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Prof. Widiatmaka
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jtl_soilipb@yahoo.com
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Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, Institut Pertanian Bogor, Jl. Meranti Wing 12 Lt 4, Kampus IPB Darmaga, Bogor 16680
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INDONESIA
Jurnal Ilmu Tanah dan Lingkungan (Journal of Soil Science and Environment)
ISSN : 14107333     EISSN : 25492853     DOI : -
Core Subject : Agriculture, Social,
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.
Articles 6 Documents
Search results for , issue "Vol 11 No 1 (2009): Jurnal Ilmu Tanah dan Lingkungan" : 6 Documents clear
RESPON VARIETAS PADI IR64 DAN IR64-SUB 1 TERHADAP PERENDAMAN DAN PEMUPUKAN N Ikhwani Ikhwani; Gagad R Pratiwi; Abdul Karim Makarim
Jurnal Ilmu Tanah dan Lingkungan Vol 11 No 1 (2009): 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 (320.3 KB) | DOI: 10.29244/jitl.11.1.1-7

Abstract

There are many new rice varieties have been produced, introduced and breed at IRRI and the other National Agriculture Research Institutes that are tolerance to submergence condition to anticipate global warming and flash flooding around theworld. Among others are IR64-Sub 1, Suwarna-Sub 1, Inpara-1, Inpara-2, inpara-3 etc. However, those new varieties have not been tested widely yet, and the method of rice cultivation under submergence condition have not been adjusted, including the nutrient management.A greenhouse experiment was conducted at Muara Research Station, Bogor during 2008 dry season. The objectives of this experiment are (1) to study the effects of time of submergence and N application on plant growth and yield of  R64 and IR64-Sub 1 rice varieties; (2) to find the best nutrient management for submergence rice varieties. The experiment was conducted during 2008 dry season at greenhouse, Muara Research station, Bogor. The design of the  experiment was a Completely Randomized Factorial Design with three eplications. Factor 1 is rice variety (IR64 and IR64-Sub 1); Factor 2 is time of submergence (without submergence or control, submergence at vegetative phase (15 to 25 d.a.t), and at generative phase (35 to 45 d.a.t)). Factor 3 is N application, namely (F1) 300 kg Urea/ha 3x applications at 7 d.a.t- 30 d.a.t – 55 d.a.t; (F2) Mudball urea –300 kg Urea/ha applied once at 7 d.a.t. (F3) compost; and (F4) compost and urea; (F5) Urea and silikat.urea-N application at four time 0 d.a.t – 7 d.a.t – 30 d.a.t – 55 d.a.t (factor C). The results of experiments showed that submergence changes rice plant growth pattern (mainly tiller number and plant height), increased dry grain weight of IR64, namely 35.9 g at early vegetatif phase and 29.9 g at late vegetatif phase, while for IR64-Sub 1 32.6 g and 30.3 g at the same respective phase. Mudball urea and silicate application improved plant resistant to submergence and increase rice yield.
EMISI CO2 PADA KEBUN KELAPA SAWIT DI LAHAN GAMBUT: EVALUASI FLUKS CO2 DI DAERAH RIZOSFER DAN NON RIZOSFER Etik Puji Handayani; Komarudin Idris; Supiandi Sabiham; Sri Juniwati; Meine van Noordwijk
Jurnal Ilmu Tanah dan Lingkungan Vol 11 No 1 (2009): 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 (228.548 KB) | DOI: 10.29244/jitl.11.1.8-13

Abstract

Sources of CO2 from the soil include root respiration, decomposition of newly fallen aboveground litter and decomposition of old soil organic matter. Rhizosphere processes play a key role in soil respiration which is the main carbon efflux from peatland ecosystem to atmosphere. Plant rhizodeposits supply low-molecular weight carbon substrates to the soil microbial community, resulting in elevated levels of activity surrounding the root. We studied the effects of rhizosphere in oil palm plantation on the fluxes of CO2. Carbon dioxide emission flux of peatland was collected in Meulaboh, West Aceh using cylindrical chambers and analysis air samples of chamber by gas chromatograph. Five-point transects perpendicular to drainage canal provided variation in depth of water  table for the samples. The data confirmed that The CO2 flux from rhizosphere chamber with additional roots was one to four times higher than from bulk soil chamber.
KAJIAN RISIKO LINGKUNGAN UNTUK PENGGUNAAN AGEN HAYATI DI BIDANG PERTANIAN Dwi Andreas Santosa
Jurnal Ilmu Tanah dan Lingkungan Vol 11 No 1 (2009): 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 (227.664 KB) | DOI: 10.29244/jitl.11.1.14-20

Abstract

In Indonesia, the biological agents have been widely used in the agriculture for reducing chemical fertilizers uses, for controlling plant pest and pathogens, and for increasing rate of composting process. The application of biological agents is especially important in the organic agriculture practices. The agents consist of microorganisms both fungi and bacteria, and in some extent are also viruses, that part of them are imported from other countries. Based on their characteristics, any biological agents that are released into the environment can pose potential problems to the environment or the ecology.  There is a Ministerial Decree that require an environmental risk assessment (ERA) for getting a permission of an importation of biological agents. Unfortunately, there is not any guidance to conduct ERA of biological agents. This paper reviews ERA and using of the approach to do a risk assessment of biological agents that will be used in agriculture.
HUBUNGAN KARAKTERISTIK LAHAN DENGAN PRODUKTIVITAS TBS (Studi Kasus pada PT. Perkebunan Nusantara VIII Cimulang, Bogor) Komarsa Ganda Sasmita; Basuki Sumawinata; Sry Nurmala
Jurnal Ilmu Tanah dan Lingkungan Vol 11 No 1 (2009): 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 (303.059 KB) | DOI: 10.29244/jitl.11.1.21-31

Abstract

Oil palm (Elaeis guineensis Jacq) is an important crop for Indonesia as one of non fuel export commodities. Development, improvement of quality and productivity of oil palm is influenced by a lot of factors, among others are land characteristics. This research was aimed to know the relationship between oil palm productivity and physical land characteristic including soil, slope and the crop age. The results of this research were expected to be useful to improve oil palm productivity and the oil palm plantation development.This research was done within the site of PT. Perkebunan Nusantara VIII at Cimulang, Bogor. In this research, analyzing correlation between productivity of blocks that have homogenous land characteristic with physical land characteristic parameter including soil and slope. Block with homogenous land characteristic was block which 75% or more of it’s area had similar characteristics. These blocks were determined by overlying block map, slope map and soil map. The result show that were 20 homogenous blocks out of all the 38 blocks of the site the PT. Perkebunan Nusantara VIII at Cimulang. Average production was depend on crop age. At study areas, the highest average fresh fruit bunch production obtained from plants 5 years, which was equal to 22.87 tons acre-1 year-1 and the lowest average fresh fruit bunch production obtained from plants 3 years, which was equal to 0.66 tons acre-1 year-1.  Based on soil, the highest average fresh fruit bunch production obtained from the SPT 11 (Typic Eutrudox), which was equal to 12.54 tons/acre/year and the lowest average fresh fruit bunch production obtained from SPT 1 (Oxic Dystropept), which was equal to 9.51 tons/acre/year. Based on slope class, the highest average fresh fruit bunch production obtained from block with slope class B (8-15%), which was equal to 12.54 tons/acre/year, and the lowest average production was equal to 9.98 tons/acre/year from the slope class. 
MODEL HUBUNGAN ANTARA JUMLAH PENDUDUK DENGAN LUAS LAHAN PERTANIAN DAN PERMUKIMAN (Studi Kasus DAS Cidanau, Provinsi Banten) Khursatul Munibah; Santun R P Sitorus; Ernan Rustiadi; Komarsa Gandasasmita; Hartrisari Hartrisari
Jurnal Ilmu Tanah dan Lingkungan Vol 11 No 1 (2009): 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 (347.439 KB) | DOI: 10.29244/jitl.11.1.32-40

Abstract

Increasing of population will effect to economic development that need the appropriation of lands for settlement, industry, infrastructure and service. Purposes of this research were to project population on 2018 and 2030; analyze land use change on period 2006-2018 and 2018-2030; analyze correlation between population with agriculture area and population with settlement area. Analysis of land use change was obtained by overlapping multitemporal land use maps. Regression approach was used to project population on 2018 and 2030; correlate between population with agriculture area and population with settlement area. The Result showed that 48% of villages which its population projection based on saturation model and 52% based on exponential model. Increasing rate of Agriculture area and settlement were 1,48%/12 years and 0,86%/12 years, respectively. Correlation between population with agriculture area were linier with R2 = 0, 7167 (2006); 0, 6343 (2018) and 0, 5082 (2030). Correlation between population with settlement were linier with R2 = 0, 7168 (2006); 0, 7312 (2018) and 0,568 (2030). Dynamical of R2 values showed contributory influence of population factor in increasing of agriculture area and settlement area.
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Jurnal Ilmu Tanah dan Lingkungan Vol 11 No 1 (2009): 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 (130.738 KB) | DOI: 10.29244/jitl.11.1.%p

Abstract

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