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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 9 No 2 (2007): Jurnal Ilmu Tanah dan Lingkungan" : 5 Documents clear
Agricultural Land Conversion and Land Use Change Dynamics in North Bandung Area Agus Ruswandi; Ernan Rustiadi; Kooswardhono Mudikdjo
Jurnal Ilmu Tanah dan Lingkungan Vol 9 No 2 (2007): 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 (604.107 KB) | DOI: 10.29244/jitl.9.2.63-70

Abstract

Agricultural land conversion is considered as one of an important issus in the developing areas. In spite of theimportance of informations on the quantity and the rate of land conversion as the basis of formulating the agricultural landconversion policy, those informations are limited. This research was conducted at Lembang and Parongpong Sub-District,Bandung District. The objectives of research are to identify the rate of agricultural land conversion and to measure thedynamic change of land use. Land use in 1992 and 2002 was evaluated by interpretating the result of 1992 and 2002 landsatimage using Geographic Information System (GIS) program. Shift Share analysis was conducted to know the dynamic changeof land use. Results of the study indicated that land conversion at Lembang and Parongpong Sub-District during the period of1992-2002 (ten years) about 3,134.49 ha (25%) or 313.5 ha (2,96%) per year. Forestland reduced the most, from 5,470 ha in 1992 to 1,746 ha in 2002 or reduced about 3,732.12 ha (68%) in ten years. While area of the bush was increased about2,780.20 ha (1,326%) during the same period, from 210 ha in 1992 to 2,990 ha in 2002. Low land was decreasedfrom 252 hain 1992 to 95 ha in 2002, up land was decreased from 3,856 ha in 1992 to 2,736 ha in 2002, mix farming was increasedfrom2,491 ha in 1992 to 4,358 ha in 2002, resettlement was increased from 359 ha in 1992 to 1,612 ha in 2002, bare wasdecreasedfrom 1,115 ha in 1992 to 217 ha in 2002, lake was decreasedfrom 52 ha in 1992 to 50 ha in 2002.
Soil Moisture Characteristics on Several Soil Types Dwi Putro Tejo Baskoro; Suria Darma Tarigan
Jurnal Ilmu Tanah dan Lingkungan Vol 9 No 2 (2007): 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 (334.671 KB) | DOI: 10.29244/jitl.9.2.77-81

Abstract

Soil water availability is one of the important factors injluencing plant growth. Soil that can store more water in alonger time can support a better plant growth. This study was aimed to evaluate the dynamics of soil water of four differentsoils with different characteristics. Four soils classes are clayey textured soils-Red Yellowish Podsolik Jasinga, Clayeytextured soils-Latosol Darmaga, . Sandy Textured soil-Regosol Sindang Barang, and highly organic mater content soi/sAndosolSukamantri. The result showed that at every-suction analyzed, Andosol Sukamantri had consistently highest watercontent while Regosol Sindang Barang was consistently lowest. Similar tendency wasfoundfor available water capacity. Theresult also showed that moisture content at Regosol decrease more rapidly than those of the other three soils. The time need to reach likely constant moisture content is variable with soil type; lowest at Regosol Sindangbarang (45 hours after completely saturated and drained) followed by Podsolik Jasinga (73 hours), Latosol darmaga (74 hours) and Andosol Sulcamatri (76 hours).
Isolation, Carriers Selection and Inoculum Formulation of Thiobacillus spp. Fahrizal Hazra; Enny Widyati
Jurnal Ilmu Tanah dan Lingkungan Vol 9 No 2 (2007): 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 (336.836 KB) | DOI: 10.29244/jitl.9.2.71-76

Abstract

One of problems in international trading of coal is high content of suljur. B iodesuljuration of coal using Thiobacillusspp is recognized as the most environmentally friendly to reduce the content. This research was aimed to collect and to isolateThiobacillus spp from coal, acid mine drainage, ex-coal mining soil and agriculture soil, on selected media. Colonies growingon the media were re-isolated for further characterization to find the most similar to Thiobacillus spp. In this experiment, the selected isolate (5, J 0, 20, 50, and J 00 ml) was cultured in 100 g of coal dust, rice husk charcoal, wood charcoal, andactivated charcoal, to find an appropriate inoculum for coal desulJuration. To observe their survival rate, they were reisolated onto 10 ml Thiobacillus broth medium. The re-isolations were observed at the 7, 14, 21 and 28 days of incubation. The results showed that ThiobaciIlus spp was found only in acid mine drainage. After characterization, the isolates were strongly similar to Thiobacillusferrooxidans. The most proper inoculum was 100 ml culture ofThiobacillus in 100 g rice husk charcoal. It had 100% survival rate after 20 days cultured in that carrier.
Water Saving for Paddy Cultivation Under the System of Rice Intensification (SRI) in Eastern Indonesia Mohammad Hasan; Shuichi Sato
Jurnal Ilmu Tanah dan Lingkungan Vol 9 No 2 (2007): 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 (470.239 KB) | DOI: 10.29244/jitl.9.2.57-62

Abstract

The System of Rice Intensification (SRI) developed in Madagascar in 1980s is a revolutionary new idea for paddycultivation to increase yields with reduced external resources. Basic idea of SRI originally proposed (Basic SRI) is to applycombination of (a) transplanting of young seedlings with wider spacing and (b) intermittent irrigation during vegetativegrowth period Further, application of organic fertilizers without use chemicals has practiced as "Organic SRI" as an idealapproach to improve soil and to produce high quality rice. Over the past fIVe years, a Japan-funded irrigation project inEastern Indonesia executing by the Directorate General of Water Resources, the Ministry of Public Works has introduced SRIand assessed it's potential to reduce demandfor irrigation water while rewardingfarmers with higher production and incomes.This paper reports on on-farm comparative evaluations conducted over 9 seasons between 2002 and 2006 across 8 provincesunder DISIMP. It summarizes the results of 12,133 comparison trials that covered a total area of 9,429 hectares. Averageyield increase was 78% (3.3 tlha) with reductions of 40% in water use, 50% in fertilizer applications, and 20% in the costs ofproduction. As a conclusion, SRI practices can achieve significantly higher output of rice with a reduction in inputs, enhancingsimultaneously the productivity of the resources (land, labor, water and capital) used in irrigated rice production. Theeconomic attractiveness of SRI methods is very great, giving farmers strong incentive to accept water-saving as new norm forirrigated rice production.
Farmer Innovations Improving the System of Rice Intensification (SRI) Norman Uphoff
Jurnal Ilmu Tanah dan Lingkungan Vol 9 No 2 (2007): 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 (900.389 KB) | DOI: 10.29244/jitl.9.2.45-56

Abstract

The System of Rice Intensification (SRI), assembled in Madagascar over a 20-year period and gaining applicationinternationally since 2000, enables farmers to raise their irrigated rice production substantially just by making changes in theway they manage their plants, soil, water and nutrients, rather than by increasing inputs such as fertilizer, water oragrochemicals. Getting more output with less cost enhances profitability. This result is quite unprecedented, as discussed inpaper accompanying this one. SRI is not considered by its proponents as a technology; and by not presenting it to farmers asa set technology, this opens SRI up to many adaptations and innovations by farmer-users, who often but not always arecollaborating with NGO or government staff in a collaborative manner. This paper reports on a number of the innovations thathave been made in SRI practices, demonstrating bothfarmer capabilities and the advantages of engagingfarmers as partnersin an ongoing process of participatory development. The companion paper which considers SRI as a system for innovationoffers a more 'macro' view of SRI spread that complements this more 'micro' perspective.

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