29244/jitl.2.2.23-31

Abstract

The potential use of humic acids has received a great deal of attention during the last decade. Many research workers have suggested the advantage one can expect in the application of humic acids to provide a better growth of plants. Although their characteristics are subjected to considerable variation according to the sources from which they were extracted, the common effect of their application shows very convincing phenomena. However, such information is stilt limited in Indonesia resulting in a somewhat ignorance among the scientists in the country about the remarkable potential of the humic acid application. The objective of this discussion is, therefore, to elaborate basic information regarding the extraction techniques, characteristics variation, potential use as organic-N sources in the form of amino acids for carrier component of microbial inoculants and tissue culture media of plants, ion uptake enhancer, promoter of proteins and nucleic acids synthesis, and enzyme activator.
INOKULASI GANDA RHIZOBIUM DENGAN CENDAWAN ARBUSCULAR MIKORIZA PADA BANGKUANG Iswandi Anas; T Yulliawati; J Heinzemann
Jurnal Ilmu Tanah dan Lingkungan Vol 2 No 2 (1999): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (563.064 KB) | DOI: 10.29244/jitl.2.2.18-22

Abstract

Single inoculation with respectively three strains of Rhizobium (Ci-1, Ci-2, Ci-3) and two strains of arbuscular mycorrhizal fungi (78-1 and 41-3) as well as their double inoculation had been tested for their effectiveness in increasing the growth of yam bean (Pachyrhizus erosus) in a greenhouse experiment. This study was conducted at the Laboratory of Soil Biology, Department of Soil Sciences, Faculty of Agriculture, Bogor Agricultural University (IPB) Bogor. The results showed that all Rhizobium inoculation did not increase the growth of yam bean. On the other hand, inoculation with two strains of arbuscular mycorrhizal fungi increased the plant growth significantly (4 times for strain 78-1 and 1.46 time for 41-3). Double inoculation between three Rhizobium strains and two of arbuscular mycorrhizal fungi strains (78-1 and 41-3) was not significantly different from a single arbuscular mycorrhizal fungi inoculation (78-1 or 41-3).
ANALISIS KERAGAAN SISTEM USAHATANI BERBASIS LAHAN R Sunsun Saefulhakim; Dyah Retno Panuju; Lutfi I Nasoetion
Jurnal Ilmu Tanah dan Lingkungan Vol 2 No 2 (1999): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1148.084 KB) | DOI: 10.29244/jitl.2.2.32-39

Abstract

Efficiency and productivity are important terms in understanding the performance of the farming system. The landbased farming system is generally efficient and productive if it operates in a certain range of landholding scale. This study assumed that efficiency and productivity are related to farmland holding scale, land fragmentation, and cropping diversification. In a land-based farming system, land ownership holding scale and fragmentation and cropping diversification are assumed to have specific correlation. This study was conducted under a cooperation work between Research Institute of Bogor Agricultural University and Agency for Research and Development of Department of Agriculture, in research titled "Cropping Diversification and Employment Development, Stage 11". The study area comprised 6 (six) provinces, i.e.: North Sumatera, South Sumatera, Lampung, West Java, East Java, and South Sulawesi. From these provinces, it was sampled 12 districts. This study concludes that a lower level of efficiency, productivity, and farmer income is significantly related to a smaller scale of farmland ownership holding, highly fragmented land ownership holding, and miscoordinated (sprawl) land utilization pattern. Farmland tends to decrease every year, but the fragmentation of land ownership/holding tends to increase every year. In another way, miscoordinated land utilization pattern tends to expand. Therefore, the arrangement of land ownership/holding, consolidation of land, and coordination of land utilization are expected to be one of the effective policy instruments in solving current problems of land-based farming system's efficiency and productivity.
Comparison of Chemical Properties and Application as Acid Soil Amendment of Pretreatment Center Slag and Other Slags Suwarno Suwarno; Itsuo Goto; Hiroshi Masujima
Jurnal Ilmu Tanah dan Lingkungan Vol 2 No 2 (1999): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1308.629 KB) | DOI: 10.29244/jitl.2.2.8-17

Abstract

Chemical properties of Pretreatment center slag (PTC-slag) were analyzed and compared to those of converter slag (C slag) and blast furnace slag (BF slag). PTC slag had a high EC value as well as citric acid soluble P and contained more Ca, Si, P, K, and Na but less Mg and Fe than C slag. Compared to BF slag, PTC slag contained more Fe, Ca, Mg, P, Mn, and Na but less Si, Al, and K. Although neutralizing value of PTC slag was lower than that of C slag, its ability to neutralize soil acidity was markedly higher. A pot experiment using Andisol from Tochigi Prefecture and komatsuna plant was carried out to evaluate PTC slag as liming material as well as P fertilizer. PTC slag, C slag, and dolomite were applied as liming materials and combined with super phosphate (SP). Addition of SP of 2.5 and 5.0% phosphate absorption coefficient (PAC) to PTC slag significantly improved the yield of komatsuna. This result, however, only apply for PTC slag adjusting soil pH to 6.5. Addit~ono f the same dosage of SP to PTC slag adjusting soil pH to 7.5 did not give significant effect. On the other hand, addition of SP of 2.5 and 5.0% PAC to C slag or dolomite significantly improved the yield for both C slag or dolomite adjusting. the soil pH to 6.5 and 7.5. Results of the experiment also indicated that P'TC slag and C slag significantly increased soil pH; exchangeable Ca, and Mg and improved available P, B, and Mn in Andisol. The magnitudes of these effects of the two slags, however, were difference. As compared to C slag and dolomite, PTC slag increased lower exchangeable Mg but higher available P. These results suggest that for acid soil amendment, PTC slag was better than dolomite and C slag due to the fact that this material supply more P and B. Application of PTC slag as acid soil amendment will reduce the demand of P fertilizer, and even in high dosage can meet the P demand of komatsuna plant.

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